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You have a Programma 101??? Holy moly! Those things are beyond rare today. I worked with one in a biochemistry lab back in the late 60's. It was the first real computer I'd ever gotten my hands on. Ours even had the outboard sidecar memory expansion unit. And it looked like a computing...

Ya got me there. My oldest is a 1968 RCA CTC-24 "New Vista Color". I pestered my dad endlessly to get this. He was waiting for color TV to be "perfected" first but finally relented. I loved fiddling with the color and tint controls to get the picture just right. The black rectangle at the...

Good progress. My tape drive tries to play for a second when I power up, regardless of the tape. I tried the "Instructional Tape" and a blank tape. I'm wondering if there's a table of contents on some block at the beginning of the tape that it's checking. I haven't tried saving any data yet...

Not surprising, I guess. Your cassette could have either voice or data on it. I said my tape drive was working after I was able to see it FF, rewind, and play. It wasn't until I tried doing a voice recording and playing it back that I discovered it's not so healthy. The playback sounds like...

Wow - a Sparcbook! That is *so* cool! I really craved one of those back in the day but it was just way out of reach. I don't even have 10 really rare computers but my top three would be a Xerox Alto, Xerox D0 Dolphin, and Xerox 1810 Sunrise. The Alto and Sunrise work, the D0 is having...

Actually, this thing had some very cool features that surprisingly still stand up even today. Compared to my smartphone (Motorola Moto G Stylus): Moto runs on battery or plugged in. Sunrise runs on battery or plugged in. Moto has built-in microphone and speaker. So does Sunrise. Moto can do...

Mine came with an Atari power cube part no. C018187, model no. DV9319A marked "Use only with model CX-5200". It's rated at 11.5 VDC, 1.95A. It looks like an ordinary 5 mm. barrel connector. The polarity is center-positive.

BINGO! That's just what I was looking for. Big thanks for that one :)

Yeah, Sunrise Systems was formed as a spin-off when Xerox decided they didn't want to pursue the project. There were some made at Xerox's Dallas plant. The 1850 would be cool (if I could find one) but knowing the protocol of the DB-9 external interface might let me connect an outboard floppy...

I just got a Xerox 1810 Sunrise portable computer from 1983. It's in really excellent shape. The LCD works, the micro cassette drive works, the speaker works, even the NiCd battery works. I set the current date yesterday and it remembered it today. Only problem is I can't figure out *how*...

There's a vaguely simlar thread here: https://answers.microsoft.com/en-us/windows/forum/all/function-keys-are-being-implemented-automatically/b975642e-7167-4dca-b0ba-79ddc4724a30. They recommend running the Hot Key utility, which I have done (HKServ.exe) and the Fn keys still don't work. Are...

Thanks. I downloaded that but I'm still not sure what to do with it. There's files in there with names like "PK-000099-01.exe" whose usage is unclear. I tried running C:\Program Files\Sony\Sony Notebook Setup\SNSetup.exe but it crashed. There's C:\Program Files\Sony\HKServ.exe whose icon is...

I have a Sony Picturebook PCG-C1MR-BP. This is a Japan edition with hiragana characters on the keytops as well as Roman characters. It originally came with Japanese Windows 98. Someone upgraded it to Windows XP Pro, OEM US version before I bought it. While it's nice to have, none of the...

Hah - yes indeed, I remember using those in those days :-) I was doing data visualization for a physics lab. The physicists didn't like having to wait a day for their jobs to run on the drum plotter connected to the IBM 360 so they got a couple of those Tek terminals. With those, they could...

Well all of the schematics for the entire D0 (at least the original version) are freely available on bitsavers, so it's not impossible. You could probably do one on an FPGA. Now that would be cool. An 11/70 clone would be pretty cool too. I'd like to see that!

Heh - that's what I'm doing, but it's slow going. There are a few chips that only have Xerox proprietary numbers on them, there are some PROM's on there, it's a four layer board and everything is soldered in place. I've started a KiCAD project for it but I don't know if this is really going to...

Thanks but that's the schematic for the original 1979 D0EN board. The one I have is the 1980 D0EN2 board which is a major revision and has about 30 more chips on it and a completely different layout. It's very odd that the documentation for the newer board seems to have vanished without a trace.

Note also that CRT's should *always* be shipped with the screen facing down. The weight of the yoke hanging on the neck (the most fragile part of the tube) is an invitation to bust it off with a good jolt on a CRT in normal viewing position (screen facing forward). That picture was painful to...

In any electronics this age, electrolytics are always a prime suspect but to check them properly you really need an ESR meter. They're all over Ebay and not expensive.

I vote for a NiCd battery too. The third wire might be for a temperature sensor. I can't imagine this part being a capacitor. I've never seen a cap that shape, and this sortof device wouldn't need a cap that big anyway. I also agree that the number is more likely a date code than a part number.