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Richard Erlacher
11/20/11 16:00
Read: 420 times
Denver, Co
USA


 
#184839 - Unfortunately ...
Responding to: Jan Waclawek's previous message
Those 8041/8042 chips are hard-coded ROM-based chips, hence won't do much, as, IIRC, they don't work with external memory.

The 8041 series was designed as peripheral chip, i.e. has a parallel bus interface. Some of Intel's original GPIB and other interface chips were really just masked-rom 8041/42's.

What you MIGHT want is an 8741 ... of which I MAY still have one or two ... somewhere ... though I haven't seen 'em since my move a couple of years ago.

These chips were interesting back in the day, because they functioned, in microcomputer-based systems, as peripheral chips, yet were programmable just as modern microcontrollers are today. Sadly, I'm not aware of any chips that can be interfaced in that way today, hence have to roll-my-own using programmable logic.

RE


List of 12 messages in thread
TopicAuthorDate
Sourcing historic uCs      Greg Kennedy      11/20/11 12:28      
   Vintage MCUs      Michael Karas      11/20/11 13:03      
      8041      Jan Waclawek      11/20/11 13:42      
         Unfortunately ...      Richard Erlacher      11/20/11 16:00      
            external execution in '41/'42      Jan Waclawek      11/21/11 03:15      
               I don't doubt what you said ...      Richard Erlacher      11/21/11 09:45      
   Have some old 8748, 8749 and V20 chips      Bert Van Den Berg      11/20/11 15:27      
      I've got some other old MCU and MPU chips ...      Richard Erlacher      11/20/11 16:08      
   Can you program them      Aubrey Kagan      11/21/11 13:59      
      Some of us have those ... even the programmables      Richard Erlacher      11/21/11 21:27      
   If I can find 'em ...      Richard Erlacher      11/21/11 21:30      
   seems still live      Stefan KAnev      11/22/11 08:03      

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