Search found 6 matches

by Hpman
Thu Aug 29, 2019 12:01 pm
Forum: Megadrive/Genesis
Topic: Sega Tech Docs archive
Replies: 26
Views: 13735

Re: Sega Tech Docs archive

Microtec manuals for assembler and C compiler: https://www.yumpu.com/en/document/view/9309425/assembler-linker-librarian https://www.yumpu.com/en/document/view/15619344/c-compiler-mikrofh-konstanzde Mirrored the PDF files if you don't feel like registering: https://www.dropbox.com/s/p6bu5gczw06s68q/...
by Hpman
Thu May 02, 2019 4:03 pm
Forum: Cartridge
Topic: Size limits
Replies: 36
Views: 15126

Re: Size limits

Isn't 32X just masking this range? A130EC read (also write?) will just never make it to the cartridge, right?

BTW does SSF2 mapper return something when reading its range?
by Hpman
Thu May 02, 2019 3:52 pm
Forum: Cartridge
Topic: Size limits
Replies: 36
Views: 15126

Re: Size limits

What's going on exactly on A130EC with 32X? Had a quick look online, games do read there for a keyword (so effectively EC-EF), but mapper is only dealing with writes, not reads.I am missing something there ? :? Also are the standard board holes exact potitions available somewhere? Thoses are quite o...
by Hpman
Thu May 02, 2019 1:02 pm
Forum: Cartridge
Topic: Size limits
Replies: 36
Views: 15126

Re: Size limits

Yeah it looks like it's possible with the same CPLD chip (100% macrocell & pin usage, I guess it was made for the task heh). It might however not 100% replicate the SEGA mapper as there's not enough pins to catch A4-A7. This means writing 0xA13003 will be the same effect as writing 0xA130F3. Not a h...
by Hpman
Wed May 01, 2019 2:44 pm
Forum: Cartridge
Topic: Size limits
Replies: 36
Views: 15126

Re: Size limits

Happen to be disgressing a bit from NeoGeo lately and I did prototype such a Gb card for the megadrive. Wasn't aware of the !time signal back then so this test card is designed to switch banks by writing to the ROM region (0x0-0x3fffff). Was able to barely fit 7 selectable windows in CPLD, so it can...
by Hpman
Wed May 01, 2019 9:35 am
Forum: Cartridge
Topic: Sega Genesis > Arduino Comunication
Replies: 4
Views: 3398

Re: Sega Genesis > Arduino Comunication

It is fairly simple if you only need genesis > arduino communication (not bidirectionnal) You need two things wired to arduino: - a decoded write signal. A couple basic logic gates will do that for you, setup depends on the signal/memory range you are looking for. - data bus. Obvious reason, wire 8 ...