Ksarul

I spent the weekend building stuff for an order from @arcadeshopper, but I finished the last bits of that about 20 minutes ago, so I will get some testing time in the next day or two. . .

Michael Weiand's FIG Forth also came as a cartridge with associated screens on disk at a later point in time (I think it was either V1.2 or V2.0). I think I may have one of the cartridges in my collection. . .

I received mine yesterday. Nice work!

I truly despise the explosive Varta batteries--I like the Vartabomb description. . .

I always thought he was carrying his own head to indicate being a Smart Ass Gamer (or maybe even a Happy Ass Gamer, as the face looks like it is smiling), but then again, I could definitely be wrong. . .and it is definitely an excellent avatar in any event.

Looks like a dentist's worst nightmare though--those gums and teeth don't look at all healthy. . .

The CRU would be the same (>1100). Actually, there is a way to somewhat confirm it as the sidecar controller. The PEB controller didn't exist until 1982. These files are from 1980, which was the year the sidecar controller design was finalized and released. Much of the code for the PEB card is the same though. Major differences are support for double-sided disk drives and even some support for 80-track drives. That last bit isn't active unless you are using a modified DSR, but it was apparently intended to support it, based on the design specs (they are up on WHT).

This may mirror some of the data @FALCOR4dug up on disk DSRs a while back. many thanks for preserving and posting it.

Now we just need a nice label for this one to make some cartridges. . . @iliketurtleswill have a lot of fun with it. . .

Slowly, but surely, the new programmer will do as much as the older ones did--at least for chips that don't need 21-25V to program. I'll be happy when it reaches the point that it will program all of the stuff I regularly program.

You have the perfect housemate--one that actually engages with your hobbies. And can solder too. . .I wish I could get mine to do that, as I'd be able to finish a lot more boards.

As noted on my earlier answer, and confirmed by your pictures, yours should not have any issues with the later power supplies. Your machine definitely has the internal DC supply, and that is the discriminator. The attached picture shows you the type that needs the external DC supply. Note the slide in the cartridge slot. These are the only ones that have issues with the AC supplies. The slide is a volume control slide for the speaker that's under the grille. . .

There were a lot of things that used multiple disks--but in most cases, that was because they were being distributed on SSSD media. Most of the time you could combine them into one disk if you had a DD controller. There were exceptions though--the graphics files for a lot of the graphics utilities really needed to be on one or more disks, separate from the program disk. Also, things like FORTRAN, TI BASE, The Editor/Assembler, and other utility programs strongly suggested your program disk be separate from your data disk to ensure that you didn't accidentally destroy your main disk. Didn't Asgard's Spell Checker require several floppies or a hard disk to work right?

I've bought from @MacRoriein the past--I've never had any problem with his work, or his willingness to identify the sources for hardware he makes that was designed by others.

That is probably exactly the right tool here. The plastic often breaks up if you're doing the cut correctly. Note that you also want to make sure you don't damage any of the windings in there either. This one requires a bit of careful peeling in the indicated area. . .

You might also want to look for Dupont wire cables They come in both male and female flavors. . .

Both versions of the PEB have the external fuses. The older model uses a standard screw-type fuse holder. The newer ones hide the fuse behind the voltage selection plate. If you pull the plate out to change the input voltage, you will see that there is a fuse hidden inside. Note that this fuse doesn't replace the hidden fuse in the transformer--in both cases, it is the external fuse that is expected to blow first, sparing the transformer's internal fuse. Unfortunately, that is not always the case. . .a dead short will pop that transformer fuse in a heartbeat.

I'm definitely interested to see how this one is progressing. . .it has been too quiet lately.

Again, look at the two pictures at the bottom of the page I linked to. It really is BURIED in the plastic. . .towards the bottom of the indicated side, as shown in the first of the two pictures. It is a real pain to get it open and it requires extreme care to avoid damaging things, but the fuse is in there. I attached both pictures here, as they REALLY clarify the issue. . .please read the rest of the instructions on the original link, as it will save you much grief.

That was what I was trying to tell you from the beginning, as your current symptom matches a known fuse problem--your PEB really does have a fuse physically buried in the transformer windings. You can replace the external fuse all you want, but the only thing that works at that point is the fan. Here is a link to the repair instructions. Go all the way down to the bottom of the page and you will find the location of this second fuse. . .and as long as none of the transformer wiring is damaged, it will fix your problem. I have blown one or two of these hidden fuses in PEBs I own over the years--it is a pain to fix, but it really is just a hidden fuse that has to be chipped out and replaced. It would probably make sense to put the replacement in an appropriate fuse holder, but these fuses only blow when something egregious happens on one of the output voltage lines (like a dead short), so it is not a regular thing. Here are the 3A Fast Blow fuses you will need.

That's an interesting weird board set. The bottom board has all of the addressing logic for the GROM space and the boards that plug into the connector have the EPROMs along with what looks like the ROM and GROM select chips (and wiring, as I suspect the wires to either side of the LS42 are setting the GROM select number for the EPROMs).

Note that it proably makes sense to add the possibility of an opening, especially for those planning to use it in TIPI mode--as the SD card slot is in there.

In BASIC, you have to type "OLD DSK0.SCRAM1006" to load that specific program from disk (it replaces the LOAD command used by most BASIC dialects). Note that you don't need the quotes, and everything after the "." is the name of the program you are trying to load. Note also that DSK numbers may change (DSK1., etc.), depending on what you have set up.

Actually, I think ALL of the PEB transformers have a small fuse buried in them. It is usually the first thing to go if a card shorts something on the bus. . .there is a document out there showing where to dig to find it--and how to safely replace it.

Actually, the TMS9919 was a sound chip. . .later called the SN94624.