jdiffend wrote:
I'd be happy to do a board layout if I have time. Are you addressing the additional ROM space at the same location as UAE has it? I could make a new board design based on the ROM switcher I already made and add the address decoding logic and a wires for the extra address line etc. I figure one PAL would hold all the logic.
Yup..I`m building a GAL programmer now to get it all done and do the final testing.
It works pretty much as you`ve described, a jumper/switch to select either real rom or flash,another to select which is programmable at @$e00000 , and one last jumper to select either 1mb of flash or select the high or low 512k of flash if you want 2 different rom images.
The only other thing I`ve done is invert A19, so $f80000 is mapped to the lower 512kb etc, cos that way I can use the 16kb parameter block of the flash using my own nonvolatile.library for storing things like boot settings.
Get well soon, hope it wasn`t through enjoying the new year too much..
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