[Coco] Coco flash cartridge

[Steve Bjork]

Mark,

On a CoCo 3, the ROM Pak could be up to 32k address space and is 
anyway to support that size of cart?  This would let us write games 
like Rampage for your Flash Cartridge.

After looking over your design, the A14 line could be connected to a 
little logic (think NAND gate for U3) for a 16k/32k switch to support 
both 16k and 32k addressing.

On side note, there were some 64k games that used a bank switch, but 
no need to try to support them.

Steve (6809er) Bjork

At 08:21 AM 9/19/2007, you wrote:

>Hi all,
>
>Today I whipped up a quick 2-sided PCB for a Coco flash cartridge - 
>for lack of anything better to do with the remains of a prototype 
>panel. With any luck, it'll go out sometime next week. Not sure how 
>many I'll make - depends  on how much spare room is on the panel, 
>but perhaps only a handful at this point...
>
>If anyone would care to review/comment, the following link has the 
>schematic and PCB.
>
><http://members.iinet.net.au/~msmcdoug/coco/coco.htm>
>
>I'm yet to check the dimensions of the PCB around the connector - 
>any idea where I can find that information?
>
>And OT: also on the panel will be some Amiga-PS/2 adapter boards if 
>anyone happens to be interested...
>
>Regards,
>
>--
>|              Mark McDougall                | "Electrical Engineers do it
>|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"