Search found 374 matches
- Sun Nov 27, 2011 3:33 am
- Forum: Megadrive/Genesis
- Topic: Pseudorandom generation
- Replies: 28
- Views: 20053
- Thu Oct 20, 2011 3:11 am
- Forum: Megadrive/Genesis
- Topic: Are we sure MD Z80 can't write to M68K RAM? NCS does it...
- Replies: 24
- Views: 20346
Hum, Tiido said that one of the 68k RAMs is used in SMS mode. The one with the fantom address line: IA14. If this line is disconnected (to use the real VA14, SMS mode won't work anymore). So /NOE has to work somewhat for the z80. In MD mode, swapping IA14 for VA14 has no effect. But hey, I can give ...
- Sun Jun 12, 2011 9:12 pm
- Forum: Demos
- Topic: MDEM's First
- Replies: 11
- Views: 9460
Oh hi! Yes that was me. Im sorry for not posting this here, but I forgot SM had an entire section dedicated for demos... -___- *hides* As for the revision glitch I dunno. I ran it on my GenIII ang MD1 and they both run fine but with a difference: My GenIII doesnt suffer from the 2-Cell VScrolling bu...
- Wed Jan 26, 2011 2:41 am
- Forum: Hardware
- Topic: New devcart
- Replies: 34
- Views: 31418
- Wed Jan 26, 2011 2:02 am
- Forum: Megadrive/Genesis
- Topic: Super Magic Drive research thread
- Replies: 133
- Views: 284333
- Wed Jan 26, 2011 12:00 am
- Forum: Megadrive/Genesis
- Topic: Super Magic Drive research thread
- Replies: 133
- Views: 284333
- Fri Nov 19, 2010 11:18 am
- Forum: Video Display Processor
- Topic: VDP registers timings
- Replies: 34
- Views: 40566
Nope, SEL1 is about the 68000 clock. <- This is how I got the synchronous overclock "SEL1 I, Switches Clk1 direction: 0 = Mclk/7, 1 = I(nput);" [ http://wiki.megadrive.org/index.php?title=HardWare:VDPpinout ] The Pixel clock characteristics (and display mode) is got from the settings of reg C: http:...
- Wed Nov 17, 2010 11:47 pm
- Forum: Blabla
- Topic: Devcart wishlist?
- Replies: 42
- Views: 27560
I wish I saw this thread earlier to take some ideas into my cartridge :lol: : http://trapalhadas.no.sapo.pt/12112010083.jpg (sorry for the huge pic) Firmwares still very incomplete :cry: , but the features are: - Up to 16MB (maybe 32) of D-RAM (Minimum bank size = 256kbytes); - USB; - MicroSD slot; ...
- Mon Aug 23, 2010 12:04 pm
- Forum: Megadrive/Genesis
- Topic: Found an interesting link - Accolade Vs Sega 1992 Law Case
- Replies: 8
- Views: 6735
Um... not the VA3, the first TMSS machine is the VA5 rev. "...modifications using standard components, at a total extra cost of approximately fifty cents." This could mean a regular 74HC chip, and indeed you can use an OR-gate (74HC32) connected to A23 and A22 and use the output as a rom chip select...
- Sat Aug 21, 2010 12:36 pm
- Forum: Hardware
- Topic: SEGA Genesis/Megadrive clone in a FPGA
- Replies: 30
- Views: 36197
- Sun Mar 21, 2010 11:55 am
- Forum: Video Display Processor
- Topic: Undocumented VDP commands
- Replies: 11
- Views: 9362
- Wed Mar 17, 2010 1:17 am
- Forum: Tools
- Topic: VRAM Breakpoints
- Replies: 2
- Views: 3438
- Wed Jan 27, 2010 1:32 pm
- Forum: Blabla
- Topic: some spare parts laying around.. so I built a flash cart
- Replies: 11
- Views: 13092
- Mon May 18, 2009 1:51 am
- Forum: Cartridge
- Topic: Documenting signal names
- Replies: 19
- Views: 28062
Don't forget to add it!
BTW, I've made a nice VDP pinout pic:
http://wiki.megadrive.org/index.php/HardWare:VDPpinout
Using info from Charles's vdppin.txt, and from the megadrive schs (and from me)
BTW, I've made a nice VDP pinout pic:
http://wiki.megadrive.org/index.php/HardWare:VDPpinout
Using info from Charles's vdppin.txt, and from the megadrive schs (and from me)
- Sun May 17, 2009 7:55 pm
- Forum: Cartridge
- Topic: Documenting signal names
- Replies: 19
- Views: 28062
Wrote the first version of the ASIC listing:
http://wiki.megadrive.org/index.php/Har ... _Sega_ASIC
I missed the "SEGA" Z80 (I don't know it's part number) , and the sega chip from VA2 MD2s
http://wiki.megadrive.org/index.php/Har ... _Sega_ASIC
I missed the "SEGA" Z80 (I don't know it's part number) , and the sega chip from VA2 MD2s