Recent content by TJ_Mossman

This guy on epay has a few (non-working) https://www.ebay.co.uk/itm/Trend-paper-tape-punch-reader-/115729333553 Mine developed a PSU fault like most of the others I've seen, so I sold it as I ended up with a DEC PC04 in the meantime.

I wasted many hours trying to debug an intermittent issue like that on the IC level... It turned out to be a flaky 5V pin on the backplane's power cable. I'd check that first before doing anything else; in my case I could force it to halt by jiggling the cable or tapping the connector with a...

I've sent Jerry an email. I have a couple complete boardsets for the 34a as well as memory, serial, and disk I/O (RX01, RL02, RK05) too if they're of any help.

I thought the 11/34 CPU ROMs had been archived online somewhere but perhaps I'm muddling it up with something else like the M9301..? If nothing turns up I'm happy to lend you a spare M8266, assuming one of you has the ability to dump them.

With thanks to SteveG I now have the Scotch pack pictured above to play with! It mounts and spins just fine, but on inspecting the platter I found a few dozen odd specs and bumps (corrosion?) that can't be removed with IPA and Kimwipes, so I won't be able to test the heads just yet. Meanwhile...

Does anyone still have a timesharing system running on their PDP-8? I know Josh Dersch modified TSS/8 to run from an RK05 on the LCM's 8/e, but since the LCM closed down I don't know of any other timesharing 8's that are still running. With any luck I'll get ETOS running soon, as I found the...

My TU56 also lacked a H716, so I used MPM-30-15ST 15v and MPM-30-15ST 5v power supplies. I wired them in series, using the positive terminal of the 15v and negative terminal of the 5v supplies as a common ground. I also added fuses to match the H716. It's rather ugly right now, but later I'll...

A few months ago I picked up an RK05j for my PDP-8/e, and I've finally got around to replacing the foam and testing the electronics, which so far seem fine. However when trying to load a cartridge, it doesn't seem to stick to the spindle magnet correctly, as the platter hits the "duckbill" when...

Is there anyone near the Pasadena CA area who'd be willing to crate up this rack of PDP-11 gear (sans Altair, plus RK05) and drop it off at the Port of LA for me? Cash, hardware, and beer can be provided in exchange. I'd do it myself, but I can't enter the US until the COVID restrictions are over.

I received a TI-59 Programmable Calculator with PC-100B printer as part of a bundle of other stuff. The printer unit lights up but no voltage appears on the terminals that connect it to the calculator. I believe the battery (which I don't have) needs to be connected for it to work properly. I...

FTGH: BBC Micro Case and Keyboard. It's pretty dirty but should probably clean up OK. If there's no interest I may consider saving keycaps if anyone needs any. For pics see: https://imgur.com/a/HShJUIa

Selling my VT510. Good working order, only flaws are the odd scuff and some very minor yellowing. Owned since new, only had a few months of use so no burn-in. Uses a normal PS/2 keyboard (not included) For pics, see here. Open to offers, feel free to DM me.

Selling my KIM-1 (Rev A, MOS Branded) with Corsham 60K RAM expansion, I/O interface (RS-232 and cassette), and Manual (reprint I think) Working order, got it to run Tiny BASIC last time I had a proper play with it. Has some minor PCB rework but in otherwise nice shape. I'm in England but can...

I got some Fabri-Tek gear going spare that was bundled with some PDP-8 stuff I bought recently. They appear to be protoboards of some kind, there's some documents hinting at a custom paper tape interface for a flexowriter compatible teleprinter, so it may have been for that. Obviously selling...

Hi All, I'm planning on doing a few projects in OS/8 BASIC, and am looking for the most feature-complete version I can find. While looking at David Gesswein's site (http://www.pdp8online.com/images/images/os8.shtml), I found that there's a few available - namely: OS/8 with BASIC OS/8 with...