Search found 3 matches

by RavenWorks
Sun Mar 24, 2019 2:33 pm
Forum: Mega/SegaCD
Topic: Compiling a bootable ISO?
Replies: 5
Views: 10116

Re: Compiling a bootable ISO?

Oh, shoot, so it's actually a little of both then? The BIOS automatically loads some code for both CPUs, but it's limited to a small enough amount that the real bulk of the *actual* program needs to then be loaded BY that initial program? (What is the actual limitation that determines how much can b...
by RavenWorks
Sun Mar 24, 2019 12:58 am
Forum: Mega/SegaCD
Topic: Compiling a bootable ISO?
Replies: 5
Views: 10116

Re: Compiling a bootable ISO?

OK, that makes sense! So the idea really is basically "compile some assembly, append the result into the initial Main CPU program (as "data"), then DMA it into the Sub CPU's program memory"? (Does the Sub CPU always jump execution to a certain address when it gets back access to its program memory, ...
by RavenWorks
Sat Mar 23, 2019 5:49 pm
Forum: Mega/SegaCD
Topic: Compiling a bootable ISO?
Replies: 5
Views: 10116

Compiling a bootable ISO?

Hello! Newbie question here—I've written homebrew for other systems before, even dual-CPU ones like the DS, but I'm at a loss figuring out where to start with writing a little Sega CD demo that will compile to a bootable ISO (with custom code for both CPUs). I gave BasiEgaXorz a shot, and that basic...