[Coco] ROM Cart registers

RETRO Innovations go4retro at go4retro.com
Sun Jan 31 00:57:46 EST 2016


On 1/30/2016 11:51 PM, Darren A wrote:
> On Sat, Jan 30, 2016 at 10:46 PM, RETRO Innovations wrote:
>
>> Hmmm, that's going to be harder to emulate.  Was there any reason you did
>> not just allow direct writes to the FLASH in $c000-$dfff
>>
>
> Why do you need to emulate that?
>
> It was done because the address lines needed for decoding the cartridge ROM
> space are not connected to the CPLD. The CTS* signal is only asserted on
> reads so I needed a way to perform a write during a read.
>
>
> - Darren
>
My philosophy is to be as compatible as possible with existing 
solutions, like the CocoSDC.  Maybe it is not needed here, but I assume 
some application user will expect that the CocoSDC or SuperIDE 
programming application work on this unit as well.

Jim



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