Re: Sega Multigame - input needed!

On Mon, 13 Oct 1997 12:33:59 -0800, Clay Cowgill <clay@supra.com> wrote:

>Hi everybody--
>
>Brief status update on the Sega Multigame. There's a couple questions
>mixed in the text that I'd like input on...
>
>Hardware:
>---------
>Hardware is near final. The daughtercard uses either a 27C040 or 27C080
>(good idea, Ray). A 27C040 will be included. There are TWO 8-bit latches
>on the board. Latch "1" uses four lines for bank (game) select, the other
>four lines are for Audio selection.
>
>Question #1: Should I use one line per soundboard for selection, or encode it?
>
>ie:
>0001 = Universal Sound Board
>0010 = Space Fury Sound board
>0100 = Eliminator Sound Board
>1000 = reserved
>
>OR
>
>0000 = Star Trek
>0001 = Space Fury
>0010 = Eliminator
>0011 = Tac/Scan
>0100 = Zektor
>0101 = reserved
>...
>1111 = reserved

I wouldn't mind having the sound card selected directly as in option #1,
but I would like a different selection for the Zektor sound board since
if it's populated properly is not the same sound card as Eliminator. If
this causes you to run out of bits, then maybe a third option:

0000 = Universal Sound Board
0001 = Space Fury Sound Board
0010 = Eliminator Sound Board
0011 = Zektor Sound Board
...
1111 = reserved

I would also like a unique code for each game (I thought I read you were
doing that but now I can't find it), I don't have a StarTrek control
panel, so I'd like to use this output for to select a control panel that
will probably be remapped using a PIC.

Also (since I don't have a Star Trek control panel) actual ROM images
would be preferred, possibly with David's patches to run SC free, though
I'm such a nerd I might even program up a selectable GAL to emulate the
different SC's and use this same output to run them (or would that
scramble your background code?)

-Zonn
Received on Mon Oct 13 13:09:56 1997