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  1. Jerry Thanks, I'll go figure out to populate...

    Jerry
    Thanks,
    I'll go figure out to populate the clock kalender.
    I'll let you know.

    Indeed the 306A came with the GTSC 122C-ADC card and probably that trigger signal attached to it, as it has...
  2. Real time clock card GTSC306A -adding Calender

    I Have a clock card GTSC306A but it is not fully populated and seems not having the calendar chipset.

    Does someone have this card and/or schematics so I can figure out how to put a calender...
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    R53 Hot , so lots of current. Current is...

    R53 Hot , so lots of current.

    Current is +30V-R19-D10-R53-Q12-(F-GND)

    Q12 conduct if R51 is High and so Q10 is active.
    Q10 is active is Base q10 is low so E2-12 is low.

    That is your main...
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    Jerry, Great thanks for the advices. "..M8059...

    Jerry,
    Great thanks for the advices.

    "..M8059 Memory set as 22 bit, starting address 0. 256 Kbytes addressable...
    Do you mean Strap to -Large System?

    The uNote 106 did the trick - Disable...
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    Yes That 22Bit trapping is still there. Should...

    Yes That 22Bit trapping is still there.

    Should the strapping Red-Green (18 Bit) also be made?
    I measured now At A and C and Pins drawing colour Red -Green are connected! Originally
    as is was...
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    So for a 22Bit H2970 system I only have to strap...

    So for a 22Bit H2970 system I only have to strap the colours:
    Blue,Brown,Yellow and Purple series?

    Not the Red and Green?
    Those are only for 18 Bit?

    I do understand the colour connection...
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    Ok, coming all back again from date 2014 when I...

    Ok, coming all back again from date 2014 when I had problems with the M7555 RQDX3 card
    and formatting the RD31 (ST225 MFM ) Hard drives.
    Finally I did that through loading ZQRCF0 the ODT trick and...
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    Ok 18/22 Bit problem, I'll go figure out. ...

    Ok 18/22 Bit problem,
    I'll go figure out.

    53435

    M8186 "050 C3"
    53436

    53437
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    Pulled Both the M8047's and just the CPU -...

    Pulled Both the M8047's and just the CPU - M8059-KF and the G304 serial card.
    Strapped to address 0 and With CSR address 172100
    53426

    Typed in Bootstrap TU58.
    Run MEMX
    Total memory is 256kB...
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    See my previous post about the current strapping...

    See my previous post about the current strapping M8059.
    Make that sens?
    Also the strapping Half or Full mem is that full population of ICs. or the 128k or 256k mem?
    Thanks for all tips.

    I ll go...
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    I can't remember that Switch setting SW= 00000000...

    I can't remember that Switch setting SW= 00000000 NEW:
    Wrote down in the printout back in 2014 "00000200" don't recall why.

    I run the XXDP program VMJA0 with installed: and with that SW= 200.
    2x...
  12. Replies
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    The M8059 MSV11-L checking wraps. I have 2x...

    The M8059 MSV11-L checking wraps.
    I have 2x M8047 (16k) makes it 32k Words total.
    1x M8047 has 16k-1 Bit RAM (16x 4116P)

    Adding the M8059 with full Memory installed should be 128k total....
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    The option "BOOT DU0:RT11SJ" did not solve the...

    The option "BOOT DU0:RT11SJ" did not solve the problem.

    Pulled out the M8059-KF MSV11-LK MEM 128K card,
    and:

    RT-11SJ V5.03 now boots every time from all devices ( MFM Harddrive, RX02 disk or...
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    Jerry. Thanks for the reply, I'll go check with...

    Jerry.
    Thanks for the reply,
    I'll go check with the option BOOT DY1:RT11SJ

    Before (some years ago) I had no problem booting V5.03 from Tape TU58 emu and back then made several boot tapes.
    Now I...
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    Looking for a DEC VT100 HV-LOPT Part

    Does someone has a spare VT100-103 etc HV-trafo ?

    16-16463-00
    VOBT

    Would be great, mine is definitively broke down.

    53337
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    DEC PDP1123 Boot failure Rt11SJ-V5.03

    I have my PDP1123 up and running again.
    On the M8047 the console port was/Is defective (Think a serial buffer IC 9036/9037) It does not receive keyboard strokes from the Vt420 terminal.
    So put a...
  17. David, Ok no LOW ESR caps, normaly a PWM-PSU...

    David,
    Ok no LOW ESR caps, normaly a PWM-PSU needs them to keep the tempature low of the capacitors.
    ESR is the resistance at a frequency, and due to the high frequency there are in pwm's LOW ESR...
  18. I have replaced all caps and still have the same...

    I have replaced all caps and still have the same symptom........

    As if its probably a PWM switching supply the capacitors has to be of a LOW ESR-Type.
    So replace again with good type of...
  19. @ Paul I put the 8032 power supply schematics...

    @ Paul

    I put the 8032 power supply schematics in my previous post.
    It is a simple with regulaturs LM340/78xx like and they have a very large input range according to the steady-output.

    At most...
  20. Power-supply's are designed to work within a...

    Power-supply's are designed to work within a range, normaly also a PET has no problems with the 233Vac.

    Think you have a problem with the 5V-regulation in the power supply.
    Here is your 8032...
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    CBM PET Printer 3022 -Defect

    I got an old CBM 3022 printer to go with my PET.
    Date on Ic's app begin of 1979.
    Great I thought.
    But is was defect,
    After an inspection and clean out I start the Printer, The head moved half...
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    Final Report, The diskdrive 8050 is running! ...

    Final Report, The diskdrive 8050 is running!

    Problems found.
    Analog drive PCB
    - UN1 (Opamp) Defect -no output.

    Digital drive PCB;
    Lines 6522 E0-E6 just low (must contain data)
    -UN3 Dual...
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    Ruud, Great Idea! HCC? 17e Meantime I debug...

    Ruud,
    Great Idea!
    HCC? 17e

    Meantime I debug some more.
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    First defect 8050 fault 1 repaired . That LM311...

    First defect 8050 fault 1 repaired . That LM311 U1 was defect.
    But both digital boards stil a problem.
    Tested both 6522 an OK. and 6502 ok.
    Have problems on the E-lines of the 6522.
    ROM 6316 is...
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    Check if the motor it self is turning at a Load...

    Check if the motor it self is turning at a Load Command.

    Clean the heads with alcohol .
    Clean the capstan and capstan wheel.

    Simualair to the old HiFi-cassettedeck's a good clean head and...
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