[Coco] CoCo3FPGA Documentation

[Mark McDougall]

Becker, Gary wrote:

> That board seems interesting. Does it have SRAM or SDRAM? I have not
> tried any SDRAM interfacing. But there are some decent boards available
> with only SDRAM.

Only SDRAM. Like you, I've only interfaced to SRAM in the past, but with 
this board I'll have to bite-the-bullet sometime soon and use SDRAM.

The other niggly with this board is the video - 240x320 (not 320x240) which 
makes it difficult to use in designs driven from the video clock - which is 
pretty much every arcade/microcomputer design that 'clones' the original 
circuit.

Unfortunately, my current FPGA development platform has 32-bit wide SRAM but 
no byte-selects wired, so I can't run your AppleFPGA project on it either. 
If I really needed them, I _could_ patch the board...

Regards,

-- 
|              Mark McDougall                | "Electrical Engineers do it
|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"