It has been a long time, I am wondering what happened to these docs? Did you got some of them scanned finally or this was abandonned ?
Normally, pin 15 of 68k is feeded by pin 49 of 315-5313 through the pcb traces because the 68k clock is generated internally by 315-5313 chip....
You say that this console gives you problem with overclock. Did you at least verified if it starts fine with original mod i.e 68k pin 15...
Like I said, this pin is tied to ground by default: this makes the VDP outputs a clock to the 68k CPU by dividing input Master Clock (53 Mhz...
Game Gear also uses video mode 4, the only difference is that it has a larger color palette (wider CRAM) and specific hardware registers that GG...
Interestingly, the VDP has a pin (usually named SEL1, which is pin 48 on the 315-5313 chip and pin 129 on the various FC1004 ASICs version) which...
And here is rev2 (picture found some years ago on emu-land.net boards, courtesy of HardwareMan) [IMG] Same chips, different design. I heard the...
CD-G (maybe Audio CD as well but I'm not sure) Likely an incompatibility of Wonder Library software with some older BIOS. When this cartridge...
Thank you for testing. The counter value for the 68k test ROM confirms this is Genesis Plus GX: returned value is inconsistent between different...
This is just another evidence they are using existing emulator code (not many emulators support Pier Solar so at this point it's either...
Not sure what you are doing but disconnecting pins is not going to fix anything, you are only supposed to check if the connection with Sega ASIC...
The D/M signal that indicates if current track is audio or mode-1 data is actually output by the CDD micro-processor (LC66306A apparently on a CDX...
I wouldn't worry about coypright if I were you since if the above findings are true, it means that Hyperkin is, as suspected, selling emulator...
If you read further in the thread I linked, you will see that someone dumped the ROM from that Japanese Sega Channel and it somehow boots in...
There is necessarely a real ROM on the cartridge because this is from where the Genesis boots and run code. It contains the Sega Channel Menu...
Yes, looking at the posted pictures, this is probably what the extra connectors on dummy cart (CN-2) / DS-16 (CN-5) board are used for Everdrive...
there are still quite a few misnamed S_RES is actually M3 input for Mega Drive and is used to enable Master System (Mark III) compatibility mode,...
!TIME signal (B31) on cartridge port is indeed an additional chip select, it goes low for read/writes in the $a13000-$a130ff range and is...
Well, if you say so, it must be true then, can't argue with emulator experts :-)
I just had a look and it indeed hangs on Gens. The (technical) reason is that Gens does not properly emulate HV counter address mirroring which...
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