Doom8088 in everybody's favourite video mode: CGA 320x200 4 colors.

Oh my god I'm going to try this out immediately. I can't wait to see what happens on my 12MHz 286.

Frenkel wrote on 2024-12-26, 21:40:

Doom8088 in everybody's favourite video mode: CGA 320x200 4 colors.

My eyes... my EYES!!! 😁

Thank you Frenkel! i did not know the proyect! finally a dream came true, and i can play doom in a lovely Toshiba t3100e/40, 8mhz 286, 1mb ram, orange plasma CGA screen

Really nice all. Also the cga version. I wonder whether that 16colors composite cga mode would also work or would it be too slow? As mentioned earlier in this thread instead of remapping all 256 colors to the cga palette, a redesign of the textures could greatly improve the cga appearance at the costs of simple flat one color textures comparable with wolf3d. Simplier but maybe more comfortable for the eyes 😀

Frenkel wrote on 2024-12-26, 21:40:

Doom8088 in everybody's favourite video mode: CGA 320x200 4 colors.

I have a question, is possible to not loading textures? just diferent flat colors and sprites? in a plasma CGA display like mine will look much much better, because the dithering is made in real time
thanks

Marco wrote on 2024-12-29, 12:32:

Really nice all. Also the cga version. I wonder whether that 16colors composite cga mode would also work or would it be too slow? As mentioned earlier in this thread instead of remapping all 256 colors to the cga palette, a redesign of the textures could greatly improve the cga appearance at the costs of simple flat one color textures comparable with wolf3d. Simplier but maybe more comfortable for the eyes 😀

Yes, i will love to photoshop all textures to be more nice to cga palette, in my case b/w one. Just flat colors

For example, this textures edited will look much better in CGA

The problem is the super low resolution, i cant see anything on screen... jaja

Yessss that’s indeed what I was talking about. Thanks for the example.

The resolution itself should be 320x200 as for vga but only 4 colors. Only for 16 colors you get 160x100 iirc.

Wiki:
„A number of official and unofficial features exist that can be exploited to achieve special effects.
In 320 × 200 graphics mode, the background color (which also affects the border color), which defaults to black on mode initialization, can be changed to any of the other 15 colors of the CGA palette. This allows for some variation, as well as flashing effects, as the background color can be changed without having to redraw the screen (i.e. without changing the contents of the video RAM).“

The composite mode is I think rarely something a lot of people could use as it requires special displays. Or just Dosbox but that’s not the target here 😀

Marco wrote on 2024-12-29, 14:37:

Yessss that’s indeed what I was talking about. Thanks for the example. […]
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Yessss that’s indeed what I was talking about. Thanks for the example.

The resolution itself should be 320x200 as for vga but only 4 colors. Only for 16 colors you get 160x100 iirc.

Wiki:
„A number of official and unofficial features exist that can be exploited to achieve special effects.
In 320 × 200 graphics mode, the background color (which also affects the border color), which defaults to black on mode initialization, can be changed to any of the other 15 colors of the CGA palette. This allows for some variation, as well as flashing effects, as the background color can be changed without having to redraw the screen (i.e. without changing the contents of the video RAM).“

The composite mode is I think rarely something a lot of people could use as it requires special displays. Or just Dosbox but that’s not the target here 😀

For what i check, will be 240x160

For example, title screen, i think will look much better the one from 32x, resized to 240x160 and lowered to 4 colors

Frenkel wrote on 2023-12-10, 21:33:

To celebrate Doom's 30th anniversary, here's a port of Doom for 16-bit DOS computers: Doom8088. […]
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To celebrate Doom's 30th anniversary, here's a port of Doom for 16-bit DOS computers: Doom8088.

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.
Doom8088 is a port for PCs with a 16-bit processor like an 8088 or a 286, with 1 MB of RAM and with VGA or MCGA graphics. It's based on GBADoom.

To make it work on a 16-bit processor with 1 MB of RAM, some sacrifices had to be made. This means only Doom 1 Episode 1 is supported (expect E1M6), no texture mapped floors and ceilings, no light diminishing, no music, no saving and loading, no multiplayer, no PWADs, no mouse and joystick support. One fixed resolution, PC speaker sound effects, rotating overlaid automap, only demo3 is in sync.

Doom8088 and RealDOOM., "one of the most important milestone in Doom porting ever" 😜

Hello! Amazing work!
I have a system with an intel 8088-2, 256KB RAM, another 256KB of battery backed NVRAM for storage (via virtual floppy), and a single sided 3.5” floppy drive.. the biggest problem may be that it can only boot CP/M-86.. what are my chances of getting anything resembling doom on it?

Very impressive!