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# 12 Acknowledgments

VICE derives from X64, the first Commodore 64 emulator for the X Window System. Here is an informal list of the people who were mostly involved in the development of X64 and VICE:

The VICE core team:

- Andreas Boose gave lots of information and bug reports about the VIC-II, the 6510 and the CIAs; moreover, he wrote several test-routines that were used to improve the emulation. He also added cartridge support and has been the main head behind the drive and datasette emulation since version 0.15. Also added several UI elements to the MSDOS, MS-Windows and Unix ports. He rewrote the C128 emulation adding Z80 mode, C64 mode and function ROM support, wrote the screenshot and the event system and started the plus4 emulator. Restructured the serial bus emulation and added realdrive and rawdrive support.
- Dag Lem implemented the reSID SID emulation engine and video hardware scaling.
- Tibor Biczo improved the MS-Windows port and plus4 emulation.
- Andreas Dehmel wrote the Acorn RISC OS port.
- Andreas Matthies improved the datasette support, the VIC20 video emulation and some ui stuff in the Win32 and MSDOS port. He also wrote the BeOS port and implemented video/audio capture support. Improved history recording/playback and implented support for video recording and netlink feature. Various bug(fixe)s. ;-)
- Martin Pottendorfer Implemented Gnome Port based on Oliver Schaertels GTK+ port Added support code for internationalization based on gettext Translated the Unix Port to German Implemented the fliplists + ui (unix).
- Spiro Trikaliotis wrote the Win32 console implementation for the built-in monitor, corrected some REU related bugs, added support for the TFE and RR-Net (cs8900a), and wrote some further patches.
- Markus Brenner added VDC emulation to x128 and added support for some more cartridges.
- David Hansel wrote the Star NL10 printer driver, implemented IEC devices and improved the tape emulation.
- Marco van den Heuvel Translated the UI to Dutch. Made the Internationalization support for the Win32 and Amiga ports. Wrote the GEORAM and RamCart cartridge code. Wrote the c64 +60K, +256K and 256K memory expansions code. Wrote the pet REU code. Wrote the plus4 memory expansions code. Made the ethernet support for the Msdos port. Maintains the RiscOS, QNX 4.x, QNX 6.x, SkyOS, Solaris, Openserver, Unixware, HPUX, GP2X, Minix 3.x, Amiga, ppc-BeOS and newly resurrected OS/2 binary ports. Added new .crt support. Added new screenshot formats. Added new sound recording support. Added SIDcart support for pet, plus4 and vic20. Improved the MMC64 emulation. Added 2 MHz mode for x128. And lots of other fixes and improvements.
- Christian Vogelgsang maintains the Mac OS X port. Added Intel Mac support and universal binary creation. Wrote the build scripts for all external Mac libraries and the bindist bundle tool. Improved the TFE chip emulation. Added some Gtk+ fixes.
- Fabrizio Gennari added some improvements to the MSDOS- and GTK port.

Former team members:

- Thomas Bretz Copyright (C) 1999-2004 Started the OS/2 port.
- Daniel Sladic Copyright (C) 1997-2001 Started the work on hardware-level 1541 emulation and wrote the new monitor introduced with VICE 0.15.
- André Fachat Copyright (C) 1996-2001 Wrote the PET and CBM-II emulators, the CIA and VIA emulation, the IEEE488 interface, implemented the IEC serial bus in `xvic' and made tons of bug fixes.
- Ettore Perazzoli Copyright (C) 1996-1999 Made the 6510, VIC-II, VIC-I and CRTC emulations, part of the hardware-level 1541 emulation, speed optimizations, bug fixes, the event-driven cycle-exact engine, the Xt/Xaw/Xfwf-based GUI for X11, a general code reorganization, the new resource handling, most of the documentation. He also wrote the MS-DOS port and the initial MS-Windows port (well, somebody had to do it).
- Teemu Rantanen Copyright (C) 1993-1994, 1997-1999 Implemented the SID emulation and the trap-based disk drive and serial bus implementation; added support for multiple display depths under X11. Also wrote `c1541'
- Jouko Valta Copyright (C) 1993-1996 Wrote `petcat' and `c1541', `T64' handling, user service and maintenance (most of the work in x64 0.3.x was made by him); retired from the project in July 96, after VICE 0.10.0.
- Jarkko Sonninen Copyright (C) 1993-1994 He was the founder of the project, wrote the old version of the 6502 emulation and the XDebugger, and retired from the project after x64 0.2.1.

External contributors:

- Michael Schwendt helped with the SID (audio) chip emulation, bringing important suggestions and bug reports, as well as the wave tables and filter emulation from his SIDplay emulator.
- Christian Bauer wrote the very interesting "VIC article" from which we got invaluable information about the VIC-II chip: without this, the VIC-II implementation would have not been possible.
- Wolfgang Lorenz wrote an excellent 6510 test suite that helped us to debug the CPU emulation.
- Giuliano Procida is the maintainer of the VICE `deb` package for the Debian distribution, and also helped proofreading the documentation.
- Marko Mäkelä wrote lots of CPU documentation.
- Chris Sharp wrote the AIX sound driver.
- Krister Walfridsson implemented joystick and sound support for NetBSD.
- Peter Andrew Felvegi aka Petschy fixed a couple of bugs in the fast serial emulation.
- Olaf Seibert contributed some PET, and disk drive patches.
- Daniel Fandrich contributed some disk drive patches.
- Heiko Selber contributed some VIC20 I/O patches.
- Steven Tieu added initial support for 16/24 bpp X11 displays.
- Alexander Lehmann added complete support for all the VIC20 memory configurations for the old VICE 0.12.
- Lionel Ulmer implemented joystick support for Linux and a first try of a SID emulation for SGI machines.
- Bernhard Kuhn made some joystick improvements for Linux.
- Gerhard Wesp contributed the `extract` command in `c1541`.
- Ricardo Ferreira contributed the `unlynx` and `system` commands in `c1541` and added aRts sound support.
- Tomi Ollila donated `findpath.c`.
- Richard Hable contributed the initial version of the REU emulation.
- Vesa-Matti Puro wrote the very first 6502 CPU emulator in x64 0.1.0. That was the beginning of the story...
- Dan Miner contributed some patches to the fast disk drive emulation.
- Frank Prindle contributed some patches.
- Peter Weighill gave many ideas and contributed the ROM patcher.
- Dominique Strigl, Craig Jackson and Lasse Jyrkinen contributed miscellaneous patches in the old X64 times.
- Per Olofsson digitalized the C64 colors used in the (old) default palette.
- Paul David Doherty wrote `zip2disk`, on which the Zipcode support in `c1541` is based.
- Robert H. Forsman Jr., Brian Totty and Robert W. McMullen provided the widget set for implementing the `Xaw` GUI.
- Shawn Hargreaves wrote Allegro, the graphics and audio library used in the MS-DOS version.
- Peter Schepers contributed a document describing the G64 image format.
- Oliver Schaertel wrote the X11 full screen, parts of custom ROM set support and 1351 mouse emulation for unix.
- Luca Montecchiani contributed a new Unix joystick driver.
- Dirk Farin rewrote the MITSHM code.
- Manfred Spraul wrote the MS-Windows text lister.
- Peter Karlsson provided the swedish UI translations.
- Paul Dubé provided the french translation for the Unix ports.
- Nathan Huizinga added support for Expert and Super Snapshot carts.
- Andrea Musuruane provided the italian UI translations.
- Flooder provided the polish translation for the Unix ports
- Michael Klein contributed the ESD sound driver, basic support for the OPENCBM library and some other patches.
- David Holz provided a label file which gives the built-in monitor the labels for the C64.
- Lasse Öörni contributed the Windows Multimedia sound driver
- Frank König contributed the Win32 joystick autofire feature.
- Philip Timmermann did a lot of research about the VIC-II colors.
- John Selck improved the video rendering and added the fast PAL emulation. Implemented new color generation based on P. Timmermanns knowledge.
- webulator provided win32 drag & drop support
- Robert Willie added some additional commands to the fsdevice emulation.
- Kajtar Zsolt wrote the IDE64 interface emulation and did some small fixes.
- ck! provided a win32 cbm character font.
- Dirk Jagdmann wrote the Catweasel sound driver.
- Maciej Witkowiak did some IDE64 and C1541 fixes.
- Roberto Muscedere improved support for REL files.
- Rami Rasanen rewrote the VIC20 sound code.
- iAN CooG contributed various small patches.
- Mike Dawson provided the GP2X port and co-maintains the GP2X ports.
- Mathias Roslund provided the AmigaOS4 port and co-maintains the AmigaOS ports.
- Eliseo Bianchi provided the italian Amiga translations.
- Johan Samuelsson provided the swedish Amiga translations.
- Harry "Piru" Sintonen provided lots of fixes and improvements for the Amiga ports.
- Ilkka "itix" Lehtoranta provided the routines for the cybergraphics support for the Amiga ports.
- Wolfgang Moser provided small optimization fixes to the GCR code.
- Peter Gordon provided support for native AmigaOS4 compiling.
- Bernd Kortz provided some fixes for ZETA and the ZETA binary package.
- Andr351 'JoBBo' Siegel provided the native morphos icons.
- Markus Stehr provided the MMC64 emulation.
- Gunnar Ruthenberg provided some VIC-II enhancements and improved the win32 port.
- Hannu Nuotio Added experimental NEOS and Amiga mouse support. Fixed mouse support for single size in unix. Fixed mouse grab and menu popup for xaw. Added new monitor commands and features. Added the memmap feature.
- M. Kiesel Added new monitor commands and features.
- Daniel Kahlin Added new monitor commands and features.
- Groepaz/Hitmen Added new more precise PAL emulation. Added support for the Action Replay 4 and StarDos cartridges.
- Ingo Korb Corrected block allocation and interleave for c1541/vdrive.
- Georg Feil Added support for toggling CB2 sound output line in the PET emulator.
- Greg King Added a working RTC to the emulation of the IDE64 cartridge.
- Thomas Giesel Added new monitor commands and features.
- Marcus Sutton Made some console, dialog and joystick fixes for the BeOS port.

- Lutz Sammer
- Ralph Mason
- George Caswell
- Jasper Phillips
- Luca Forcucci
- Asger Alstrup
- Bernhard Schwall
- Salvatore Valente
- Arthur Hagen
- Douglas Carmichael
- Ferenc Veres
- Frank Reichel
- Ullrich von Bassewitz
- Holger Busse

Last but not least, a very special thank to Andreas Arens, Lutz Sammer, Edgar Tornig, Christian Bauer, Wolfgang Lorenz, Miha Peternel and Per Håkan Sundell for writing cool emulators to compete with. `:-)`

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