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Do you have a quad extender card (or 2 double-wide extender cards)? If so, you could test the M8417 RAM in your 8E system (after temporarily removing existing quad-size memory). The MS8-C should be able to run any memory/core/RAM test error-free in your 8E. Likewise we know the M8316 can be...

If your CPU is a KK8-A (M8315) it should go in slot 1. If your CPU is a KK8-E (M8300-M8341) use the highest-number slots.

No problem. I have MS8-C RAM and MM8A core in a '620 box (2 X G8018's) with no battery backup. Ref: attached regulator schematics if needed.

If someone is serious about creating an Omnibus RK05 drive controller/interface, please consider doing the RK8L (2 quad boards). It includes support for 8 drives and 1-4096 word transfers. The 1-4096 word count feature simplifies TSS/8 support. DEC has supplied 'official' RK8L diagnostics so...

Where do you manage to find spare DEC82nn chips nowdays?

He originally listed it at $15K, so it's gradually coming into view. The Roytron punch is probably the most valuable part. There are less costly ways to read & punch paper tape on a Omnibus 8. Another option is to just acquire and connect an ASR-33 teletype if you really need paper tape I/O.

How much memory is in these CNC 8M's? The G104-G227 modules would indicate 4K, so why would they have a KM8-E (M837) installed? What 'value-add' does a M837 bring to a 4K 8/E?

Track alignment was too challenging to accomodate pack swapping on the RK05-F. Didn't the RM03 need 'data center' AC power?

"One is not DEC, I have no information on it." One is not like the other two, but there's 3 DEC drives there. Maybe he's confused by the RK05F?

It's on Craigslist, but may be of interest to someone in the area. - DEC PDP8/A Vintage Computer by Digital Equipment Corp .. and eBay does have recent listings for PDP 8A programmers console PDP 8M front panel Seems like pricing for some vintage DEC items is approaching the original MLP...

This table is from p.10 of EK-RK5JF-MM-001. I'd suggest allowing up to 100ms for 200 (400 RK05F) track seek. The 'adjacent track seek' time of 0 ms. is incorrect. Earlier versions of the manual have it at 10ms which is about right. I'd expect the RK05F adjacent track seek time to be less...

Check out: DECmate OSSC info. Apparently it can be done, but I haven't done it (yet). Good luck with your DM-III. Is it floppy-only or came with a hard drive?

.. or try Memory4Less - 'refurbished' RL02 drive belt at a better price

12-13369 drive belt in stock at MCA (same part # for RL01). Price seems a bit high, maybe you can give them a tax-deductable receipt in exchange for a donation?

Looks like most of the content at mfarris.com has been captured by archive.org.

It's usually an indication the part is selected for a particular attribute (ex: leakage current, fanout drive current, rise-time, etc..) ex: DEC part # 19-09972 can be DEC6314 or DEC6314A. Apparently the difference wasn't considered significant enough to warrent a new part number. But a...

Yes, the cost of coolant and electricity would not likely be feasible for most hobbyists, but along the lines of PDP 11/70 or 11/45 front-panels that hang on den walls, they'd make great conversation pieces. I'm guessing most early QC's get canabalized for subsequent versions, but I hope any...

Is it too early to consider 1st gen quantum computing devices as 'vintage' computers? They look great (like expensive chandeliers) and were literally as cool as can be. What happens to these early attempts at quantum computing? Do they get canabalized to make subsequent models? Do they end...

I think you'll prefer working with the ECS (DEC) connectors. The single-width ones are available from Todd Goodman for $10. ea. That price is OK for completing extender boards, but gets expensive when trying to populate a full H9194-style Omnibus. It'd be interesting to get a price for the...

.. nice. It took a moment to recognise the DEC logo in the lower-right corner. Would that have been the inspiration for the DEC Logic Lab or a custom test setup?