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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:

- Ettore Perazzoli (@email{ettore@comm2000.it}) 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).
- Daniel Sladic (@email{sladic@eecg.toronto.edu}) started the work on hardware-level 1541 emulation and wrote the new monitor introduced with VICE 0.15.
- Andreas Boose (@email{boose@linux.rz.fh-hannover.de}) 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 and MS-Windows ports and the C128 Z80 implementation.
- Dag Lem (@email{resid@nimrod.no}) implemented the reSID SID emulation engine.
- Tibor Biczo (@email{crown@mail.matav.hu}) improved the MS-Windows port.
- Andreas Dehmel (@email{dehmel@forwiss.tu-muenchen.de}) wrote the Acorn RISC OS port.
- Thomas Bretz (@email{tbretz@ph.tum.de}) responsible for the OS/2 port.
- Andreas Matthies (@email{andreas.matthies@arcormail.de}) improved the datasette support and some ui stuff in the Win32 and MSDOS port. Wrote the BeOS port.
- Martin Pottendorfer (@email{Martin.Pottendorfer@aut.alcatel.at}) 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).
- Markus Brenner (@email{markus@brenner.de}) added VDC emulation to x128.

Former team members:

- Andre Fachat (@email{fachat@physik.tu-chemnitz.de}) 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.
- Teemu Rantanen (@email{tvr@cs.hut.fi}) 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 (@email{jopi@stekt.oulu.fi}) 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 (@email{sonninen@lut.fi}) 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 (@email{sidplay@geocities.com}) 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 (@email{bauec002@goofy.zdv.uni-mainz.de}) 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 (@email{gpp10@cam.ac.uk}) is the maintainer of the VICE `deb` package for the Debian distribution, and also helped proofreading the documentation.
- Marko M@"akel@"a (@email{msmakela@nic.funet.fi}) wrote lots of CPU documentation.
- Martin Pottendorfer (@email{Martin.Pottendorfer@aut.alcatel.at}) implemented the "Contents" button in the file selector and provided us with several suggestions and constant testing of constantly broken snapshots.
- Chris Sharp (@email{sharpc@hurlsey.ibm.com}) wrote the AIX sound driver.
- Krister Walfridsson (@email{cato@df.lth.se}) implemented joystick and sound support for NetBSD.
- Mattias Engdeg@^ard (@email{f91-men@nada.kth.se}) got non-default depths to work.
- Peter Andrew Felvegi aka Petschy (@email{petschy@derceto.sch.bme.hu}) fixed a couple of bugs in the fast serial emulation.
- Olaf Seibert (@email{rhialto@polder.ubc.kun.nl}) contributed some PET, and disk drive patches.
- Daniel Fandrich (@email{dan@fch.wimsey.bc.ca}) contributed some disk drive patches.
- Heiko Selber (@email{selber@fhi-berlin.mpg.de}) contributed some VIC20 I/O patches.
- Steven Tieu (@email{stieu@physics.ubc.ca}) added initial support for 16/24 bpp X11 displays.
- Alexander Lehmann (@email{alex@mathematik.th-darmstadt.de}) 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 (@email{kuhn@eikon.e-technik.tu-muenchen.de}) made some joystick improvements for Linux.
- Gerhard Wesp (@email{gwesp@cosy.sbg.ac.at}) contributed the `extract` command in `c1541`.
- Ricardo Ferreira (@email{storm@esoterica.pt}) contributed the `unlynx` and `system` commands in `c1541`.
- Tomi Ollila (@email{Tomi.Ollila@tfi.net}) donated `findpath.c`.
- Richard Hable (@email{hab@fim.uni-linz.ac.at}) contributed the initial version of the REU Emulation.
- Vesa-Matti Puro (@email{vmp@lut.fi}) wrote the very first 6502 CPU emulator in x64 0.1.0. That was the beginning of the story...
- Dan Miner (@email{dminer@nyx10.cs.du.edu}) contributed some patches to the fast disk drive emulation.
- Frank Prindle (@email{Frank.Prindle@lambada.oit.unc.edu}) contributed some patches.
- Peter Weighill (@email{stuce@csv.warwick.ac.uk}) gave many ideas and contributed the ROM patcher.
- Dominique Strigl (@email{strigl@sxb.bsf.alcatel.fr}), Craig Jackson (@email{Craig.Jackson@lambada.oit.unc.edu}) and Lasse Jyrkinen ((@email{Lasse.Jyrkinen@uz.kuleuven.ac.be}) contributed miscellaneous patches in the old X64 times.
- Per Olofsson (@email{MagerValp@Goth.Org}) digitalized the C64 colors used in the default palette.
- Paul David Doherty (@email{h0142kdd@rz.hu-berlin.de}) wrote `zip2disk`, on which the Zipcode support in `c1541` is based.
- Robert H. Forsman Jr., Brian Totty (@email{totty@cs.uiuc.edu}) and Robert W. McMullen (@email{rwmcm@orion.ae.utexas.edu}) provided the widget set for implementing the `Xaw` GUI.
- Shawn Hargreaves (@email{shawn@talula.demon.co.uk}) wrote Allegro, the graphics and audio library used in the MS-DOS version.
- Peter Schepers (@email{schepers@ist.uwaterloo.ca}) contributed a document describing the G64 image format.
- Oliver Schaertel (@email{orschaer@forwiss.uni-erlangen.de}) wrote the X11 full screen, parts of custom ROM set support and 1351 mouse emulation for unix.
- Luca Montecchiani (@email{m.luca@usa.net}) contributed a new Unix joystick driver.
- Dirk Farin (@email{farin@ti.uni-mannheim.de}) rewrote the MITSHM code.
- Manfred Spraul (@email{manfreds@colorfullife.com}) wrote the MS-Windows text lister.
- Spiro Trikaliotis (@email{Spiro.Trikaliotis@gmx.de}) wrote the Win32 console implementation for the built-in monitor and provided some further patches.

(We hope we have not forgotten anybody; if you think we have, please tell us.)

Thanks also to everyone else for sending suggestions, ideas, bug reports, questions and requests. In particular, a warm thank goes to the following people:

- Lutz Sammer
- Ralph Mason (@email{RALPHM@msmail02.liffe.com})
- George Caswell (@email{timbuktu@the-eye.res.wpi.edu})
- Per Olofsson (@email{MagerValp@goth.org})
- Jasper Phillips (@email{philljas@newt.cs.orst.edu})
- Luca Forcucci (@email{frk@geocities.com})
- Asger Alstrup (@email{alstrup@diku.dk})
- Bernhard Schwall (@email{uzs484@uni-bonn.de})
- Salvatore Valente (@email{svalente@mit.edu})
- Arthur Hagen (@email{art@broomstick.com})
- Douglas Carmichael (@email{dcarmich@mcs.com})
- Ferenc Veres (@email{lion@c64.rulez.org})
- Andrea Musuruane (@email{musuruan@biella.alpcom.it})
- Frank Reichel (@email{Frank.Reichel@forchheim.baynet.de})
- 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 H@^akan Sundell for writing cool emulators to compete with. `:-)`

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