Does your computer have 300 kB free contiguous memory? And is there a C compiler for it?
Then you can port Doom to it. Well, enough parts of Doom to run timedemo 3, in black and white.
32-bit CPU, 16-bit CPU. Little-endian, big-endian. It's all possible. No FPU required.
Implement i_system.h. Look at i_ibm.c and i_mac.c for examples.
| Platform | Platform specific code | Compiler | Set environment variables | Compile code | Additional information |
|---|---|---|---|---|---|
| Amiga 500 | i_amiga.c |
amiga-gcc | n/a | compa500.sh |
Experimental, might not work on a real machine |
| Amiga 500 | i_amiga.c,i_amiga_chunky.c |
vbcc | n/a | compvbcc.bat |
68000 compile doesn't work. 68020 seems to be fine |
| HP 95LX | i_hp95lx.c, i_ibma.asm |
gcc-ia16, NASM | n/a | comphp95.sh |
No status bar, also runs on HP 100LX and HP 200LX |
| IBM PC 16-bit | i_ibm.c, i_ibma.asm |
gcc-ia16, NASM | n/a | compia16.sh |
Use command line argument lcd to invert the colors |
| IBM PC 16-bit1 | i_ibm.c |
Watcom | setenvwc.bat |
compwc16.sh |
Use command line argument lcd to invert the colors |
| IBM PC 32-bit | i_ibm.c |
DJGPP | setenvdj.bat |
compdj.bat |
Use command line argument lcd to invert the colors |
| Macintosh Plus | i_mac.c |
Retro68 | n/a | CMakeLists.txt |
Experimental, might not work on a real machine |
I've forked this (and added VBCC compiler support) to experiment with chunky copper methods. Currently I've added a very dumb "Zero bitplanes, hammer colour 0 as fast as the copper will allow" method, leading to 8x1 pixels. This would work with all of OCS/ECS/AGA, but I've been unable to get VBCC to produce a working 68000 executable (in fact, the compiler flat-out aborts for a 000 compile at higher optimization settings. 020 seems to work fine though.)
Stock A1200 in Winuae gets about 8-9 FPS.
TODO:
- Re-add status panel
- Add 8 by Y max performance mode (need to read up on copper skips and loops)
- Add 4 by 4 mode
Swiz
Footnotes
-
Two compilers can build the IBM PC 16-bit port. Gcc-ia16 produces faster code than Watcom. The static code analysers of both compilers detect different issues. ↩