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  • MikeS's Avatar
    August 14th, 2019, 04:43 AM
    Most of the AIM manuals are available on Rich Cini's excellent site (under Rockwell), but I'd love to see the Math Package manual... ...
    12 replies | 198 view(s)
  • dave_m's Avatar
    July 31st, 2019, 09:33 AM
    dave_m replied to a thread Another dead SuperPET! in Commodore
    +2 for Frank suggestions. Without Horizontal Drive on J7 at 20KHz, there will be no high voltage generated to CRT. No Horizontal Drive may be due to...
    9 replies | 330 view(s)
  • dave_m's Avatar
    July 28th, 2019, 11:12 AM
    Well done so far! Take a break. You must be seeing 1's & 0's in your sleep by now. Will one of the tests include checking the contents of the...
    18 replies | 1187 view(s)
  • dave_m's Avatar
    July 27th, 2019, 06:43 PM
    Rob, Yes, that sounds good. After you replaced the bad 74175 latch, you placed the system back in the system and checked to see if everything...
    18 replies | 1187 view(s)
  • MikeS's Avatar
    July 27th, 2019, 01:36 PM
    For what it's worth: https://www.youtube.com/watch?v=dXI6Bw2AbaU
    8 replies | 565 view(s)
  • dave_m's Avatar
    July 26th, 2019, 12:27 PM
    In the original 2001-8 PETs, that port did connect to the internal cassette and was the default device (1). In the next models, it is device #2 as in...
    7 replies | 365 view(s)
  • dave_m's Avatar
    July 25th, 2019, 03:55 PM
    Mattis, That is a good basic check to see if the INTR pulses high at power-on. Also he should check that READY is always high. READY seems to come...
    18 replies | 1187 view(s)
  • dave_m's Avatar
    July 24th, 2019, 01:34 PM
    Rob, I saw your name on the software comments. Yes, I missed where you mentioned trying a 8008. You are doing good. I admire the programmed tester...
    18 replies | 1187 view(s)
  • dave_m's Avatar
    July 23rd, 2019, 09:43 PM
    Your test set checked out a lot of circuitry except the 8008 CPU. Shouldn't you replace the 8008 or have you?
    18 replies | 1187 view(s)
  • dave_m's Avatar
    July 22nd, 2019, 07:45 AM
    What software did you use to create that detailed block diagram?
    18 replies | 1187 view(s)
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About MikeS

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About MikeS
Location:
Toronto ON Canada
Interests:
Cromemco,S100,PET,AIM65,PC
Occupation:
Geezer

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