Search results

In my experience the M8655 is more common than the M8650. I would like an M8650 but when I see one they go for premium prices. I have two M8655 and they seem to go for more reasonable prices. If you are going to use one of these as a "Virtual Disk Device" using Kyle's Serial Disk or my...

I get to debug my RK8E soon so I am very interested in your experiences. I need to get a set of those top block extenders as I don't relish tacking wires to the points needing monitoring. Thanks for posting!

The PC doesn't always increment on a sing step. It should when using the sing inst. Sing step breaks down the instruction into its sub cycles of Fetch, the optional Defer, and Execute. Sing inst performs a whole instruction. If you can deposit from the front panel the problem with DCA must...

Another option would be to run the drive on a UPS.

They probably don't belong there. While not impossible that there was some revision, it is far more likely someone just plugged boards into those slots. If you haven't already done so it is probably a good idea to check every slot to make sure the correct card is present. Cards in wrong slot...

For the most part, yes. While it is possible to get a false positive it is extremely unlikely. And quite low probability of damaging something if you are on the wrong pins.

Nope. Will get one someday but would rather hang a TC08 off of a posibus board although that will be more difficult to find. Nope. Probably a really rare card. I've never looked at it so don't know how it works or what it really does. Warrens approach was to read even blocks on the forward...

I need to make the CRC32 program OS/8 compatible and put it up on github. It was a hard purchase for me. I didn't have a lot of money at the time. I can probably do this at some point. I seem to have a critical mass of DECtapes. Scope the output of the amplifiers. Look for anomalies. They...

Since I have a lot of Warrens stuff I probably have copies of the images as well. I remember we were trying to code a CRC32 to run fast enough to keep up with DECtape but we came to the conclusion that the 8 was just a bit too slow. We spent hours working on that code and I managed to find...

Ok, I found it. The M8311 requires the memory stall signal to work as it is very slow. An 8/e would run at about half speed when using one of these.

I don't remember exactly what the issue with the M8311 is when used with the KK8E cpu board set but I think you are correct and it won't work. The KK8A is a 1.5 us memory cycle and the KK8E is normally a 1.2 us cycle for the fast cycle. You can jumper it to do 1.4 us for all cycles but I am...

It is a very nice looking front panel in excellent condition. I considered bidding on it when it first popped up but it was already over $300 so I decided to wait and see if I could maybe snipe it last minute for $500. Course it was already over that this morning so out of my league! I really...

I forgot all about the multiplexed 7 segments in the A front panel. Good catch!

I always wondered if you could plug an E front panel into an A chassis with an A front panel connected. It looks like it does work! What I am questioning is why the displays are not showing the same thing. The E panel shows the MD as 6232 and the A shows it as 232. What am I missing?

Thanks for that! Someday I will verify my stuff with yours.

There are several different boot roms on the M8317. I don't remember how many, three or four at least. And several different dip selectable in each one of those. How did you get the serial disk boot into the M8317? I have some unburned parts but they are single use and I have not needed to...

I have 5 of the M8350 boards. It is the most common quad omnibus board in my collection even though I have never intentionally purchased one and have no Posibus peripherals to use them with. They just seem to show up in machines or when I bought a collection of boards. And I don't have any...

Ahhhh. Slot 15 M835 or the later M8350 is the posibus card. This box had Posibus peripherals at one time. And if it had the M8360 in Slot 10 that would also have allowed one Data break device. As an early serial number unit (318 from 4/25/1971) there would not have been many omnibus...

Is the label on the back still there and readable. The label I am talking about has the slot numbers and option and board type. Would tell you what was originally present and where. Until about a year ago I had not heard of the PC04R, I thought all of them had both reader and punch. Your...

Make sure the memory thermistor is hooked up to the PS. Someone had disconnected it on my machine and then tuned it. But it would only work for 15 or 20 minutes before everything drifted out of tolerance. I hooked up the therm and re-adjusted and it will run as long as I want. Well, many...