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  1. Replies
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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...
  2. 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.
  3. 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.
  5. I have an InfoServer, so I probably have the...

    I have an InfoServer, so I probably have the installation media. I will look for it.
  6. Replies
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    Anders, I did not diagnose the problem...

    Anders,

    I did not diagnose the problem correctly. The Core between 2000-2777 did not work. OS/8 would load correctly and run, but would not respond to any console commands. Instruction Test 2 uses...
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    Replacing the G221 in slot C08 got the memory...

    Replacing the G221 in slot C08 got the memory working again. Now the serial console is not working...
  8. Replies
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    Ah, its a core memory problem. The Core from 2000...

    Ah, its a core memory problem. The Core from 2000 to 2777 is always 0000. The JMS instruction @2675 to the routine that fixes the JMP instruction @ 0001 never executed. As long as the Core stack is...
  9. Replies
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    The PDP-12 passes MAINDEC-8I-D01C Instruction...

    The PDP-12 passes MAINDEC-8I-D01C Instruction Test 1, but fails fails MAINDEC-8I-D02B Instruction Test 2. It gets stuck in an loop at 0001 executing a JMP 0001. Instruction Test 2 tests that...
  10. Replies
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    DEC also had problems with the fuse holders on...

    DEC also had problems with the fuse holders on the 8/e power supply, so I can understand there reluctance to install fuses were they might not be needed for 40-50 years.
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    PDP-12 at the RICM

    The PDP-12 at the RICM broke a few weeks ago, and I finally had a chance to look at it. When first powered up it will boot and run OS/8 from the RK05. It will not run SPACEWAR or TANK or any of the...
  12. Very nice!

    Very nice!
  13. Replies
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    When we disassembled the VR14 on the PDP-12 the...

    When we disassembled the VR14 on the PDP-12 the front glass was only attached over about 10% of the surface so we could easily remove it.
  14. The RICM has a TU60 with melted rollers. Please...

    The RICM has a TU60 with melted rollers. Please post your results with getting the rollers replaced.
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    Thanks very much for scanning and posting the...

    Thanks very much for scanning and posting the documentation.
    The RICM has permission from ECRM to distribute the scanner documentation and software.
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    I have been working on a Windows GUI program that...

    I have been working on a Windows GUI program that can read OS/8, ADSS, and LAPS/DIAL SIMH disk and DECtape images. It is far from finished, but getting better and useful.
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    The MAINDECs for the TD8E are very comprehensive...

    The MAINDECs for the TD8E are very comprehensive and complicated so I made some very simple tests for the TD8E.
    One will copy the console switches to the Command Register. This will let you move the...
  18. Replies
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    I spent some time today chasing an issue with the...

    I spent some time today chasing an issue with the TC02 DECtape controller where it would interrupt when it shouldn't, and not interrupt when it should. After an hour of chasing signals around the...
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    Today was a holiday in RI, so I had some more...

    Today was a holiday in RI, so I had some more time to work on the PDP-9.

    I ran MAINDEC-9A D3BB-PB TC02 Basic Exerciser test #11, TC02 Instruction Test to see if the issues we had with the Status...
  20. Replies
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    We have so much equipment that needs to be...

    We have so much equipment that needs to be restored and made demonstrable...
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    He is going to URI for grad school, so just a 15...

    He is going to URI for grad school, so just a 15 minute drive away.
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    Jack, The PDP-9 helpers are two existing...

    Jack,

    The PDP-9 helpers are two existing volunteers, and one new young volunteer. Dawson should move here in a few weeks, so can hopefully volunteer him to help keep the PDP-12 and the PDP-8/I...
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    We had a very successful day working on the DEC...

    We had a very successful day working on the DEC PDP-9 and TC02 DECtape controller.

    Alex found and replaced a bad diode on the B310 delay line FlipChip that prevented the core memory from working a...
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    Very nice! Omnibus boards are going for very high...

    Very nice! Omnibus boards are going for very high prices on eBay lately.
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    I made a similar Omnibus board and put a combo...

    I made a similar Omnibus board and put a combo FPGA-ARM3 on it. It could emulate any peripheral that didn't need DMA.
    ...
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