tandy put their sound chip on the 1A interrupt?

[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?

[foone@digipres.club]

I happened to look at mobygames, and noticed two interesting things.

First, the Mac version is very similar to the DOS version, other than the expected changes you'd get from it being on a monochrome system with a GUI.

But wow, that's a completely different font! Is that built into macs or something? (EDIT: @amr confirms it is)

(also, the dialogue box is top-aligned. DOS bottom-aligns them)

[amr@talksmacky.com]

@foone Yes, that's Venice, a font that early Macs shipped with.

[foone@digipres.club]

Secondly, the TurboGrafx-16 version didn't even THINK about using the same GUI!

[foone@digipres.club]

@Vorador Right! That's the 1985 port. The specific version I'm hacking on is the 1990 DOS version, not to be confused with the 1992 DOS version.

[pop_justy@social.linux.pizza]

@foone Floppy disk quiz: Correct me if I'm wrong, but I don't think MS-DOS has a media descriptor for 5.25" 720K. There's one for 1.2M, 360K, and 320K. And two more for the one side version of those last two, 180K and 160K.

But I don't recall a 720K. There's a 720K for 3.5 that's 2 sided and 9 sectors. But I don't recall a 720K for 5.25.

But I could be wrong, but that's my guess here.

[foone@digipres.club]

@amr thanks!