Emulating Odyssey2 Games on GNU/Linux Topic:Odyessey 2   Date: 2004-02-14 Printer Friendly:

You can grab an emulator from here that works swimmingly. I'm using a Gentoo system. I first had to emerge allegro, wich provided me with the game toolkit needed to compile o2em:

>>> Regenerating /etc/ld.so.cache... * Caching service dependencies... * Service 'dcron' already provide 'cron'!; * Not adding service 'vcron'... [ ok ] >>> media-libs/allegro-4.0.3 merged. >>> Recording media-libs/allegro in "world" favorites file...

I also had to copy the correct makefile:

root@wrk-1 O2EM101-src # cp Makefile.linux Makefile

Now, the Makefile refers to the allegro libraries being in /usr/local/lib, but they are in /usr/lib, so, I needed to change the Makefile:

CFLAGS = -O3 -Wall -fomit-frame-pointer -I/usr/include LFLAGS = -s LIBALLEG = /usr/lib/liballeg.so.4.0 -lalleg_unsharable

Now I can make o2em:

root@wrk-1 O2EM101-src # make gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c audio.c -o audio.o audio.c: In function `audio_process': audio.c:76: warning: operation on `aud_data' may be undefined audio.c:76: warning: operation on `aud_data' may be undefined gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c cpu.c -o cpu.o gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c cset.c -o cset.o gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c keyboard.c -o keyboard.o gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c main.c -o main.o gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c table.c -o table.o gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c vdc.c -o vdc.o gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c vmachine.c -o vmachine.o gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c debug.c -o debug.o gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c timefunc.c -o timefunc.o gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c voice.c -o voice.o gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c crc32.c -o crc32.o gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c vpp_cset.c -o vpp_cset.o gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c vpp.c -o vpp.o gcc -s audio.o cpu.o cset.o keyboard.o main.o table.o vdc.o vmachine.o debug.o timefunc.o voice.o crc32.o vpp_cset.o vpp.o -o o2em /usr/lib/liballeg.so.4.0 -lalleg_unsharable gcc -O3 -Wall -fomit-frame-pointer -I/usr/include -c dis48.c -o dis48.o gcc -s dis48.o table.o -o dis48 root@wrk-1 O2EM101-src #

Let's run the emulator using the AMOK! game from here. Note that you will have to find the o2rom.bin somewhere first. You could make an image of the ROM in the system you own. This is the ROM that is inside the 8048. If that is inconvenient, here is a resource.

root@wrk-1 O2EM101-src # ./o2em AMOKPD.BIN O2EM v1.01 (October/2002) - Linux binary Freeware Odyssey2 / Videopac+ Emulator - http://o2em.sourceforge.net Developed by Andre de la Rocha Created by Daniel Boris (c)1996/1998 Starting emulation ... Initializing sound system... Sound system initialized ok Sound driver [Open Sound System] detected Using Allegro Allegro 4.0.3, Unix Odyssey2 bios ROM loaded Loading: "AMOKPD.BIN" Size: 4K CRC: 2247405E Loading voice samples... 0 samples loaded

Here is a guide to the keys:



For a fabulous tutorial on how to get this all up and running on a Windows box, see this article.