Search found 7 matches

by Mechanical Menace
Thu May 01, 2014 4:52 pm
Forum: Megadrive/Genesis
Topic: Assemblers You Use
Replies: 31
Views: 7476

Thanks. I was trying to use prebuilt gas binaries and those were the only 68k already available in my distro's repositories. It seems it is best to build my own for z80, so I guess I should do the same for 68k too. Tbh I'd say that whenever you're planning on coding for "bare metal," even on the ar...
by Mechanical Menace
Thu May 01, 2014 2:00 pm
Forum: Megadrive/Genesis
Topic: Assemblers You Use
Replies: 31
Views: 7476

Why does it assume the initial address is 0x8000000 and how can I fix it? Is there a better way to run gas for sega oriented development? You should really be building binutils for the m68k-elf target. (CPU family)-linux-gnu targets are expecting your binaries to be running on top of GNU/Linux, the...
by Mechanical Menace
Thu May 01, 2014 9:08 am
Forum: Sound
Topic: z80 clocks
Replies: 32
Views: 9731

There's no reason you couldn't make one decent converter that can handle any analog video signal and convert it to an image. It might be possible to do this in realtime using an off the shelf microcontroller, perhaps even on the raspberry pi. I'd personally look more at an XMOS for that. If taking ...
by Mechanical Menace
Wed Apr 30, 2014 6:14 pm
Forum: Megadrive/Genesis
Topic: Assemblers You Use
Replies: 31
Views: 7476

I use GAS for everything.
by Mechanical Menace
Tue Apr 08, 2014 5:56 pm
Forum: Megadrive/Genesis
Topic: Has anyone made an OS for the console?
Replies: 21
Views: 5411

Has anyone made an OS for the console?

Well I ended up here because I wanted to make a "retro style" PC using a 68000, realised it was cheaper to buy second hand Mega Drives than just the CPU, and couldn't bring myself to cannibalise one for the project. So now I've decided to make a custom RAM/IO expansion cart for the MD (prototype sor...
by Mechanical Menace
Mon Apr 07, 2014 2:10 pm
Forum: Cartridge
Topic: How does the cartridge slot get mapped to 0x400000?
Replies: 3
Views: 2591

Thanks, that has helped a few things make more sense.
by Mechanical Menace
Mon Apr 07, 2014 11:51 am
Forum: Cartridge
Topic: How does the cartridge slot get mapped to 0x400000?
Replies: 3
Views: 2591

How does the cartridge slot get mapped to 0x400000?

Is it something the MD does automatically when the expansion port is used and the cartridge detect pin is low or does the CD bios do it?

Sorry if this is a stupid question.