Search found 256 matches
- Wed May 07, 2008 3:26 am
- Forum: Megadrive/Genesis
- Topic: 2gen header
- Replies: 77
- Views: 52878
but why the cart doesn't die if MD wanted to read it ? Well, this is X3 for SFC. The security chip would detect longer than normal (whatever that is) linear reads from the cart pins. If detected then it would fry itself. The trick was to read smaller chunks, then read from random addresses, then go...
- Wed May 07, 2008 1:03 am
- Forum: Demos
- Topic: Unfinished platform game
- Replies: 34
- Views: 31575
- Wed May 07, 2008 12:57 am
- Forum: Megadrive/Genesis
- Topic: 2gen header
- Replies: 77
- Views: 52878
You need to do something really wrong to destroy the cartridge that way, just feed the extra HW the data it wants and you're done. The worst that can happen is a bad dump honestly (or the deletion of the data in SRAM) :/ No, the cartridge had a copy protection mechanism. If you tried to read from t...
- Tue May 06, 2008 5:56 am
- Forum: Megadrive/Genesis
- Topic: 2gen header
- Replies: 77
- Views: 52878
- Tue May 06, 2008 4:54 am
- Forum: Demos
- Topic: Unfinished platform game
- Replies: 34
- Views: 31575
- Tue May 06, 2008 4:50 am
- Forum: Blabla
- Topic: yamaha 2612 chip
- Replies: 3
- Views: 5704
- Tue May 06, 2008 3:47 am
- Forum: Sound
- Topic: Dramatic bad DAC output quality !
- Replies: 60
- Views: 47986
- Tue May 06, 2008 3:41 am
- Forum: Blabla
- Topic: yamaha 2612 chip
- Replies: 3
- Views: 5704
yamaha 2612 chip
Not sure if this is the right place for this question (again ).
Anyone have the pin out for the 2612 chip? I'm removing it from one of my model 1 systems and would like to interface it with another controller/MCU.
Anyone have the pin out for the 2612 chip? I'm removing it from one of my model 1 systems and would like to interface it with another controller/MCU.
- Mon May 05, 2008 11:38 pm
- Forum: Sound
- Topic: Dramatic bad DAC output quality !
- Replies: 60
- Views: 47986
That distortion is caused by one thing called leakage, value written to DAC will go silence in a short period of time... on emulator it doesn't happen that's why speech sounds better... on real HW instrument like cymbals sound a bit better because of this. I take it you're referring to "return to z...
- Mon May 05, 2008 4:41 am
- Forum: Sound
- Topic: Dramatic bad DAC output quality !
- Replies: 60
- Views: 47986
The only thing I can think of is the response time of the YM chip for the DAC write. I've read that two fast of writes to the DAC will be ignored. Some external chips have a way of slightly delaying a processor when it writes to a port (not sure of the 68k has something similar to /RDY). It's possib...
- Fri May 02, 2008 2:34 pm
- Forum: Sound
- Topic: how can i do music on megadrive?
- Replies: 288
- Views: 552047
A byte really isn't enough for a decent instrument sample. I used a word when I did some MIDI instruments on the Amiga. Most of my instruments weren't 64K long, but most WERE longer than 256 bytes. You probably could do some really simple instruments in 256 bytes, though. no no, I mean the upper by...
- Fri May 02, 2008 4:02 am
- Forum: Sound
- Topic: how can i do music on megadrive?
- Replies: 288
- Views: 552047
Why is there a need for such thing ? Additional timing ? Oh - just for frequency scaling. One way is to use two bytes. The low byte acts as the float part and the upper byte is the whole part. Just add the whole part/byte to the wave/sample pointer. That way you don't have to store multiple samples...
- Wed Apr 30, 2008 2:45 am
- Forum: Sound
- Topic: how can i do music on megadrive?
- Replies: 288
- Views: 552047
2 year old topic.... so many memories.... I wrestled with 6KHz 2Ch playback code and now I have (or had) 56KHz 2Ch code, plus music and sound effects !!! I said "I will I will", and I now, I've done it !!! (it took quite some time though). I feel good :) TmEE: Hey - do you have enough cycles left o...
- Wed Apr 30, 2008 2:38 am
- Forum: Tools
- Topic: Interest in High Level Scripting Language for Sega CD Dev?
- Replies: 11
- Views: 12909
Hmm, I like the idea. I've actually been considering the possibility of a SCUMM-style system for Sega CD - would this be something similar, or would it be more low-level? There is already a SCUMM interpreter for the SegaCD - it's running Monkey Island :wink: I did some little work on the TGCD Loom ...
- Sun Apr 27, 2008 3:48 am
- Forum: Blabla
- Topic: Yamaha internal waveform info
- Replies: 17
- Views: 18827