Doom was originally designed in 1993 for 32-bit DOS computers with 4 MB of RAM. It's mostly written in C code with very little assembly code. It has been ported to all kinds of systems. Usually these systems are 32-bit or more and have a flat memory model.
Doom64KB is a port for computers with only 64 KB of RAM and lots of room for ROM. It's based on Doom8088, a port of Doom for 16-bit DOS computers.
What's special?:
- Supports only Doom 1 E1M1 and E1M8
- Rotating overlaid automap
- Digital sound effects
- No music
- No texture mapped floors and ceilings
- No light diminishing
- No saving and loading
- No multiplayer
- No screen resizing
Controls:
| Action | Neo Geo |
|---|---|
| Walk | Joystick |
| Fire | B |
| Use / Sprint | A |
| Strafe | C & D |
| Weapon up | A + D |
| Weapon down | A + C |
| Menu | Start Player 1 |
| Automap | Start Player 2 |
| Automap zoom in and out | C & D |
| Automap follow mode | A |
Cheats:
| Effects | Code |
|---|---|
| Chainsaw | C, Up, Up, Left, C, A, A, Up |
| God mode | Up, Up, Down, Down, Left, Right, Left, Right |
| Weapons & Keys | Down, Down, Left, Right, Left, Right, B, A |
| Weapons | D, D, A, D, A, Up, Up, Left |
| No Clipping | Up, Down, Left, Right, Up, Down, Left, Right |
| Invisibility | A, A, A, B, A, A, C, B |
| Radiation shielding suit | B, B, D, Up, A, A, D, B |
| Auto-map | C, A, D, B, A, D, C, Up |
| Lite-Amp Goggles | Down, Left, D, Left, D, C, C, A |
| Toggle FPS counter | A, B, C, Up, Down, B, Left, Left |
Building:
| Platform | Platform specific code | Compiler | Build script | Additional information |
|---|---|---|---|---|
| Neo Geo | i_neogeo.c, i_neogev.c |
ngdevkit | bneogeo.sh |
Use command line argument -timedemo to build a version that runs the timedemo benchmark, -run to compile and run the game |