help - 11/34 console problem -- CNTRL key behaviour
woodelf
bfranchuk at jetnet.ab.ca
Thu Nov 10 11:22:23 CST 2005
Allison wrote:
>>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.
>
>
>
Well if you are going to hack the 8008 you need the right tools.
Check here for a 8008 link I just found yesterday.
> http://www.jkearney.com/8008/
PS. Does anybody have docs about Hal Chamberlin's homewbrew computer.
Hal 4096? A search on the web turned up nothing,
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