21 Nov
2007
21 Nov
'07
12:32 a.m.
On 20 Nov 2007 at 13:36, Allison wrote:
I meant 6MHz, 12mhz crystal. However, even at 6 its
fast.
FYI I tried overclocking a 80C856mhz part and it was still
doing well at 8mhz but I was seeing memory timing issues.
A third-party 8MHz 80C85 existed, the Tundra CA80C85B-8CP. Here's a
databook for it:
http://www.datasheetarchive.com/pdf/972187.pdf
The nice thing is that they document the "undocumented" 8085 opcodes,
calling them "extended". They don't mention that the original Intel
8085 had the same features...
I've never had a Tundra part in my hellbox.
Cheers,
Chuck