[Coco] How does the cartridge port work, anyway?

John W. Linville linville at tuxdriver.com
Thu Feb 21 19:58:13 EST 2013


On Fri, Feb 22, 2013 at 12:28:14AM +0000, Phill Harvey-Smith wrote:

> Well my pre-production prototype DragonMMC cards do that, they have
> a 32K SRAM onboard. I mirror the system roms into this and then
> patch them so that cassette (and later disk) commands access the
> SD/MMC card instead of tape.
> 
> Means you can have a cas file on the card and load it in 2-5 seconds
> instead of 2-5 minutes :) Also means you can softload cartridge
> images from the MMC into the ram too.
> 
> The other advantage with doing this is that you can have RAM on a
> Dragon or CoCo 1/2 that will run at 1.7MHz

It sounds like you need to get these into production... :-)

-- 
John W. Linville		Someday the world will need a hero, and you
linville at tuxdriver.com			might be all we have.  Be ready.



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