add aux files, copyright-notice

pull/1/head
Frank Bösing 9 years ago
parent bca628cce7
commit 786f6d898b
  1. 28
      reSID.cpp
  2. 28
      reSID.h
  3. 3
      reSID/AUTHORS
  4. 340
      reSID/COPYING
  5. 313
      reSID/ChangeLog
  6. 229
      reSID/INSTALL
  7. 271
      reSID/NEWS
  8. 26
      reSID/README
  9. 87
      reSID/THANKS
  10. 8
      reSID/TODO
  11. 2
      reSID/filter.cc
  12. 4
      reSID/wave.cc
  13. 29
      sid.cpp
  14. 28
      sid.h

@ -1,4 +1,30 @@
/*
Arduino SID
Copyright (c) 2015 Frank Bösing
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
The helix decoder itself as a different license, look at the subdirectories for more info.
Diese Bibliothek ist freie Software: Sie können es unter den Bedingungen
der GNU General Public License, wie von der Free Software Foundation,
Version 3 der Lizenz oder (nach Ihrer Wahl) jeder neueren
veröffentlichten Version, weiterverbreiten und/oder modifizieren.
Diese Bibliothek wird in der Hoffnung, dass es nützlich sein wird, aber
OHNE JEDE GEWÄHRLEISTUNG, bereitgestellt; sogar ohne die implizite
Gewährleistung der MARKTFÄHIGKEIT oder EIGNUNG FÜR EINEN BESTIMMTEN ZWECK.
Siehe die GNU General Public License für weitere Details.
Sie sollten eine Kopie der GNU General Public License zusammen mit diesem
Programm erhalten haben. Wenn nicht, siehe <http://www.gnu.org/licenses/>.
Der Helixdecoder selbst hat eine eigene Lizenz, bitte für mehr Informationen
in den Unterverzeichnissen nachsehen.
*/
#include "reSID.h" #include "reSID.h"
#include <AudioStream.h> #include <AudioStream.h>

@ -1,4 +1,30 @@
/*
Arduino SID
Copyright (c) 2015 Frank Bösing
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
The helix decoder itself as a different license, look at the subdirectories for more info.
Diese Bibliothek ist freie Software: Sie können es unter den Bedingungen
der GNU General Public License, wie von der Free Software Foundation,
Version 3 der Lizenz oder (nach Ihrer Wahl) jeder neueren
veröffentlichten Version, weiterverbreiten und/oder modifizieren.
Diese Bibliothek wird in der Hoffnung, dass es nützlich sein wird, aber
OHNE JEDE GEWÄHRLEISTUNG, bereitgestellt; sogar ohne die implizite
Gewährleistung der MARKTFÄHIGKEIT oder EIGNUNG FÜR EINEN BESTIMMTEN ZWECK.
Siehe die GNU General Public License für weitere Details.
Sie sollten eine Kopie der GNU General Public License zusammen mit diesem
Programm erhalten haben. Wenn nicht, siehe <http://www.gnu.org/licenses/>.
Der Helixdecoder selbst hat eine eigene Lizenz, bitte für mehr Informationen
in den Unterverzeichnissen nachsehen.
*/
#include "sid.h" #include "sid.h"
#ifndef play_sid_h_ #ifndef play_sid_h_

@ -0,0 +1,3 @@
Authors of reSID.
Dag Lem: Designed and programmed complete emulation engine.

@ -0,0 +1,340 @@
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Library General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.
We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software. If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.
Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and
modification follow.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language. (Hereinafter, translation is included without limitation in
the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope. The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.
You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in
whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
c) If the modified program normally reads commands interactively
when run, you must cause it, when started running for such
interactive use in the most ordinary way, to print or display an
announcement including an appropriate copyright notice and a
notice that there is no warranty (or else, saying that you provide
a warranty) and that users may redistribute the program under
these conditions, and telling the user how to view a copy of this
License. (Exception: if the Program itself is interactive but
does not normally print such an announcement, your work based on
the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.
In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.
3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:
a) Accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of Sections
1 and 2 above on a medium customarily used for software interchange; or,
b) Accompany it with a written offer, valid for at least three
years, to give any third party, for a charge no more than your
cost of physically performing source distribution, a complete
machine-readable copy of the corresponding source code, to be
distributed under the terms of Sections 1 and 2 above on a medium
customarily used for software interchange; or,
c) Accompany it with the information you received as to the offer
to distribute corresponding source code. (This alternative is
allowed only for noncommercial distribution and only if you
received the program in object code or executable form with such
an offer, in accord with Subsection b above.)
The source code for a work means the preferred form of the work for
making modifications to it. For an executable work, complete source
code means all the source code for all modules it contains, plus any
associated interface definition files, plus the scripts used to
control compilation and installation of the executable. However, as a
special exception, the source code distributed need not include
anything that is normally distributed (in either source or binary
form) with the major components (compiler, kernel, and so on) of the
operating system on which the executable runs, unless that component
itself accompanies the executable.
If distribution of executable or object code is made by offering
access to copy from a designated place, then offering equivalent
access to copy the source code from the same place counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.
4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.
5. You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify or
distribute the Program or its derivative works. These actions are
prohibited by law if you do not accept this License. Therefore, by
modifying or distributing the Program (or any work based on the
Program), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
the Program or works based on it.
6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject to
these terms and conditions. You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
You are not responsible for enforcing compliance by third parties to
this License.
7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Program at all. For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.
If any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
circumstances.
It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded. In such case, this License incorporates
the limitation as if written in the body of this License.
9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation. If the Program does not specify a version number of
this License, you may choose any version ever published by the Free Software
Foundation.
10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission. For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this. Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General
Public License instead of this License.

@ -0,0 +1,313 @@
2004-06-11 Dag Lem <resid@nimrod.no>
* Version 0.16 released.
* envelope.h (EnvelopeGenerator::clock): Corrected off-by-one
error in check for ADSR delay bug in delta_t cycle interface.
* filter.cc (Filter::set_chip_model): Initialize filter cutoff
mappings before call to set_chip_model.
* sid.cc (SID::set_sampling_parameters): Build shifted FIR tables
with samples according to the sampling frequency.
(SID::clock_resample_interpolate): New function; factorized linear
interpolation out from filter convolutions, and made convolutions
vectorizable.
(SID::clock_resample_fast): New function; single convolution, same
accuracy as with interpolation by using more filter tables.
(SID::State, SID::read_state, SID::write_state): Read and write
rate_counter_period and exponential_counter_period. Read sustain
value.
2003-10-20 Dag Lem <resid@nimrod.no>
* Version 0.15 released.
* envelope.h (EnvelopeGenerator): Added public State enum.
(EnvelopeGenerator::clock): Rate counter is 15 bits, count
rate_period - 1 after wrapping from 0x8000 to 0 in ADSR delay bug.
* sid.cc, sid.h (SID::State): Added envelope_state.
(SID::State::write_state): Restore register 0x18.
(SID::set_sampling_parameters): Scale resampling filter to avoid
clipping.
(SID::clock_resample): Saturated arithmetics to avoid clipping.
2002-12-31 Dag Lem <resid@nimrod.no>
* Version 0.14 released.
* envelope.h (EnvelopeGenerator::clock): Corrected one cycle error
in ADSR delay bug. Only load the exponential counter period at the
envelope counter values 255, 93, 54, 26, 14, 6, 0.
* filter.cc (Filter::set_chip_model): Call set_w0() and set_Q() to
update filter settings.
(Filter::set_w0): Limit cutoff frequency for both 1 cycle and
delta_t cycle filter.
* filter.h (Filter::clock): Mix in external audio input.
* sid.cc, sid.h (SID::input): New function; accepts external audio
input sample.
* spline.h (PointPlotter::operator ()): Clamp negative values to
zero.
* voice.cc, voice.h: Changed misleading name wave_DC to wave_zero.
* wave.h (WaveformGenerator::clock): Corrected bug in check for
accumulator bit 19 in noise register shift.
2002-01-19 Dag Lem <resid@nimrod.no>
* Version 0.13 released.
* configure.in: Replaced AC_TRY_COMPILER with AC_TRY_COMPILE,
removed AC_PROG_RANLIB.
* envelope.h (EnvelopeGenerator::clock): Reset rate_step on state
change.
* extfilt.cc (ExternalFilter::set_chip_model): New calculation of
maximum mixer DC level.
* filter.cc (Filter::set_chip_model): Moved calculation of
voice_DC to voice.cc, corrected calculation of mixer_DC.
* filter.h (Filter::output): Mixer output is not inverted.
* sid.cc (SID::set_chip_model): Call voice.set_chip_model instead
of voice.wave.set_chip_model.
* voice.cc (Voice::Voice): Call set_chip_model.
(Voice::set_chip_model): New function; model both waveform D/A
converter and envelope multiplying D/A converter DC offsets.
* voice.h (Voice::output): Add both waveform D/A converter and
envelope multiplying D/A converter DC offsets.
* wave.h (WaveformGenerator::output____): Reverted to output
minimum wave level when no waveform is selected. The maximum and
minimum wave output levels are interchanged in C= Hacking Issue #20.
2001-10-20 Dag Lem <resid@nimrod.no>
* Version 0.12 released.
* envelope.cc, envelope.h, filter.cc, filter.h, wave.cc, wave.h:
Removed bool usage. This avoids unnecessary conversion to 1/0.
* filter.cc (Filter::set_chip_model): New function; selects voice
and mixer DC offsets and mapping from the FC registers to filter
cutoff frequency. The voice and mixer DC offsets for the MOS6581 are
calculated from measurements made by Hársfalvi, Levente in
C= Hacking Issue #20.
(Filter::Filter): Call set_chip_model.
(Filter::f0_6581, Filter::f0_8580): Separate FC mapping tables.
(Filter::f0_points_6581, Filter::f0_points_8580): Separate FC mapping
points.
* extfilt.cc, extfilt.h (ExternalFilter::set_chip_model): New
function supporting separate DC correction for MOS6581 and MOS8580.
* sid.cc, sid.h (SID::adjust_sampling_frequency): New function for
on-the-fly adjustment of sampling frequency.
(SID::clock_fast): Corrected sample calculation.
(SID::set_chip_model): Set filter chip model.
(SID::output): Added audio clipping.
(SID::clock, SID::clock_fast, SID::clock_interpolate,
SID::clock_resample): Added sample interleaving.
* spline.h (interpolate): Generalized to accept repeated points to
introduce points of non-differentiability and discontinuity.
* wave.h (WaveformGenerator::output____): No selected waveform
yields maximum wave output level. This was found by Hársfalvi,
Levente in C= Hacking Issue #20.
(WaveformGenerator::clock): Optimized for speed (no division).
2001-03-10 Dag Lem <resid@nimrod.no>
* Version 0.11 released.
* configure.in: Disable building of shared library by default.
Control inlining with RESID_INLINING (0 or 1) and RESID_INLINE
(blank or "inline").
* envelope.h, extfilt.h, filter.h, voice.h, wave.h: inline keyword
in both function declarations and function definitions.
* samp2src.pl: Beautified Perl code.
* sid.h, sid.cc: Replaced voice variables with array. Removed
filter variables from SID::State.
(SID::clock): New audio sample generating interface. Three
clocking methods are available; clocking at output sample
frequency, clocking at cycle frequency with linear sample
interpolation, and clocking at cycle frequency with audio
resampling.
(SID::clock_fast, SID::clock_interpolate, SID::clock_resample):
New functions called by SID::clock.
(SID::set_sampling_parameters): New function to set up SID for
sample generation. The FIR table used in SID::clock_resample is
calculated here.
(SID::I0): 0th order modified Bessel function to calculate Kaiser
window.
* siddefs.h: Control inlining with RESID_INLINING (0 or 1) and
RESID_INLINE (blank or "inline"). Added enum sampling_method.
* voice.h, voice.cc (Voice::set_sync_source): Moved setting of
sync source from constructor.
* wave.h, wave.cc (WaveformGenerator::set_sync_source): Moved
setting of sync source from constructor.
2000-11-22 Dag Lem <resid@nimrod.no>
* Version 0.10 released.
* configure.in, Makefile.am: Use libtool to build library. The
hack to "disable" install is removed.
* extfilt.h, filter.h: Moved filter stability code from sid.cc.
* sid.cc (SID::clock): Moved filter stability code to
extfilt.h/filter.h. Don't clock the rest of the chip more
frequently than necessary.
* wave.cc: Typecast for pedantic (and probably incorrect)
compilers.
2000-05-18 Dag Lem <resid@nimrod.no>
* Version 0.9 released.
* filter.h (Filter::output): The sum of the filter outputs is no
longer weighted.
1999-06-24 Dag Lem <resid@nimrod.no>
* Version 0.8 released.
* filter.h, filter.cc, wave.h, wave.cc: Typecasts for pedantic
compilers.
* filter.h (Filter::clock): Voice 3 is only silenced by voice3off
if it is not routed through the filter.
* sid.cc (SID::State): Added constructor for proper initalization.
* spline.h: Inlined template functions to avoid problems at link
time with certain compilers.
1999-02-25 Dag Lem <resid@nimrod.no>
* Version 0.7 released.
* configure.in: Check whether compiler supports bool.
* extfilt.h, extfilt.cc: Implementation of C64 filter, external to
the SID chip.
* filter.h (Filter::clock): Optimized filter routing using a switch.
(Filter::output): Optimized filter mixing using a switch, avoiding
integer division. Corrected sign of filtered output, which is
inverted compared to unfiltered output.
* filter.cc (Filter::set_w0): Removed use of M_PI and math.h
functions. Use spline table to map fc to w0.
(Filter::fc_default): Return array of FC spline interpolation points.
(Filter::fc_plotter): Return FC spline plotter object.
* sid.h (SID::enable_external_filter): Enable/disable external
filter.
(SID::fc_default): Return array of FC spline interpolation points.
(SID::fc_plotter): Return FC spline plotter object.
(SID::State, SID::read_state, SID::write_state): Read and write
complete SID state.
* sid.cc (SID::clock): Age bus value. Clock external filter.
(SID::enable_external_filter): Enable/disable external filter.
* spline.h: Spline implementation. Used to specify mapping from
the FC register to filter cutoff frequency.
1998-11-14 Dag Lem <resid@nimrod.no>
* Version 0.6 released.
* configure.in: Allow compilation in a separate directory.
* wave.h (WaveformGenerator::synchronize): Handle special case when a
sync source is synced itself on the same cycle as its MSB is set
high.
* sid.cc (SID::clock): Only clock on MSB on/off for hard sync.
1998-09-06 Dag Lem <resid@nimrod.no>
* Version 0.5 released.
* version.cc (resid_version_string): Version string with C linkage.
* wave.cc (WaveformGenerator::set_chip_model): Emulation of MOS8580
combined waveforms.
1998-08-28 Dag Lem <resid@nimrod.no>
* Version 0.4 released.
* envelope.h (EnvelopeGenerator::clock): Count up to rate_period twice
during ADSR delay bug, and add one extra rate counter step.
* filter.cc (Filter::bsd_copysign): Renamed copysign function for
compilation on platforms where copysign is implemented as a macro.
1998-08-23 Dag Lem <resid@nimrod.no>
* Version 0.3 released.
* envelope.h (EnvelopeGenerator::clock): Handle ADSR boundary bug.
* envelope.cc (EnvelopeGenerator::rate_counter_period,
EnvelopeGenerator::exponential_counter_period): Corrected counter
periods.
* filter.h (Filter::clock): Optimized for speed (division by shifting).
* sid.h (SID::clock): New one-cycle optimized overload of the clock()
function.
* wave.h (WaveformGenerator::output_P_T): Combined waveform
pulse+triangle indexing corrected.
(WaveformGenerator::output_P__): Check for test bit to handle
pulse+test bit samples.
(WaveformGenerator::output): Optimized for speed (inlining).
1998-07-28 Dag Lem <resid@nimrod.no>
* Version 0.2 released.
* envelope.h (EnvelopeGenerator::clock): Start decay cycle immediately
at envelope counter 0xff. New sustain value is zero if the sustain
level is raised above the current envelope counter value.
(EnvelopeGenerator::step_envelope): Handle ADSR delay bug.
* envelope.cc (EnvelopeGenerator::rate_counter_period,
EnvelopeGenerator::exponential_counter_period): Corrected counter
periods.
(EnvelopeGenerator::writeCONTROL_REG): Do not modify rate counter.
* filter.cc (Filter::set_Q): Constrain Q to keep filter stable.
* sid.h (SID::read, SID::write, SID::bypass_filter): Simplified API
routing register access through the SID class.
* sid.cc (SID::output): Corrected variable-bit audio output return.
(SID::read, SID::write): Allow read of write only registers.
1998-06-09 Dag Lem <resid@nimrod.no>
* Version 0.1 released.

@ -0,0 +1,229 @@
Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002 Free Software
Foundation, Inc.
This file is free documentation; the Free Software Foundation gives
unlimited permission to copy, distribute and modify it.
Basic Installation
==================
These are generic installation instructions.
The `configure' shell script attempts to guess correct values for
various system-dependent variables used during compilation. It uses
those values to create a `Makefile' in each directory of the package.
It may also create one or more `.h' files containing system-dependent
definitions. Finally, it creates a shell script `config.status' that
you can run in the future to recreate the current configuration, and a
file `config.log' containing compiler output (useful mainly for
debugging `configure').
It can also use an optional file (typically called `config.cache'
and enabled with `--cache-file=config.cache' or simply `-C') that saves
the results of its tests to speed up reconfiguring. (Caching is
disabled by default to prevent problems with accidental use of stale
cache files.)
If you need to do unusual things to compile the package, please try
to figure out how `configure' could check whether to do them, and mail
diffs or instructions to the address given in the `README' so they can
be considered for the next release. If you are using the cache, and at
some point `config.cache' contains results you don't want to keep, you
may remove or edit it.
The file `configure.ac' (or `configure.in') is used to create
`configure' by a program called `autoconf'. You only need
`configure.ac' if you want to change it or regenerate `configure' using
a newer version of `autoconf'.
The simplest way to compile this package is:
1. `cd' to the directory containing the package's source code and type
`./configure' to configure the package for your system. If you're
using `csh' on an old version of System V, you might need to type
`sh ./configure' instead to prevent `csh' from trying to execute
`configure' itself.
Running `configure' takes awhile. While running, it prints some
messages telling which features it is checking for.
2. Type `make' to compile the package.
3. Optionally, type `make check' to run any self-tests that come with
the package.
4. Type `make install' to install the programs and any data files and
documentation.
5. You can remove the program binaries and object files from the
source code directory by typing `make clean'. To also remove the
files that `configure' created (so you can compile the package for
a different kind of computer), type `make distclean'. There is
also a `make maintainer-clean' target, but that is intended mainly
for the package's developers. If you use it, you may have to get
all sorts of other programs in order to regenerate files that came
with the distribution.
Compilers and Options
=====================
Some systems require unusual options for compilation or linking that
the `configure' script does not know about. Run `./configure --help'
for details on some of the pertinent environment variables.
You can give `configure' initial values for configuration parameters
by setting variables in the command line or in the environment. Here
is an example:
./configure CC=c89 CFLAGS=-O2 LIBS=-lposix
*Note Defining Variables::, for more details.
Compiling For Multiple Architectures
====================================
You can compile the package for more than one kind of computer at the
same time, by placing the object files for each architecture in their
own directory. To do this, you must use a version of `make' that
supports the `VPATH' variable, such as GNU `make'. `cd' to the
directory where you want the object files and executables to go and run
the `configure' script. `configure' automatically checks for the
source code in the directory that `configure' is in and in `..'.
If you have to use a `make' that does not support the `VPATH'
variable, you have to compile the package for one architecture at a
time in the source code directory. After you have installed the
package for one architecture, use `make distclean' before reconfiguring
for another architecture.
Installation Names
==================
By default, `make install' will install the package's files in
`/usr/local/bin', `/usr/local/man', etc. You can specify an
installation prefix other than `/usr/local' by giving `configure' the
option `--prefix=PATH'.
You can specify separate installation prefixes for
architecture-specific files and architecture-independent files. If you
give `configure' the option `--exec-prefix=PATH', the package will use
PATH as the prefix for installing programs and libraries.
Documentation and other data files will still use the regular prefix.
In addition, if you use an unusual directory layout you can give
options like `--bindir=PATH' to specify different values for particular
kinds of files. Run `configure --help' for a list of the directories
you can set and what kinds of files go in them.
If the package supports it, you can cause programs to be installed
with an extra prefix or suffix on their names by giving `configure' the
option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
Optional Features
=================
Some packages pay attention to `--enable-FEATURE' options to
`configure', where FEATURE indicates an optional part of the package.
They may also pay attention to `--with-PACKAGE' options, where PACKAGE
is something like `gnu-as' or `x' (for the X Window System). The
`README' should mention any `--enable-' and `--with-' options that the
package recognizes.
For packages that use the X Window System, `configure' can usually
find the X include and library files automatically, but if it doesn't,
you can use the `configure' options `--x-includes=DIR' and
`--x-libraries=DIR' to specify their locations.
Specifying the System Type
==========================
There may be some features `configure' cannot figure out
automatically, but needs to determine by the type of machine the package
will run on. Usually, assuming the package is built to be run on the
_same_ architectures, `configure' can figure that out, but if it prints
a message saying it cannot guess the machine type, give it the
`--build=TYPE' option. TYPE can either be a short name for the system
type, such as `sun4', or a canonical name which has the form:
CPU-COMPANY-SYSTEM
where SYSTEM can have one of these forms:
OS KERNEL-OS
See the file `config.sub' for the possible values of each field. If
`config.sub' isn't included in this package, then this package doesn't
need to know the machine type.
If you are _building_ compiler tools for cross-compiling, you should
use the `--target=TYPE' option to select the type of system they will
produce code for.
If you want to _use_ a cross compiler, that generates code for a
platform different from the build platform, you should specify the
"host" platform (i.e., that on which the generated programs will
eventually be run) with `--host=TYPE'.
Sharing Defaults
================
If you want to set default values for `configure' scripts to share,
you can create a site shell script called `config.site' that gives
default values for variables like `CC', `cache_file', and `prefix'.
`configure' looks for `PREFIX/share/config.site' if it exists, then
`PREFIX/etc/config.site' if it exists. Or, you can set the
`CONFIG_SITE' environment variable to the location of the site script.
A warning: not all `configure' scripts look for a site script.
Defining Variables
==================
Variables not defined in a site shell script can be set in the
environment passed to `configure'. However, some packages may run
configure again during the build, and the customized values of these
variables may be lost. In order to avoid this problem, you should set
them in the `configure' command line, using `VAR=value'. For example:
./configure CC=/usr/local2/bin/gcc
will cause the specified gcc to be used as the C compiler (unless it is
overridden in the site shell script).
`configure' Invocation
======================
`configure' recognizes the following options to control how it
operates.
`--help'
`-h'
Print a summary of the options to `configure', and exit.
`--version'
`-V'
Print the version of Autoconf used to generate the `configure'
script, and exit.
`--cache-file=FILE'
Enable the cache: use and save the results of the tests in FILE,
traditionally `config.cache'. FILE defaults to `/dev/null' to
disable caching.
`--config-cache'
`-C'
Alias for `--cache-file=config.cache'.
`--quiet'
`--silent'
`-q'
Do not print messages saying which checks are being made. To
suppress all normal output, redirect it to `/dev/null' (any error
messages will still be shown).
`--srcdir=DIR'
Look for the package's source code in directory DIR. Usually
`configure' can determine that directory automatically.
`configure' also accepts some other, not widely useful, options. Run
`configure --help' for more details.

@ -0,0 +1,271 @@
Changes in reSID version 0.16
-----------------------------
An off-by-one error in the emulation of the ADSR delay bug has been
fixed in the fast version of the envelope clocking.
An initialization bug in the Filter class which caused floating point
exceptions on some platforms has been fixed.
Missing fields have been added to SID::State for correct snapshots.
By building shifted FIR tables with samples according to the sampling
frequency, the resampling code dramatically reduces the computational
effort in the filter convolutions, without any loss of accuracy. The
filter convolutions are now also vectorizable on current hardware. The
implementation builds on ideas by Laurent Ganier.
The resampling code has been split into two functions, one using
interpolation and a small set of shifted filter tables, and one using
direct lookup and a large set of shifted filter tables. The accuracy
is the same, the difference is that the direct lookup runs has the
potential of running at almost twice the speed (depending on cache
size and memory bandwidth) using approximately 16MB more memory. It is
now possible to run high quality resampling in real time on quite
modest hardware, provided that a vectorizing compiler is used.
Changes in reSID version 0.15
-----------------------------
An error in the emulation of the ADSR delay bug has been fixed. When
emulation of the ADSR delay bug was introduced in reSID 0.2, the delay
was one cycle too long. One cycle was subtracted from the delay in
reSID 0.4, however unfortunately one rate counter period was added as
well, thus increasing the error. At the time there was no method to
fully synchronize the CPU with envelope 3, so the measurements relied
on averaging. Because of pipelining in the envelope logic the effects
of a write are delayed, and this caused the test code to miss the
target by exactly one rate counter period on a real SID. The current
test code does achieve full synchronization with envelope 3, so this
time the delay should be 100% correct. There are still side effects
caused by pipelining which are not implemented in reSID, however these
effects are not controllable without full synchronization with the
envelope, something which is hard to achieve with envelope 3, and
impossible with envelope 1 and 2.
The envelope state (ADSR) has been added to the SID state, and the
volume setting is now restored from the SID state.
Filter scaling and clipping has been added to avoid sample overflows
in the resampling filter.
Changes in reSID version 0.14
-----------------------------
The SID external audio input is now emulated. This can be used e.g. to
simulate the hack of connecting a resistor from EXT IN to GND to boost
the sample volume on the MOS8580. Calling sid.input(-32768) makes the
MOS8580 sound more or less like the MOS6581 with respect to samples.
The interface could also be used to mix in an external audio signal,
but note that to do this correctly you should really resample the
audio signal to 1MHz first.
The filter settings are now updated immediately when the chip model is
changed. Earlier the filter cutoff frequency would not change until
the FC registers were updated.
A one cycle error in the fast version of the envelope clocking has
been fixed. This bug was introduced in reSID 0.13 and could affect the
ADSR delay emulation.
The exponential counter period is now only loaded at the envelope
counter values 255, 93, 54, 26, 14, 6, 0. The period can be different
for the same envelope counter value, depending on whether the envelope
has been rising (attack -> release) or sinking (decay/release).
A bug in the fast version of the noise register shift routine has been
corrected. This bug caused too low noise frequency in some cases.
The filter cutoff frequency is limited to 16kHz to keep the filter stable.
Changes in reSID version 0.13
-----------------------------
The internal DC levels of the MOS6581 have been double checked and
corrected. The reason for the asymmetric scaling of the voice output
has been found; there is a DC offset from the waveform D/A converter
in addition to the DC offset from the envelope multiplying D/A
converter. No selected waveform (N=P=S=T=0) yields minimum wave output
level again.
A bug in the fast version of the envelope clocking has been corrected.
This bug could incorrectly invoke the ADSR delay emulation.
Changes in reSID version 0.12
-----------------------------
A bug causing incorrect sample spacing in the new SAMPLE_FAST sample
calculation has been corrected.
Audio clipping has been added to guard against sample overflows.
To support multi-channel sampling, sample interleaving has been added
to the clock() interface.
To support synchronization with an external timer, an interface for
sample rate adjustment has been added.
The internal DC levels have been corrected. No selected waveform
(N=P=S=T=0) yields maximum wave output level. Furthermore, each voice
in the MOS6581 independently contributes to the DC level in the mixer,
and the mixer itself has a small DC offset as well. The MOS8580 has no
DC offsets.
The spline interpolation routine has been generalized to accept
repeated points to introduce points of non-differentiability and
discontinuity.
A separate mapping from the FC registers to filter cutoff frequency
has been included for the MOS8580, and the mapping for the MOS6581 has
been refined.
Changes in reSID version 0.11
-----------------------------
A new clock() interface has been added. This function generates audio
samples into a buffer, greatly simplifying the task of writing driver
code for reSID. It also facilitates more advanced audio sample
generation, as described below.
Three clocking methods are available: clocking at output sample
frequency, clocking at cycle frequency with linear sample
interpolation, and clocking at cycle frequency with audio resampling.
Clocking at output sample frequency is fast, and yields acceptable
sound quality, except for the SID combined waveforms, which have a
very high frequency content.
Clocking at cycle frequency with linear sample interpolation is
approximately five to ten times slower at 44.1kHz sampling frequency,
but the sound quality is improved because of the linear sample
interpolation, and because some sampling noise is removed by the SID
external filter, which attenuates signals above 16kHz.
Finally, clocking at cycle frequency with audio resampling has a work
rate which is independent of the sampling frequency; it is rather
inversely proportional to the percentage of the bandwidth allocated
to the filter transition band. This implies that e.g. with the
transition band starting at ~ 20kHz, it is faster to generate 48kHz
than 44.1kHz samples.
Audio resampling is the theoretically correct method for sample
generation, and delivers SID sound quality previously unheard of. This
should make connoisseurs nod in appreciation, and for some time to
come it could possibly also make people tear their hair over having to
buy state of the art hardware to handle the obscene workload in real
time. By trading off passband bandwidth for speed, real time
processing is possible on current hardware. A 60% passband bandwidth
is within the reach of reasonably fast machines, while maximum sound
quality at 90% passband bandwidth, requiring four times the processing
power, is not. Yet.
Changes in reSID version 0.10
-----------------------------
Libtool is now used to build the library.
To keep the filters stable it is necessary to clock them at above
sample rate. The chip clocking code has been modified to only
"overclock" the filters, not the whole chip. This yields a
considerable speedup without noticeably lowering sound quality. Note
that this is aimed at slow hardware, if possible the 1 cycle clock
interface should be used to eliminate sampling noise.
Changes in reSID version 0.9
----------------------------
The sum of the filter outputs is no longer weighted.
Changes in reSID version 0.8
----------------------------
voice3off has no effect if voice 3 is routed through the filter.
Changes in reSID version 0.7
----------------------------
The audio output filter in the C64, external to the SID chip, has been
modeled.
The mapping function between the FC register and filter cutoff frequency can
now be specified with spline interpolation points. This facilitates
interactive modification of the mapping function by graphical presentation of
the interpolation curve. The implementation of this novel spline design is
fast and general purpose, and should be well suited for use in other projects
as well.
Filtered output has been inverted compared to unfiltered output.
Aging of the bus value obtained when reading write only registers has been
partly implemented.
To facilitate offline storage the complete state of SID can be read and
written.
Changes in reSID version 0.6
----------------------------
A special case in synchronization has been implemented.
The Autoconf script is cleaned up to allow compilation in a separate directory.
Changes in reSID version 0.5
----------------------------
Emulation of MOS8580 combined waveforms.
Version string resid_version_string provided for e.g. Autoconf tests.
The string has C linkage.
Changes in reSID version 0.4
----------------------------
The implementation of the ADSR delay bug has been refined and should now be
cycle exact.
The patch for VICE has been removed since VICE 0.15 will include reSID support.
Changes in reSID version 0.3
----------------------------
The reSID library has changed name from libmos6581.a to libresid.a
The pulse+sawtooth combined waveform has been corrected.
Pulse+test bit samples are implemented.
The envelope rate periods have finally been exactly determined.
A new SID bug, the ADSR boundary bug, has been discovered and implemented.
This bug makes it possible to step from envelope level 0x00 to 0xff or from
0xff to 0x00 in one step.
One-cycle optimized overloads of the clock() functions have been implemented
to facilitate sampling at 1MHz.
The code has been further optimized for speed.
Changes in reSID version 0.2
----------------------------
The implementation of the Envelope Generator has been rewritten to handle
the infamous ADSR delay bug. All known envelope related bugs have been
corrected.
The maximum filter resonance is lowered to keep the filter stable.
The reSID API has been simplified. Reading write only registers is allowed.

@ -0,0 +1,26 @@
This is reSID, a reverse engineered software emulation of the MOS6581 SID
(Sound Interface Device). This chip was used in the Commodore 64 computer.
reSID is free software. See the file COPYING for copying permission.
reSID is a C++ library containing a complete emulation of the SID chip.
This library can be linked into programs emulating the MOS6510 MPU to
play music made for the Commodore 64 computer. reSID has been successfully
linked into VICE, a full-fledged Commodore 64 emulator, and SIDPLAY, a
popular SID tune player. The VICE home page is:
http://www.viceteam.org/
A patch for SIDPLAY can be found on the SIDPLAY home page:
http://www.geocities.com/SiliconValley/Lakes/5147/
Various SID emulators exist, however reSID should still be of great
interest to Commodore 64 nostalgics. The emulator engine is cycle-based,
emulating the internal operations of the SID chip. SID's audio filter is
modeled as an actual two-integrator-loop biquadratic filter circuit.
The engine has been developed based on available information on SID, sampling
of the OSC3 and ENV3 registers, filter theory, and meticulous testing.
In short, a scientific approach has been taken to model the SID chip as
accurately as possible.
To our knowledge reSID is by far the most accurate SID emulator ever created.
This comes at a price; what is considered a fairly fast CPU at the time of
this writing is needed to run the emulator.

@ -0,0 +1,87 @@
reSID was written by Dag Lem.
The project was started after reading an interview with Bob Yannes, the
head engineer of the SID chip. This interview was made by Andreas Varga,
with additional questions from Linus Walleij. The interview can be found on
the SID Homepage:
http://stud1.tuwien.ac.at/~e9426444/sidpage.html
The reverse engineering of the SID chip would not have been possible without
this interview.
Also found on the SID Homepage is an examination of the SID noise waveform
written by Asger Alstrup. This article was of great help in reverse
engineering the complete algorithm for the noise waveform.
Lars Haugseth has been invaluable in the testing of reSID.
In a matter of hours after hearing about my project, he had completed a 6510
disassembler in Perl. The importance of this was not evident to me until the
next day when he had disassembled the music routine for "Outrun Remix" by
Geir Tjelta, made some changes to it, reassembled, and produced a file
containing 48K of SID register values.
The first tests of reSID were run on this file.
With an exceptional memory of Commodore 64 tunes Lars Haugseth has pointed
out several errors in reSID that are now corrected.
Morten Rollan and Kåre Gunnar Nesheim have provided interesting and insightful
information regarding digital filters. Kåre Gunnar Nesheim has also kindly
provided a 1901 monitor and a C64C from his private computer museum. His C64C
was used to measure the MOS8580 filter cutoff characteristics.
VICE has been an inspiration for this project, and testing of reSID has
been greatly simplified by VICEs -sounddev dump option. Teemu Rantanen
has written support for reSID in VICE, making it possible to choose at runtime
between his excellent SID emulation and, given enough CPU power, the reSID
emulator engine. Tibor Biczo, Andreas Boose, and André Fachat have provided
combined waveform samples for 6581 R1, R3, R4, and 8580 R5 SID chips.
The VICE home page is found at:
http://www.viceteam.org/
The author of SIDPLAY, Michael Schwendt, has implemented a patch to link
libsidplay with reSID. Using his excellent tune player he has pointed out
several bugs in reSID. He has also provided invaluable information related to
the bugs as basis for further investigation. Most notably, the infamous ADSR
delay bug, of which I was previously unaware, has finally been understood and
is now correctly implemented in reSID. The SIDPLAY home page is found at:
http://www.geocities.com/SiliconValley/Lakes/5147/
A bug report from Daniel Lacasse led to the discovery of a previously unknown
SID bug, the ADSR boundary bug.
Anders Ødegård has explained aspects of analog electronics and audio
equipment.
Bob Yannes has patiently answered questions and has provided lots of
technical information on the SID filter. Thank you Bob!
Julius O. Smith III has provided much of the theoretical basis for the
audio resampling with his "Digital Audio Resampling Home Page":
http://www-ccrma.stanford.edu/~jos/resample/
Hársfalvi, Levente has made a thorough investigation of the DC levels
in the MOS6581 chip. His results are available in C= Hacking Issue #20,
and form the basis of DC corrections in reSID. Levente found that each
voice independently contributes to the DC level in the mixer. Note
that some of the conclusions in the article are incorrect, as the
maximum and minimum voice output levels are interchanged.
The author of SIDPLAY2, Simon White, has given a lot of feedback on
reSID. Most importantly he found and fixed a bug in the fast clock
version of the ADSR emulation.
Laurent Ovaert found and fixed a bug in the fast version of the noise
register shift routine.
Andreas Dehmel has reported all sorts of initialization and overflow
errors.
Laurent Ganier demonstrated two crucial techniques for vectorizable
filter convolution in a patch. Firstly, he made the filter elements
correspond to the sampling frequency, allowing the linear
interpolation to be factorized out from the convolution. Secondly, he
duplicated elements in the sample ring buffer, achieving contiguous
storage of the samples. The current resampling implementation builds
on these ideas, improving on them by using shifted filter tables for
generalization and accuracy.
Finally I would like to thank my business partner Stian W. Arnesen for
putting up with all this nonsense.

@ -0,0 +1,8 @@
* Determine the characteristics of the SID filter integrators. Spice
may perhaps be used to simulate the filter circuit.
* Write documentation. Possibly a paper describing how SID was reverse
engineered.
* Implement a SID tune player. A PSID player, VSID, is partly
implemented in VICE.

@ -228,7 +228,7 @@ void Filter::writeFC_LO(reg8 fc_lo)
void Filter::writeFC_HI(reg8 fc_hi) void Filter::writeFC_HI(reg8 fc_hi)
{ {
fc = ((fc_hi << 3) & 0x7f8) | (fc & 0x007); fc = (((unsigned int)fc_hi << 3) & 0x7f8) | (fc & 0x007);
set_w0(); set_w0();
} }

@ -76,7 +76,7 @@ void WaveformGenerator::writeFREQ_LO(reg8 freq_lo)
void WaveformGenerator::writeFREQ_HI(reg8 freq_hi) void WaveformGenerator::writeFREQ_HI(reg8 freq_hi)
{ {
freq = ((freq_hi << 8) & 0xff00) | (freq & 0x00ff); freq = (((unsigned int) freq_hi << 8) & 0xff00) | (freq & 0x00ff);
} }
void WaveformGenerator::writePW_LO(reg8 pw_lo) void WaveformGenerator::writePW_LO(reg8 pw_lo)
@ -86,7 +86,7 @@ void WaveformGenerator::writePW_LO(reg8 pw_lo)
void WaveformGenerator::writePW_HI(reg8 pw_hi) void WaveformGenerator::writePW_HI(reg8 pw_hi)
{ {
pw = ((pw_hi << 8) & 0xf00) | (pw & 0x0ff); pw = (((unsigned int)pw_hi << 8) & 0xf00) | (pw & 0x0ff);
} }
void WaveformGenerator::writeCONTROL_REG(reg8 control) void WaveformGenerator::writeCONTROL_REG(reg8 control)

@ -1,5 +1,30 @@
/*
Arduino SID
Copyright (c) 2015 Frank Bösing
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
The helix decoder itself as a different license, look at the subdirectories for more info.
Diese Bibliothek ist freie Software: Sie können es unter den Bedingungen
der GNU General Public License, wie von der Free Software Foundation,
Version 3 der Lizenz oder (nach Ihrer Wahl) jeder neueren
veröffentlichten Version, weiterverbreiten und/oder modifizieren.
Diese Bibliothek wird in der Hoffnung, dass es nützlich sein wird, aber
OHNE JEDE GEWÄHRLEISTUNG, bereitgestellt; sogar ohne die implizite
Gewährleistung der MARKTFÄHIGKEIT oder EIGNUNG FÜR EINEN BESTIMMTEN ZWECK.
Siehe die GNU General Public License für weitere Details.
Sie sollten eine Kopie der GNU General Public License zusammen mit diesem
Programm erhalten haben. Wenn nicht, siehe <http://www.gnu.org/licenses/>.
Der Helixdecoder selbst hat eine eigene Lizenz, bitte für mehr Informationen
in den Unterverzeichnissen nachsehen.
*/
#include "reSID/envelope.cc" #include "reSID/envelope.cc"
#include "reSID/extfilt.cc" #include "reSID/extfilt.cc"

28
sid.h

@ -1,4 +1,30 @@
/*
Arduino SID
Copyright (c) 2015 Frank Bösing
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
The helix decoder itself as a different license, look at the subdirectories for more info.
Diese Bibliothek ist freie Software: Sie können es unter den Bedingungen
der GNU General Public License, wie von der Free Software Foundation,
Version 3 der Lizenz oder (nach Ihrer Wahl) jeder neueren
veröffentlichten Version, weiterverbreiten und/oder modifizieren.
Diese Bibliothek wird in der Hoffnung, dass es nützlich sein wird, aber
OHNE JEDE GEWÄHRLEISTUNG, bereitgestellt; sogar ohne die implizite
Gewährleistung der MARKTFÄHIGKEIT oder EIGNUNG FÜR EINEN BESTIMMTEN ZWECK.
Siehe die GNU General Public License für weitere Details.
Sie sollten eine Kopie der GNU General Public License zusammen mit diesem
Programm erhalten haben. Wenn nicht, siehe <http://www.gnu.org/licenses/>.
Der Helixdecoder selbst hat eine eigene Lizenz, bitte für mehr Informationen
in den Unterverzeichnissen nachsehen.
*/
#include "reSID/sid.h" #include "reSID/sid.h"

Loading…
Cancel
Save