7 Jul
2000
7 Jul
'00
11:11 a.m.
Jim Battle <frustum(a)pacbell.net> wrote:
[ ... about the HP custom 8-bit microprocessor of the HP-85 ... ]
I believe that the HP 75 uses this same processor,
A CMOS version. I'm not sure if it's pin compatible. They probably
added at least one instruction, and also probably integrated some additional
as of course the
HP 86 and HP 87 do too.
The HP 83 most likely uses exactly the same processor, as the system is
fully compatible with the HP-85.
The HP-86 and -87 use different memory management, but the processor
might be the same.