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It also states 120V 33 watts. Are you sure the AC cord wasn't removed? Looks like the cord would fit in the hole to the left of the 12v barrel...

There is a Facebook Microchannel page where some one has done this... https://www.facebook.com/groups/CSIPH

Cache is bad, replace the CPU.

But the PCBs have Mitsubishi logos too (see picture), I could try asking Toshiba if they recognize the model number.

I’m not concerned what use people make of any hacks I’ve done so whatever you think is helpful just go ahead.

Okay, you're good--this is only an 8 pin device, so you need to first check for +5 between pins 1 and 8. When you hit a key on the keyboard, you...

Capacitors from the 70s and prior go electrically leaky and are just as problematic. The paper insulation inside the capacitors goes acidic and...

Thanks for the reply. I've just done that and I get the same error. hmmm

Mostly it has been used to date with KL8E or KL8J, or cards (or software) that emulate them. You are incorrect, in that these cards *do* default...

Sorry for the typos, I just realized I cannot edit my post anymore.. :( It should be "Olivetti PCS286 weird characters and no POST" and I should...

Really cool PCI encoder board: https://boulder.craigslist.org/sop/d/longmont-canopus-dv-storm/7267334697.html

Looking forward to seeing what is on there .... Either going to try and image the hard drive and see if I can find the root pwd somewhere, or see if...

Yes I have a logic probe.

OS/8 file systems can support at most 1 million words (4096 blocks of 256 words=1048576 words or 1572864 bytes). This is why larger devices present...

You wrote that you are looking for a flash-based hard disk solution, and this gives you one which is CF card-based. You also get a second...

Okay, with the firmware, that should work right out of the box. Got a logic probe or scope?

Correct, in as far as what the FORTRAN runtime system does. When calling OS/8 drivers, interrupts needs to be off, since the drivers are written with...

I am using PIC12F629

A very cheap way to check capacitors is one of the little LCR-TC1 testers. Accurate enough for a go-no go test and can identify all sorts of...

That's the way it should be--there's only 03FE worth of flash on the thing. Which PIC MCU did you use? Time, I think, to do some probing with a...

Almost. What I believe is happening is that Fortran disables interrupts, calls the driver, then enables interrupts after the return. The issue,...

They also need to be discharged, else you'll most likely blow up your meter.

Great design, thanks for using through-hole rather than surface mount components which should make it much easier to assemble. And is that a D830? ...

Licensed user back in the day, AND the Russian language add-on. Mike

1984. It was then that I ported my own editor from x80 code, finally. Still use it on occasion (it's pretty small)

Perhaps--they can be a bit abrasive, I understand. And single-use only, obviously.

"Well spotted on the center negative pin, most adapters have center positive pin. " That's one of the things I hate about barrel connectors--no...

There are some inaccuracies in the narrative. The header is identified as an IDE connector; it's a legacy floppy (SA400) connector. He also says...

My understanding of the Fortran run time issue is that Fortran runs with interrupts enabled. The serial ports on omnibus machines wake up so they...