Recent content by smp

@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

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

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

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

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

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...

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

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

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...

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

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

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

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

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...

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...