Re: 65C02 emulation

[Charlie Springer <RAM@regnirps.com>]

On Mon, 25 Dec 2006 15:24:23 -0800, bieling@terra.es wrote
(in article <1167089063.194461.99810@h40g2000cwb.googlegroups.com>):

> I mean, although this board is not intended to be used for development,
> it looks like it's being used for.
> You may find it useful for your ARM-65c02 emulation experiments.

Jorge, thanks for the info. There are several small boards with ARM9 on them 
now. So, as soon as I get an ARM7 working I can jump from 60 MHz to 200 MHz 
for very little cost. 

Also, Atmel has announced an ARM7T chip with some FLASH and RAM for less than 
$3. I bet the parts cost for an emulation accelerator could be less than $10 
excluding the PCB (which changes so much with volume). Might as well add the 
CFcard capability and a few other goodies -- USB and Ethernet?

I was talking to an old friend who is a designer at Apple and we were 
laughing about how we could use an ARM to "bit-bang" the Apple II bus. On a 
one MHz bus we can do 200 ARM instructions per phase II cycle. He once 
completely emulated the IWM in software and says the disk I/O and such "are 
trivial". I bet I could set an interrupt on the Apple clock and meet all the 
timing requirements for read/write using ARM I/O lines run by software.

-- Charlie Springer