tandy put their sound chip on the 1A interrupt?

[apmasell@mastodon.social]

@foone why does bold, the largest of the fonts, not simply eat the others?

[lambdageek@mastodon.social]

@foone I bet they had a debug build that did something fun inside that branch. Maybe they put some sentinel value there to track which caller of malloc was responsible.
Not sure why their compiler didn't optimize the branch away in the release build, though

[riley@toot.cat]

@apmasell Its tummy is already full.

@foone

[riley@toot.cat]

@foone I've got a copy of Sourcer lying around, if you're interested.

[foone@digipres.club]

@lambdageek well it's a compiler from 1988, it's not the best

[foone@digipres.club]

man, running on 4 hours of sleep is killing me.
I can't even remember the MS-DOS interrupt to open a file!

I know reading it is int 21 ah=3f, closing it is int 21 ah=3d, and I'll never forget that seeking is int 21 ah=42, but how do you open a file?
I mean, not the int 21 ax=6c00 way, that one is only for DOS 4.0+, and obviously a game released in 1990 isn't gonna use that.

[foone@digipres.club]

ahh, now that I've looked it up, it seems I was wrong!
closing isn't 3D, that's 3E! 3D is open!

no wonder I couldn't remember it, I had it confused with another call

[foone@digipres.club]

looking it up took less than 10 seconds, but that's 10 seconds I'll never get back.

[foone@digipres.club]

what the fuck do you mean that carmen.dat is opened on the first call to finish_draw_maybe()?

like, I know there's a "maybe" in that name, but it's not THAT big of a maybe.

[scottmichaud@mastodon.gamedev.place]

@foone The hit single from Carmen Dat Jepson... Call My Maybe().

[foone@digipres.club]

oh thank god, that was a bit of confusion from manually tracking stack frames.
it actually LoadDatFile, which makes a HELL of a lot more sense

[foone@digipres.club]

@scottmichaud hah!
I should get a sticker for my laptop that says "I'd rather be listening to Carly Rae Jepsen's hit 2015 album Emotion than this!"

[foone@digipres.club]

darn. Compiler Explorer doesn't support MS C Compiler 5.1 from 1988. Guess I gotta spin up an emulator again

[foone@digipres.club]

the annoying thing is that MS C Compiler 5.1 is the most mundane-ass DOS application. If I had a 32bit windows install rather than 64bit, it would probably just run natively on my system

[foone@digipres.club]

I'm gonna build an m.2 addon that's just a drop in x86 coprocessor. I know a lot of computers that could use an x86 processor these days.

[foone@digipres.club]

it's like a Super Game Boy, but for your PC! Plug in this extra hardware, and now your system is compatible with a ton more software!

[foone@digipres.club]

note to self: figure out how Ghidra fidb works, so I can apply it to MSC5.1 (which was sadly overlooked by the developers of ghidra)

[foone@digipres.club]

note to self:
maybe do it for everything MS-DOS.

[timixretroplays@digipres.club]

@foone por que no los MS-DOS?

[foone@digipres.club]

okay don't change that byte, GOT IT.
I think I failed to load the cursor, which caused it to corrupt the mouse cursor catastrophically