Search found 27 matches
- Tue Jul 28, 2020 1:14 am
- Forum: Mega/SegaCD
- Topic: mcd-verificator (CD core accuracy tests)
- Replies: 26
- Views: 173977
Re: mcd-verificator (CD core accuracy tests)
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
- Mon Jul 27, 2020 4:06 pm
- Forum: Mega/SegaCD
- Topic: mcd-verificator (CD core accuracy tests)
- Replies: 26
- Views: 173977
Re: mcd-verificator (CD core accuracy tests)
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.
- Tue Jul 14, 2020 9:26 pm
- Forum: Mega/SegaCD
- Topic: mcd-verificator (CD core accuracy tests)
- Replies: 26
- Views: 173977
Re: mcd-verificator (CD core accuracy tests)
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...
- Thu Jul 02, 2020 8:25 pm
- Forum: Mega/SegaCD
- Topic: mcd-verificator (CD core accuracy tests)
- Replies: 26
- Views: 173977
Re: mcd-verificator (CD core accuracy tests)
From what i know valid cdd status shown only when RS1 != F
- Thu Jul 02, 2020 9:57 am
- Forum: Mega/SegaCD
- Topic: mcd-verificator (CD core accuracy tests)
- Replies: 26
- Views: 173977
Re: mcd-verificator (CD core accuracy tests)
Hm, checksums looks ok. which one is bad?
9+F+5 ^ F = 2
9+F+1 ^ F = 6
9+F+5 ^ F = 2
9+F+1 ^ F = 6
- Wed Jul 01, 2020 12:13 am
- Forum: Mega/SegaCD
- Topic: mcd-verificator (CD core accuracy tests)
- Replies: 26
- Views: 173977
mcd-verificator (CD core accuracy tests)
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
- Tue Jun 30, 2020 11:17 pm
- Forum: Mega/SegaCD
- Topic: Diagnostic Software
- Replies: 1
- Views: 6858
Re: Diagnostic Software
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.
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.
- Thu Mar 02, 2017 10:53 pm
- Forum: Megadrive/Genesis
- Topic: Mega Everdrive USB programming
- Replies: 6
- Views: 6576
Re: Mega Everdrive USB programming
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 ...
- Wed Nov 13, 2013 3:11 pm
- Forum: Demos
- Topic: wolfenstein demo for sega genesis
- Replies: 364
- Views: 470665
- Sun Dec 18, 2011 1:04 pm
- Forum: Demos
- Topic: Hello World
- Replies: 5
- Views: 6778
- Sun Dec 18, 2011 12:40 pm
- Forum: Hardware
- Topic: Add a pause button to the super magic drive for sms games...
- Replies: 2
- Views: 5666
Re: Add a pause button to the super magic drive for sms game
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...
- Tue Jun 28, 2011 5:22 pm
- Forum: Hardware
- Topic: USB MegaDrive DevKit
- Replies: 32
- Views: 42157
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 ...
- Fri Feb 04, 2011 10:50 am
- Forum: Hardware
- Topic: z80 ram in sms mode (genesis)
- Replies: 2
- Views: 5780
z80 ram in sms mode (genesis)
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 ...
Re: hai
awesome!Rawan wrote:hai all i am rawan
- Sat Jan 01, 2011 3:44 am
- Forum: Hardware
- Topic: Everdrive-MD Flash Cart
- Replies: 24
- Views: 34820
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)notaz wrote:Hmh, doesn't that mean it always responds above 400000, what could cause problems with SegaCD?HardWareMan wrote: 10. 6MBytes ROM support (for example Kabal UMK3 hack)!