RealDOOM: Doom Ported to 16-bit Real Mode

github.com

46 points·klaussilveira··6 comments

That page doesn't say what the framerate is on an 8088. You had one job...

The indicated 6-7 MHz on 286 is impressive. I wonder how ferociously it was overclocked.

Impressive work.

> That page doesn't say what the framerate is on an 8088. You had one job...

Sure it says. Check bottom of the page.

Please tell me what on that page appears to indicate the framerate on an 8088? At the moment the link to a spreadsheet is 404, and otherwise I don't know what you're talking about.

It’s all on the spreadsheet. Use the link text to the spreadsheet, not the href (which is broken). FPS on the 8088 is sub 0.2

Very cool. I remember the FAQ of some game (maybe Raptor: Call of the Shadows) answering the question why the game is protected mode with DOS extender. It said something about such a large and complex (heh) game being "impossible" under the constraints of real mode. I had a 486 so I didn't mind, but the argument always seemed a bit dishonest to me. Like c'mon, you did it because it's easier. That's okay, ecpecially if your hardware requirements are 386+ anyway.

Also interesting that it's faster than the original on 386SX but slower on 386DX and higher. So RealDOOM is less bandwidth limited and more "ALU limited" than the original. Not entirely unexpected.

Heh, it wasnt really dishonest. Sure you can cram more in 16bit, but they had product to ship (game). Also, even on 386DX40 game was barelly playable. I had to shrink screen on larger maps to get better frame rate. It worked much better on 486SX 33.. I guess on 486DX/2 66 it was running much snappier.

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