SpritesMind.Net

I just done small hack for remapping mcd registers area 0xA120XX and now i can run mcd via 32x. Seems it works fine, so now we know for sure that it is the only reason why mcd does not work via 32x

I made some tests with 32x and is seems like 32x does not pass data lines in memory areas related to mega cd, may be it been made to avoid bus conflicts.

This seems to indicate there are actually 32 registers in CDC chip, not 16 as described in LC591x manual, and that AR register (register index) does not reset to 0x00 when register 0xF is read but when register 0x1F is read, which again contradicts LC591x manual and is kinda unexpected. Did you con...

From what i know valid cdd status shown only when RS1 != F

Hm, checksums looks ok. which one is bad?
9+F+5 ^ F = 2
9+F+1 ^ F = 6

During cd core development i spent lot of time on figuring out how mega-cd actually works, some of my conclusions reflected in mcd-verificator diagnostics tool. I share it with hope that it will help to make better CD emulators (:

https://github.com/krikzz/MEGA-PRO/tree ... erificator

https://github.com/krikzz/MEGA-PRO/tree ... erificator

Try this thing if you have some flashcart. It tests pretty much everything. If it not start at all then sub cpu or wram likely broken.

Ive done a server/client test sometime back. Although its hacky I can share some of the code if you wish. Server is written in C# and client in ASM. I used this to test streaming music files, but the connection is too slow or unreliable to work properly. Actually it should be fast enough for music ...

Really impressive! Genny doing the work of i286 machine, which is much more powerful. Blast processing he he (:

letoulousain wrote:Congratulations ! That's one small step for a man, one giant...

... leap for mankind.
my first md program was a jumping bear (:

Hi all, I'm a super magic drive owner ( 2 units 16 & 24 meg) , and playing some sms game on it . As some people know , the smd has a lack of the sms pause function , very annoying with some games. I was looking at the power base converter schematics http://devster.monkeeh.com/segapage.html and thin...

prophet36 i wonder if your memory controller enough fast for 32x? while ago i used altera DE1 for build similar thing, genesis games works fine, but 32x unfortunately not. i tried to count write/read period for 32x and looks like 32x has twice more fast r/w timings than genesis dma. my first sdram ...

i make a dump of z80 ram in sms mode and i detected code of everdrive OS in this memory. WTF i was thinking (: so now i know that z80 in sms mode not use own 8kb ram, it use m68k ram begining from upper 32k. i always was assured that z80 use own ram in sms mode. by this reason i have had a problems ...

Rawan wrote:hai all i am rawan

awesome!

notaz wrote:

HardWareMan wrote: 10. 6MBytes ROM support (for example Kabal UMK3 hack)!

Hmh, doesn't that mean it always responds above 400000, what could cause problems with SegaCD?

there is no any problems with CD unit because looks like this cart just have not any features for mega cd (!CART wire just shorted to GND)