turol

Unfortunately Doom has a lot of undefined behavior (because it's a 30 year old codebase) so if you enable UBSAN you're inundated with warnings. Finding this specific needle in that haystack would take quite a lot of effort.

Hieno homma

That is a very good description of the Paranoia RPG.

> There’s probably another name for this

Race to the bottom

> Right, my humor there was that I'm assuming people specifically did non-debug flags for the build as an optimization.

It used to be the case that the presence of debug symbols would affect GCC code generation. Nowadays that should be fixed. I think it still affects the speed of compilation so if you're building the whole system from source you might want to avoid it.

I think vtune and toplev will report that as a frontend stall in their topdown metrics.

> In theory it should only be about writing a new build script (not based on `wmake` but on a real `make`). And then workout the tiny flag/preprocessor/C compiler discrepancies.

For mostly C code like the original Doom source, yes. But it looks like FastDoom people have added quite a bit of assembly. That needs to be ported to AT&T syntax. Or you need to find out if Intel syntax works in your version of DJGPP's gas. While this should work nowadays I have not tried it. Then there's other differences like Watcom mapping low memory by default into the low part of the address space but DJGPP needing explicit mapping or access.

The Voodoo 2 completely takes over display output. VESA stuff shouldn't have any effect in this case.

True. I've tried it on a Pentium 166/MMX with a Voodoo 2 and it runs about 15 fps.

If the OS doesn't provide an actual sound API developers will only write support for the most popular sound cards.

"There has grown up in the minds of certain groups in this country the notion that because a man or corporation has made a profit out of the public for a number of years, the government and the courts are charged with the duty of guaranteeing such profit in the future, even in the face of changing circumstances and contrary to the public interest. This strange doctrine is not supported by statute or common law. Neither individuals nor corporations have any right to come into court and ask that the clock of history be stopped, or turned back."

Robert Heinlein in "Life-Line"

That does not really work since the only IO was the BIOS-provided one that was 1. synchronous and 2. really slow. If you tried to do that you'd just get insanely bad pauses.