Tektronix 4170

From: ajp166 <ajp166_at_bellatlantic.net>
Date: Sun Jan 21 12:07:50 2001

From: Richard Erlacher <edick_at_idcomm.com>


>Has anybody got good logic analyzer pictures of the signals on the S-100
>driven by the really early 8080 CPU cards? I'm looking to get a
reference


Real simple start with a schematic of the MITS 8080 or IMSAI 8080 CPU
card
so you get to see how much buffering (mostly and only) and combinational
logic applied to some signals (nearly none). Then get an 8080 datasheet,
that IS THE TIMING for early S100.

All of the later Z80, 6502, 6800, LSI-11, TI9900, COSMAC, 8085 and
808X to name a few boards tried to approximate that timing (before it
morphed to IEE696) with combinational logic.

Allison
Received on Sun Jan 21 2001 - 12:07:50 GMT