20 Oct
1999
20 Oct
'99
4:03 a.m.
>> Doing it in ttl or bit slices would still be
big, I've done that. using
>> 2900 parts(ca mid to late '70s) the CPU equivelent was over 100 chips and
>> filled 4 10x8" cards.
Note: I did this using HIGH desnity augat pannel boards (those ones with
rows of WW pins spaced alternate .200, .300 so they could take .300 dips,
.600 dips, and SIPs (resistors).
The goal was to build a 8080 that ran most of the z80 instruction set
without the EX and EXX (one set of registers) faster than a z80. The z80
by 1984 was faster than the result (more piplining, faster 2901Cs pray to
the goddess of uCode). It only wanted 1,000-3,000% more power than a
z80H.
Allison