Hi!
On Feb 21, 2:11 pm, Steven wrote:
It's all simple economics. I'm sure Alex would be glad to put up kits or
assembled boards at 20Mhz, but they're going to be more expensive.
FWIW, the upgrade is quite simple. I just updated mine this morning (20Mhz.
crystal, 2x22pf chip capacitors and a faster Z80). Went quick and smooth and
runs like the wind!
The combination of the 20Mhz. Z80 card and my 12Mhz. ZipGSX equipped IIGS
should be quite responsive when I get that up and running.
FYI: For those planning to upgrade memory to 512k, there is something odd
going on with the ramdisk that causes BDOS errors while writing. Alex is
looking at it with a logic analyzer and I've been poring over the source code.
It's almost certainly a bug in the PCPI driver code, not the hardware.
Since the original Applicard could not be expanded past 256k of banked memory,
I'm betting that some code path in there was never exercised and has always
been faulty.
Arrrrrrggghhh!!! My FedEx package with a 512K RAM chip, a 20 MHz
Z80 CPU and a 20 MHz crystal is, according to tracking data, now in
Barrington, NJ. That's no more than 10 miles from here. BUT, it
won't be delivered until Monday. ARRRRGGGHHH...