Search found 746 matches
- Wed Apr 12, 2017 3:24 am
- Forum: Announcement
- Topic: Future of SpritesMind
- Replies: 38
- Views: 59866
Re: Future of SpritesMind
I actually have some Mega Drive hardware business to talk with you but SpritesMind doesn't let me touch PMs at all =/ (neither read nor write) so huh is there some other way to contact you? Why so? I was able to use PMs right after register. Did you try to set it here? http://savepic.ru/13543419.png
- Tue Apr 11, 2017 10:15 am
- Forum: UMDK
- Topic: MD hangs after playing any PCM file
- Replies: 69
- Views: 129635
Re: MD hangs after playing any PCM file
Oh, you're right. My bad.Jorge Nuno wrote:HardWareMan VDP pin 118
- Tue Apr 11, 2017 1:47 am
- Forum: UMDK
- Topic: MD hangs after playing any PCM file
- Replies: 69
- Views: 129635
Re: MD hangs after playing any PCM file
Well I see the pin is CAS0 on the VDP, but on cart and expansion slot diagrams around the place it seems to be listed as OE. Maybe I'll randomly switch between the two and everyone will have to guess what I'm on about. Here, I'll put it closer to you. http://savepic.ru/13550680m.gif http://savepic....
- Sun Apr 09, 2017 6:17 am
- Forum: UMDK
- Topic: MD hangs after playing any PCM file
- Replies: 69
- Views: 129635
Re: MD hangs after playing any PCM file
Yes, it is bus metastability. Since M68K itself can't do that after AS asserting (@design), so this is chipset related problem. Oh, deja vu, is we already discussed it before? Anyway, yes, there is a problem. Since SRAM or ROM can handle with this by that fact that those metastabilities ends before ...
- Sun Apr 09, 2017 5:48 am
- Forum: Announcement
- Topic: Future of SpritesMind
- Replies: 38
- Views: 59866
Re: Future of SpritesMind
Although I don't know the whole inside SM but I totally agree with you. Same thing happens with me but without having my own forum - I realized long time ago that I can't handle it because sufficient of time. I'm will not make any game or tool because I'm hardware guy. I'm ready to share what I know...
- Fri Mar 31, 2017 2:59 am
- Forum: Hardware
- Topic: What would be a DIY dev kit ?
- Replies: 13
- Views: 19230
Re: What would be a DIY dev kit ?
In theory you could do even better than that if there's enough spare room in the FPGA. 68K bus snooping is theoretically enough to mirror the VDP state into the UMDK's RAM. Of course, you would probably want to fix the DMA issues first. That is real thoughts. Most of DMA can be snooped since it use...
- Thu Mar 30, 2017 5:41 pm
- Forum: Hardware
- Topic: What would be a DIY dev kit ?
- Replies: 13
- Views: 19230
Re: What would be a DIY dev kit ?
Yes, via VDP by M68K CPU way. All I were said previously is UMDK can everything that those devkit does and even more. It is all up to software and FPGA configuration part.
- Thu Mar 30, 2017 9:41 am
- Forum: Hardware
- Topic: What would be a DIY dev kit ?
- Replies: 13
- Views: 19230
Re: What would be a DIY dev kit ?
This is my dream kit: https://www.youtube.com/watch?v=A9zQueGP4iI&index=3&list=PLJAZP-TLMPj4JnSB3XAe2k6zO11jhZ6qq I don't know its full capabilities, or whether it's able to read VRAM (probably not), but it's a simple slot-in-and-play solution that's not unlike UMDK. If one of these ever hits eBay ...
- Wed Mar 29, 2017 5:18 pm
- Forum: Megadrive/Genesis
- Topic: Undefined behavior for ABCD and SBCD
- Replies: 36
- Views: 44743
- Tue Mar 21, 2017 6:16 am
- Forum: Megadrive/Genesis
- Topic: Undefined behavior for ABCD and SBCD
- Replies: 36
- Views: 44743
Re: Undefined behavior for ABCD and SBCD
I do not understand, hasn't anyone looked at the CPU die shots yet? Basic die shots. Then, Quietust has made a great contribution by isolating the metal traces . Olivier Galibert was able to make use of this layer image, with a few corrections, to produce a full transistor-level schematic of the 680...
- Mon Feb 27, 2017 2:04 am
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2421919
Re: New Documentation: An authoritative reference on the YM2612
Hi and welcome! I am almost certain that these zig-zags are ESD protection structures. These are compulsory protection circuits that must be placed next to the pads of a silicon die. http://savepic.su/1699689.png A lot of time is passed. Now I sure that analog output have only one transistor that ca...
- Sat Jan 28, 2017 8:26 am
- Forum: Video Display Processor
- Topic: Megadrive video timings
- Replies: 123
- Views: 183853
Re: Megadrive video timings
Thank you!
- Fri Jan 27, 2017 12:47 pm
- Forum: Megadrive/Genesis
- Topic: Genesis/MD test ROMs
- Replies: 10
- Views: 13195
Re: Genesis/MD test ROMs
Thank you!
- Fri Jan 27, 2017 12:45 pm
- Forum: Video Display Processor
- Topic: Megadrive video timings
- Replies: 123
- Views: 183853
Re: Megadrive video timings
Fileden is died. Who saved those test?
- Fri Jan 27, 2017 6:39 am
- Forum: Megadrive/Genesis
- Topic: Genesis/MD test ROMs
- Replies: 10
- Views: 13195
Re: Genesis/MD test ROMs
This one? Thank you, I'll try it. But maybe it is time to make some kind set for hardware testing? Maybe we should collect already available ones and make some new one? And place it in special part of Nemesis's site, where anyone can find them.