Re: multi-game proto board

At 03:00 PM 5/2/97 -0800, you wrote:
>>well, it looks like the sound part of it is still up in the air, so
>>what about a board with just the bank switched ROM, 4 player input
>>mux, level converters for a WG monitor, with adr/data buffering
>>and a couple of 22V10's wired up for io and adr decoding, then a
>>big wire wrap area to prototype the sound hardware? Bring out the
>>adr/data and strobes to vias so they're easy to get to. That way,
>>if you didn't want to mess with the sound at all you could bank
>>switch the existing sound cards with a single wire over to this
>>card which would replace the EPROM board.
>
>That's pretty much what my proto's are. There's the bank selection
>hardware (I think it fits in a 16L8) with the EPROMs, a PIC to handle the
>input mapping and NMI generation, and (tentatively) a serial port and SRAM
>for program development. The level convertors are easy enough as long as
>you can live with the pincushion distortion of the WG monitor.

So have you tried this? And all you get is the pincushion effect? No
problem with filling the entire monitor with vectors? That would make life
easier. Maybe the Sega Vector systems aren't using the full speed
capabilities of the GO-8 monitors. That would be nice.

Does anybody know exactly how fast the Sega system sweeps it's vectors? Is
this in the FAQ? Should I just read the FAQ and stop bugging you guys? Or
should I shut down Eudora and acutally get some work done today?

-Zonn
Received on Fri May 2 15:25:48 1997