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  1. Replies
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    Nope. I recently switched to Thunderbird, and...

    Nope. I recently switched to Thunderbird, and apparently the junk mail folders defaulted to not notify me. Should be fixed now.

    I did find your email, and will respond to it tonight. Thanks!
    ...
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    Cool! I have about 20 of the kits left. If you...

    Cool! I have about 20 of the kits left. If you go to http://www.so-much-stuff.com/pdp8/32KOmnibus/32KOmnibus.php and click on the link there, it should get you a direct email path to me.

    Vince
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    Well, that's not supposed to happen :eh:. That...

    Well, that's not supposed to happen :eh:.

    That seems a little odd, too.

    I had a draft, but the forum ate it instead of posting it, where I had a couple of other ideas.

    Make sure C10 is...
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    If I am following this, you loaded the IAC;ISZ...

    If I am following this, you loaded the IAC;ISZ 0300; JMP .-1; JMP 0200 loop at 0200, which is test 26?

    I'm (like you) at a loss as to how MA can equal 25. What does "another bit of code loaded...
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    Silly question, but are you trying to run with...

    Silly question, but are you trying to run with the Alliance memory chips, or with the replacement Cypress chips I sent you?

    Vince
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    Thanks! I can certainly sympathize, and my...

    Thanks!

    I can certainly sympathize, and my error rate is pretty high to begin with.
    Your input was quite valuable with tracking down the memory chip issue!

    Speaking of the memory+boot board, I...
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    There was some progress on this front yesterday. ...

    There was some progress on this front yesterday. I had set things aside for a time, as the 8/E would not boot with the card installed. This even with all the chips removed! The bare board didn't...
  8. Thread: CIT-101 terminal

    by vrs42
    Replies
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    4,711

    I'm no expert, but I think I remember an issue...

    I'm no expert, but I think I remember an issue with keyboards of the VT100 and it's clones. So I don't think I'd try it without some kind of authoritive check.

    Vince
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    Not a lot to tell, yet. It's a full size Omnibus...

    Not a lot to tell, yet. It's a full size Omnibus card, which attempts to implement the VC8E board set and an M1703 subset input port (to save wear on your switch register). The logic for the boards...
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    Yeah, things are feeling hectic, as VCF-PNW is...

    Yeah, things are feeling hectic, as VCF-PNW is coming up and I really want
    to get a Spacewar board working by then. So I'm afraid I have been a bit
    pokey about the boot+mem card.

    I like the...
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    I've made a small run of your bootloader and the...

    I've made a small run of your bootloader and the 32K memory on a full size board.

    I still need to build out and test the bootloader side.

    51037

    Vince
  12. Thread: PDP-8L Modules

    by vrs42
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    I actually have boards for the AT1504 version of...

    I actually have boards for the AT1504 version of the M220A/B.



    Which ones? I may be able to answer that more quickly. Most of the boards have been re-done in the last couple of years to...
  13. I have had some luck simply using machine pin...

    I have had some luck simply using machine pin sockets in the bulb holes, then pressing the bi-pin bulbs into the sockets.
    I did this for my 8/I lights boards mentioned here:...
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    No, nothing substantive. Eagle verifies them as...

    No, nothing substantive. Eagle verifies them as equivalent, though the files don't compare byte-wise.
    (I suspect one was saved with a slightly newer Eagle than the other.)

    Vince
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    What level of detail are you looking for? DEC...

    What level of detail are you looking for? DEC drawings can be found at
    http://www.bitsavers.org/pdf/dec/pdp8/pdp8i/PDP-8I_RevCY_Engineering_Drawings_Dec71.pdf
    and pages 40 and 41 specifically...
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    I've had that problem. What you need is a...

    I've had that problem. What you need is a (thickish) pinhole in your mold
    to allow that region to fill with resin. Otherwise an air bubble gets trapped
    there, and pumping can't really get rid...
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    That sounds great! Yesterday, I read in a...

    That sounds great!

    Yesterday, I read in a small pile of DEC-xx paper tape I had acquired at VCFMW (had done the DECUS and MAINDEC from that pile before), only to discover most were duplicates. I...
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    Thanks! That is what I was going for. I've...

    Thanks!

    That is what I was going for. I've scanned my DECUS tapes and write-ups, and almost all my MAINDEC tapes and write-ups, and rounded up what I could from other folk's sites. The exception...
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    I've got a pile of maindecs, including those,...

    I've got a pile of maindecs, including those, here:
    http://www.so-much-stuff.com/pdp8/software/maindec.php

    Yes, there are some versions of the diskless control test there, too.

    Vince
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    I have Eagle drawings for a version of the M993...

    I have Eagle drawings for a version of the M993 on my site:
    http://svn.so-much-stuff.com/svn/trunk/Eagle/projects/DEC/Mxxx/M993/



    I also have a few versions of the drive exerciser:...
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    I'm pretty sure that's a false positive. There...

    I'm pretty sure that's a false positive. There should be no javascript or executable code of any kind on any of my web pages. (There is some server side scripting, but what gets to you should be...
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    Thanks! Alas, no, I haven't built any RK8E...

    Thanks!



    Alas, no, I haven't built any RK8E boards. Getting the PCBs made is easy these days. Getting the old-stock logic chips can be challenging.

    It might be feasible to do a CPLD...
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    I had a look at my box of LA36 ribbons and my...

    I had a look at my box of LA36 ribbons and my Decwriter III. The spindle hole looks the same, but the hub diameter is different. That suggests the shorter ribbon will fit in the Decwriter III, but...
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    Here's something that should help you make use of...

    Here's something that should help you make use of the extender card:
    http://bitsavers.trailing-edge.com/pdf/dec/pdp8/pdp8e/Omnibus_legenda.pdf

    For instance "STOP L D2S" means that STOP_L can...
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    I have uploaded a schematic that's a little...

    I have uploaded a schematic that's a little easier to read here:
    http://svn.so-much-stuff.com/svn/trunk/Eagle/projects/DEC/8ePanel/5409668.pdf

    Jack, do you have the ability to scan the board?
    ...
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