10 Jan
2012
10 Jan
'12
10:28 p.m.
On 01/09/2012 02:45 PM, Tony Duell wrote:
I will have to dig the instrument out to check (and I know the service
manual is sitting on top of the instruemt, so I can't check that any more
easily), but I think it's a 2240
IIRC all such units contai na 4040 for system control, etc. In mine
there's a secodn 4040 on the optional parallel output card (to drive a
Facit 4070 punch), used for code conversion, etc. I don't know what other
pptional cards were avaialble and whether they contain 4040s.
IIRC it doens't use any of the 4004/4040 specific memory ICs though. It
uses a thing called a 4289 (IIRC), which convertes the 4040 bus into a
convential memory bus (address + data) and uses that to talk to standard
RAM and EPROM ICs.
-tony
My 3 are all in devices I want to keep
operationmal (one in the Intel
UPP, the other 2 in a Fluke data logger).
What model of data logger uses 4040s?