Dan Foster wrote:
It's not clear what the speed is (yet) -- the accelerated 816 has a -7 marking which led me to think 7 MHz, but the oscillator is 32 MHz which would mean supporting a 8 MHz processor. Or maybe the oscillator runs at 32 MHz but processor only runs at 7?
On the ZipGS the speed is set by the oscillator. The -7 on the 65816 just means that the 65816 was tested to run at 7mhz. I think that when WDC produced a batch of chips they tested them and the ones that would run at 7mhz but not at a little over 8mhz they labeled -7. The ones that ran at a little over 8mhz they labeled -8 and didn't do any more testing. I have a couple of 65816-7 and they'll run at 8mhz and no faster. Wayne