Doom8088: Texture mapped walls and colored floors and ceilings

[@CathodeRayKobold]

I love watching the textures slowly grow into view from a blob like an unusually artistic slime mold.

[@basicallysnake]

It looks like a Commodore 64 game and I love it

[@enimapodofficial6618]

Bless your witchcraft. Ngl this looks great even with solid-color floors; If ya wanted to put in graphics settings, having the ability to swap between this solid-color-flats mode and actual flats would probably be neat for performance options.

[@papeleradereciclaje4375]

Looks a bit like the SNES port

[@LaGamerLia666]

doom running on a processor 7 years older than my mom impressive

[@average_ms-dos_enjoyer]

That is shockingly playable, nice work so far. Any idea what's causing those sudden halts?

[@DookNookim]

It's probably caused by loading a new texture or sprite from the old 100 MB hard disk.

[@Aeduo]

@@DookNookim Could it be possible to just preload everything a map needs at loading time (obviously lengthening the loading time) or would it just not all fit in to memory at once? I assume this is hard-limited to 640K? Not sure if EMS or XMS are on the table but maybe swapping in from that would be viable and faster than loading off disk.

[@DookNookim]

@@Aeduo I guess I could preload some wall textures while there is still some free memory. Doom8088 supports 64K of EMS, but it doesn't do bank switching, just like Commander Keen 4. Keen 4 also supports upper memory blocks and it's on the to-do list to add UMBs to Doom8088. Wolfenstein 3D does EMS and XMS swapping. I might take a look at that code someday.

[@CathodeRayKobold]

Probably the fact that he's playing on an intel 8088. /s

[@DookNookim]

@@Aeduo In the latest version the WAD file is loaded into XMS memory and now the sudden halts are gone.

[@Gh0sTlyD3th]

Is this based on the SNES texture and sprite work? It was the first thing I could think that it resembled with the missing floor and ceiling textures. It looks great! I'd love to give this a shot on my original IBM PC-XT

[@DookNookim]

The graphics are based on the original DOS artwork. To take up less memory, every fourth column is duplicated four times. So column 1, 2, 3 and 4 are the same, column 5, 6, 7 and 8 are the same, etc. The sprites are more important than the walls, so they have a bit more detail. But to reduce memory usage, column 1 and 2 are the same, 3 and 4 are the same, etc. The floor and ceiling textures are missing, because it's faster not to draw them. The game is already slow enough :) A CGA version is on the to-do list.

[@bollux78]

is some version/configuration playable on an actual 8088?

[@DookNookim]

With an acceptable frame rate? I don't know. A 80x100 136 color CGA version that has less to render, is on the to-do list

[@jpc-273]

Are there plans for a port for Amiga and Atari ST?

[@DookNookim]

Not by me, but the source code is available, so someone else could do it.

[@DookNookim]

I've just uploaded a video of Doom timedemo 3 running on an Amiga 500.

[@antoniosethias9948]

Wotk with 1MB of RAM ?

[@DookNookim]

It's a bit hard to see, but if you look closely at 0:03 you'll see it uses 358496 bytes of conventional memory and 65536 bytes of expanded memory, so 358496 + 65536 - 16 = 424016 bytes in total.

[@antoniosethias9948]

I'm thinking about reconnecting my 286 with 1MB of RAM. I think he can have expanded memory.

[@DookNookim]

@@antoniosethias9948 Doom8088 will run without expanded memory.