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  • vrs42's Avatar
    November 5th, 2019, 08:48 AM
    I think there are driver/timing issues with this last. TD8E timing is tight, the driver is large, and I believe the driver uses 8/E-isms to meet the...
    6 replies | 273 view(s)
  • vrs42's Avatar
    October 27th, 2019, 10:27 AM
    RESTART is generated in the middle of the first sheet of the M8341 schematic, by the N8881 at E36. That suggests to me that it is actually active...
    2 replies | 290 view(s)
  • vrs42's Avatar
    October 26th, 2019, 10:00 PM
    As do I. One thing to note is that the etch level is different than the "revision" indicated on the schematics. The schematics you point to...
    2 replies | 290 view(s)
  • vrs42's Avatar
    October 26th, 2019, 09:16 PM
    I imagine that certain combinations were not expected to be used. For example, why have a TC08 and a TD8E? So they may have decided to re-use same...
    6 replies | 339 view(s)
  • vrs42's Avatar
    October 26th, 2019, 06:48 AM
    At the back of every edition of the Small Computer Handbook are tables of IOTs for the peripherals. In the 1973 edition (e/m/f), table 9-5 on page...
    6 replies | 339 view(s)
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About ftcnet

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About ftcnet
Biography:
DEC 12-bit field service tech
Location:
BC Canada
Interests:
Omnibus systems, peripherals
Occupation:
PC network support

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