Intel 8085 - interview?
cclist at sydex.com
Fri Feb 9 15:24:11 CST 2018
On 02/09/2018 12:26 PM, allison via cctalk wrote:
> IBM PC early also did that... other vendors of the 8088 didn't work
> in the 64K and early 256K IBM PCs due to a slight timing variation
> that reputedly intel helped design in. One gate fixed it but it was
> undocumented thing you could getaway with only with Intel 8088s.
Hmm, must have been *very* early PCs, as mine had an AMD 8088 in it--but
wasn't AMD a licensee of the Intel part? But then, so was NEC.
I think IMSAI used the "different" NEC 8080s in their floppy controller,
as they were inexpensive (because of the incompatibility) and in the
particular application, it didn't matter.
I do recall very early 8085s having a "reset" bug, necessitating some
external glue, but it's been too long for me to remember the details.
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