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Type: Posts; User: m_thompson

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    I got the PDP-9 to format DECtapes today. The...

    I got the PDP-9 to format DECtapes today. The clock that generates the timing track was running a little slow, so it ran off the end of the tape before it finished. It is currently adjusted to have a...
  2. The Rhode Island Computer Museum has an...

    The Rhode Island Computer Museum has an Integrated Server 3006 which is very similar to the Multiprise 3000. We could use any I/O cards that you don't plan to use.
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    Could you use SIMH to read the PAL source like it...

    Could you use SIMH to read the PAL source like it was a paper tape image and save it on the diskette image?
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    BQT, I used PIP-10 to extract files from a...

    BQT,

    I used PIP-10 to extract files from a PDP-10 KA10 DECtape a few weeks ago. I should look at the code.
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    I am learning way more than I wanted about...

    I am learning way more than I wanted about dumprest for the PDP-9. The dumptd8e_18 that is on that is on Dave's WWW page does not fiddle with the format of the DECtape image file that is saved on...
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    We tried to format a DECtape on the PDP-9 using...

    We tried to format a DECtape on the PDP-9 using the paper tape that Mattis punched for us. The formatter program loads and runs, but doesn't like the zero that we entered for the drive number. We...
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    The MEMORY ADDRESS test is supplied in RIM format...

    The MEMORY ADDRESS test is supplied in RIM format and uses a very limited set of instructions.
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    2, IF is Instruction Field and DF is Data Field....

    2, IF is Instruction Field and DF is Data Field.
    3, If you loaded the MAINDEC into memory field 1, then you would set the Switch Register to 1.
    3, If you loaded the MAINDEC into memory field 0,...
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    Well, that didn't go so well. I started making a...

    Well, that didn't go so well. I started making a PDP-9 disassembler for paper tapes. It gave me a listing of the ADSS bootstrap tape that came with SIMH. I toggled in the bootstrap and started it....
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    The normal PDP-8 & TD8E DECtape formatter knows...

    The normal PDP-8 & TD8E DECtape formatter knows how to create PDP-9 DECtapes. It took a few tries, but I now have three blank PDP-9 DECtapes.

    This week I tried several of the ADSS images that...
  11. Very nice! I recently got an 11/53, so loading...

    Very nice!

    I recently got an 11/53, so loading UNIX is on my to do list.
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    SIMH PDP-9 DECtape images include some blocks...

    SIMH PDP-9 DECtape images include some blocks that the PDP-9 wrote in the reverse direction. These blocks are stored in the SIMH DECtape image in the complement obverse format. SIMH will convert...
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    Now for the next PDP-9 adventure. Using SIMH I...

    Now for the next PDP-9 adventure. Using SIMH I have SYSGENed a version of ADSS tailored to match the hardware in the PDP-9. We now need to write this image onto a real DECtape. I have used my PDP-8/e...
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    https://c2.com/~ward/morse/pdp8/

    https://c2.com/~ward/morse/pdp8/
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    Google finds source code to do this...

    Google finds source code to do this...
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    Technically, that is an integrated circuit...

    Technically, that is an integrated circuit...
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    Hopefully in a week or so, we will have made a...

    Hopefully in a week or so, we will have made a bootable ADSS DECtape on my PDP-8/e, punched the ADSS bootloader on a paper tape, and have ADSS running. That will start a whole different move...
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    It is pretty amazing that all of that works...

    It is pretty amazing that all of that works without any integrated circuits.
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    We finally got the DECtape controller on the...

    We finally got the DECtape controller on the PDP-9 working. Time to write an ADSS DECtape and see if we can get an operating system to boot.

    There is a video of it running the random read/write...
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    I have found a few unsoldered component leads in...

    I have found a few unsoldered component leads in DEC boards that worked fine for many years and then decided to stop working.
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    56122 D15: 0->WINDOW D14: (100)->C0-2 D13:...

    56122
    D15: 0->WINDOW
    D14: (100)->C0-2
    D13: C-SYNC
    D12: MK BLK START
    D11: MK DATA
    D10: MK BLK END
    D09: MK END
    D08: MKTK Error
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    We connected the logic analyzer to the TC02...

    We connected the logic analyzer to the TC02 Window Register and found that the Mark Track is being read correctly and the data is shifting through the Window Register correctly. The Window Register...
  23. You also need to have switch 0 on when you run...

    You also need to have switch 0 on when you run the BIN loader so that it will use the serial console port. If switch 0 is off the BIN loader will try to read from the paper tape reader.
  24. I have an Infoserver 150 with a CDROM in the main...

    I have an Infoserver 150 with a CDROM in the main chassis, and a storage expansion chassis holding a TZ30 tape drive, running V3.5 software. The client can install from, disk, tape, or CDROM.
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    The RICM has an NCR 8250...

    The RICM has an NCR 8250. The boards look about the same size as the ones in the 399. This system has a cassette deck, and a stack of cassettes that looks like they hold cash register software.
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