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Recent content by smp

  1. smp

    Build your own PDP 8I, Part 4..

    @altelch Thank you so much for all your help! I have successfully gotten this simulation working on my home laptop! It's very cool to watch it go - I'm getting about 260 KHz. Now to start really getting into some manual program entry! smp
  2. smp

    California WTB: Pen-based Windows 95 tablet with color screen

    How about a Compaq TC1000? I have purchased a new battery for it and I also have downloaded the 4 manuals I could find. Just asking... smp
  3. smp

    Heathkit computer

    When you need info on Heathkit computer equipment, the SEBHC is the place to go: https://sebhc.github.io/sebhc/ smp
  4. smp

    DEC units on ebay

    DEC Digital PDP-11/55 on eBay (not mine)...
  5. smp

    Altair 8800c Debugging Help

    It appears that you have no RAM memory installed. Is that the case? If so, the computer cannot work yet. If I am mistaken and there is RAM in there, please disregard. smp
  6. smp

    DEC units on ebay

    Sorry if this is a duplicate post, but I didn't see any other: DEC PDP 8L Very Rare but Most Popular in late 1960s...
  7. smp

    Another SCAM Alert

    I believe that the "resends" in the second line should be "rescinds." 8-) smp
  8. smp

    Pacific Northwest Intel Multibus Chassis, MDS-800, or other Multibus equipment

    BTW, if you want only the 4 position backplane, there’s this on eBay...
  9. smp

    Pacific Northwest Intel Multibus Chassis, MDS-800, or other Multibus equipment

    If you want to start with a smaller system, consider fig-FORTH from that era. Small footprint, runs in 16K. You could keep it in less than 8K of EPROM, and move it into a 16K block of RAM for execution. It’s easy to keep your programs as text files, and feed them into the system from your...
  10. smp

    Pacific Northwest Intel Multibus Chassis, MDS-800, or other Multibus equipment

    Looks like a 4 slot card cage is available on eBay...
  11. smp

    DEC units on ebay

    PDP-8/A on eBay. Not mine, but I wish … https://www.ebay.com/itm/176590546698 smp
  12. smp

    DEC units on ebay

    PDP-8/M, not mine: eBay item 135225526088 smp
  13. smp

    New England Free Vintage Computers - Manchester NH area

    Yesterday, I was contacted by an individual who is taking the entire lot. If this deal falls through, I will re-post my offer. Thanks for your interest. smp
  14. smp

    New England Free Vintage Computers - Manchester NH area

    Hello all, I am winnowing down my collection of Vintage Computer stuff to make space for other storage needs, and to make life a little easier on those who I will eventually leave behind. I have the following stuff available for free to pickup in the Manchester NH area: - Sun Sparc Classic...
  15. smp

    Grid newbie questions

    Yes, that's that the spec sheet here says also: https://classicbits.net/library/?opt=103&dev=1149&class1=Portable&desc=Grid_GridCase_1550_SX But for me, I was getting "unreadable disk" errors until I tried one of my 720KB floppies, and then it was fine. Later, I'll continue experimenting with...
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