tandy put their sound chip on the 1A interrupt?

[foone@digipres.club]

@StompyRobot "human" is in massive air quotes here, I'm not terribly human in the first place, but you know what I mean. The difference between lived experience and a clock.

[stompyrobot@mastodon.gamedev.place]

@foone well I'm a robot!

I'll allow "colloquial meaning of next day" though. Colloquial is such a useful word!

[foone@digipres.club]

@StompyRobot good point. "lived experience" doesn't exactly work if you're not technically alive.

[foone@digipres.club]

PUSH ES
PUSH AX
RETF

why must you hurt me, carmen sandiego?

[philpem@digipres.club]

@foone that is definitely a "masochist or masochistic compiler writer" instruction sequence

[foone@digipres.club]

I'm confused by the graphics detection routines. I thought it was returning 0 for "no graphics" or something, but it turns out 0 means MCGA.
So the GraphicsMode enum goes:
0: MCGA
1: CGA
2: Hercules
3: EGA
4: Tandy
5: VGA
6: ???

[foone@digipres.club]

I don't think there's any reason why this would support SVGA. It always use 320x200 at a maximum of 256 colors. VGA is more than enough to handle it

[jbqueru@fosstodon.org]

@foone That's called Manhattan distance.

[foone@digipres.club]

@jbqueru which is famously not how planes navigate

[foone@digipres.club]

being able to do a textual find-replace on VRAM is a weird but occasionally useful ability

[foone@digipres.club]

I find-replaced the background from palette entry 0 to palette entry

Now I can confirm how big this image is. Previously it was set into a black background, which made it harder

[punissuer@universeodon.com]

@foone so basically, exactly as large as needs-be?

[foone@digipres.club]

@punissuer yep! as you'd expect from a game distributed on a 720kb floppy disk (or two 360kb disks)

[foone@digipres.club]

worst thing that could happen just happened:

I just realized the portable Where in the World is Carmen Sandiego? is based on the same version I'm hacking, meaning it's in-scope for me to get this, dump the ROM, and compare.

That just increased the cost and complexity of this project by bunch

[foone@digipres.club]

WAIT HOLD ALL THE PHONES.
Here's a photo from a MS-DOS version. It does that thing some companies (like Sierra) did back in the day, and included both 3.5" and 5.25" disks in the package.

BUT WHY ARE THERE SO MANY DISKS?

[foone@digipres.club]

The copy of this game I have is approximately 470kb! You could fit this on ONE disk!

[old_angry_queer@girlcock.club]

@foone so you don't know which disk carmen sandiego is on?

[foone@digipres.club]

ARG, they mislabeled this.
Admittedly, this isn't really their fault, this is confusing shit.

This is the 1992 Where in the World Is Carmen Sandiego? Deluxe, not the 1990 Where in the World Is Carmen Sandiego? Enhanced.

[vorador@techhub.social]

@foone I played this on it's day on a 286 and it came on one disk. That photo is the deluxe edition (you can see it written on the black bar below the name if you zoom)

[foone@digipres.club]

okay I finally found a boxed copy of the Enhanced 1990 DOS edition. (confusingly labeled the 1993 edition)

It comes on two 5.25" disks: presumably double-density, so that's 720kb in total.

Floppy Disk Pop Quiz: What's weird about these floppies, specifically given that this is MS-DOS version?