Recent content by pbirkel@gmail.com

Nice, but at $175 (DigiKey, if ever back in stock) rather over-priced. There have been a number of projects by Greenkeys members over the past decade that scratch this itch for both 60mA and 20mA current loop interfaces. Recommend checking them out. See earlier post...

Best source of information and parts: https://www.rtty.com/greenkeys.htm

Note that you have the earlier KD11-E board-set (M7265/M7266): https://gunkies.org/wiki/KD11-E_CPU Hence the presence of the M8264: https://gunkies.org/wiki/M8264_No-SACK_Timeout_Module The subsequent (and more common) KD11-EA board-set (M8265/M8266) integrates the No SACK Timeout circuitry...

The folks participating in HECNET would be very knowledgeable on this topic. https://gunkies.org/wiki/HECnet https://pdp-11.org.ru/en/hecnet.html

It's interesting that I've seen a number of these core memory boards show up on eBay recently with multiple (in some cases a half-dozen ) 2N5022 missing, apparently having been scavenged in order to repair other boards. Example with four missing: I'm curious as to why many of these core...

Really? Poor ENIAC, IBM System/360, and many, many other systems of the 40/50/60's not to mention the DEC family of PDP-8, 10, and 11. It all began with much wider data bus than 8-bits. Perhaps "modernish" is the opposite of "vintage" :-}.

Very interesting. Could you please post pictures of both sides of the PCB sufficient for someone to reverse-engineer the circuitry? A couple of shots of both sides from slightly different angles to expose all part-pins with the track connections would be very helpful, thank you. Reading the...

AFAICS, then and now, alas not :-{. All ears to hear more about "how DEC had no consistent plan for marketing J11 CPUs and the boards / systems they went into" :-}!

IMO the only possible definition for vintage/retro computing is "whatever people do with vintage/retro computers" and people are ... diverse. To include, sigh, wall-mounting trophy hunters. To answer the original question requires defining "vintage", "retro", "computing", and "computer". Aye...

Four floppy drives is interesting. But the (literally!) all-in-one design is a bit fearsome, although it does eliminate cable clutter. Gives new meaning to the concept of a "desk top computer". Just add legs :-}.

BTW, the Solar System is located in the Orion-Cygnus Arm (or simply the Orion Arm or Local Arm) of our galaxy (the Milky Way). There is no Andromeda Arm: https://science.nasa.gov/resource/the-milky-way-galaxy/ So Local Pickup Only is going to be *severely* limiting as you're probably located in...

Local Pickup Only significantly limits your audience! Consider donating it to the LSSM and taking a tax deduction. You do know about the LSSM in New Kensington ...

Thank you. Sure, but "for the record" :-}.

Neat! Could you please add a photo of the wiring-side of the adapter as well?

I don't see it in this thread. Which thread was that? I missed it :-{.