10 Nov
2005
10 Nov
'05
5:22 p.m.
Allison wrote:
Well if you are going to hack the 8008 you need the right tools.
Check here for a 8008 link I just found yesterday.
PS. Does anybody have docs about Hal Chamberlin's homewbrew computer.
Hal 4096? A search on the web turned up nothing,
Subject: RE:
help - 11/34 console problem -- CNTRL key behaviour
From: "Gooijen, Henk" <henk.gooijen at oce.com>
I am getting tempted to install the totally dead M7859, and have a
look at it, with the new knowledge build up from this module. May be
its is just a defective 8008, but I am afraid that if I get the dead
M7859 working, this weird defective one will end up on the pile of
things "I must do, when I get the time" ...
But I will first inspect the two RAM chips! 4-bit data in, 4-bit data
out, 4 address bits, one select pin and one clock pin (the WE* pin
is tied to GND). Should be possible to see it all with the 16 channels
and make a conclusion of the RAM's condition. You might have been
correct from the beginning, Tony!
It would be goof if you could run a different program and see it's results.
We used a set of ROMs all different to test. They were short programs that
would either loop or do something and halt. For example we had one that would
write (this was a time display) 00:00:00 then increment all the displays
without doing anything else. Another would write a 8 tot he last display
and halt. the most useful ones were those that would repeatedly loop input
or output to a port. Very handy as back (1973) then logic analysers were
not to be had and a 15mhz dual trace scope was the usual tool.