[Coco] Coco compatible monitors...

[John Kent]

On 6/07/2011 11:46 PM, Mark McDougall wrote:
> On 3/07/2011 8:26 PM, John Kent wrote:
>
>> One solution maybe to replace the GIME chip with an FPGA.
>
> Another option is to snoop GIME & video memory accesses on the 
> cartridge connector and drive out VGA from an on-board frame buffer 
> via an FPGA GIME implementation.
>
> The only issue would be that the video would be asynchronous to the 
> GIME output, hence your interrupts would be out of whack with the 
> display. Unless of course you had someway of synchronising the two... 
> maybe feed the RGB syncs into the cart for example...?!?
>
> Regards,
>
I'm not sure I follow. You capture the GIME video memory accesses into a 
frame store, then spit them out at the LCD monitor rate? Does it matter 
if the interrupts aren't synchronous with the video output ? they'd be 
synchronous with the GIME chip. That would be all that matters wouldn't it ?

I not sure i grasp what you are proposing.

John.

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