Search found 4 matches

by RetroHawk
Fri Jun 17, 2022 2:00 pm
Forum: Homebrew software and hardware (excluding games)
Topic: Assembling Multicart ROM Image
Replies: 5
Views: 2168

Re: Assembling Multicart ROM Image

Quick followup. The ROM files you provided worked great, thanks. The only issue I had was that I initially left WE floating, and after it didn't work, I checked the datasheet, and sure enough, it needed to be HIGH for READ. So I added a 10k resistor to Vcc and it worked a treat. I only have 16 games...
by RetroHawk
Fri Jun 17, 2022 11:44 am
Forum: Homebrew software and hardware (excluding games)
Topic: Assembling Multicart ROM Image
Replies: 5
Views: 2168

Re: Assembling Multicart ROM Image

Thanks for the prompt response Tom. The reason that I need to modify the address lines is because on the 040, A18 is on the same pin as A19 is on the 801. I'd like to be able to ignore the first switch (I would have only soldered in a 4-way switch if I'd realised earlier). The WE pin of the 040 is o...
by RetroHawk
Fri Jun 17, 2022 9:13 am
Forum: Homebrew software and hardware (excluding games)
Topic: Assembling Multicart ROM Image
Replies: 5
Views: 2168

Assembling Multicart ROM Image

Hi all, I'm a little slower than most, and I'm only just building my first MegaCART from the design by Cheshire Noir and Clockmeister. It turns out that the only PROMs I have are AM29F040, half the size of the 27C801 specified in the design. I figure that I can just modify the address lines that go ...
by RetroHawk
Sun Oct 16, 2016 7:47 am
Forum: Introduce yourself!
Topic: G'day from Adelaide, Australia
Replies: 2
Views: 4277

G'day from Adelaide, Australia

Hi All, I'm new to this forum, although I've lurked here occasionally. I recently attended a local Retro Computer Club meet here and had my interest in the Dick Smith Wizzard sparked again. The local club likes to have a theme for their meeting each month and this month's theme was programming in BA...