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I recently "fixed" my C16. And by "fixed," I mean I tried to replace the 8501 with a 6510, only to discover that the replacement ROM chip was not working. Replacing with the original ROM and CPU brought it back. I tried multiple 6510s and all had been tested in multiple C64s. So I'm...

Any idea what might be causing this? I've replaced the TED (new/old stock), PLA (PLAnkton, CPU (6510 w/ adapter), Kernal ROM (had to because of the cpu). This screen has shown up before, but it used to boot at least some of the time. But it was glitchy (printing random characters on the...

I've been taking an online class, and since everyone else has set up their little backgrounds, I decided to put some of my vintage computers in mine running some looping BASIC programs on a green phosphor CRT. Obviously, since the classes run for a few hours, I don't want anything too static...

I've been working on this board for some years now. Worked fine for a long time then stopped. However, I think I've narrowed in on the issue, I just don't know what's causing it. Using a Ray Carlson PSU, the 9v line puts out about 9.5 to 9.6v consistently. This is verified when plugged into the...

So I have three green phosper displays that need a recap. The first is an Amdek 300, the second is an Apple Monior ///, and the last is a Kaga KG-12NU. I also have an Apple Monitor II (the one with a tilt screen) that will fliker initilly, if left idle for an extended period, but stabolizes...

I got an Alspa ACI-2 a few weeks ago thinking it was just a dual 8 inch floppy enclosure, only to discover it was a full CP/M computer. Unfortunately, the main power supply had been stripped, and the most of the case screws are missing. However, as luck would have it, I managed to find the...

Recently got a Rev.2 Apple II board. Originally had AppleSoft ROMs, But the AutoStart had a bad pin (broke off) so I replaced them with an Integer set I had on a II+ board. The board boots to the Machine Monitor, and with a ROM switch card (AppleSoft onboard) in Slot 0, it will go to BASIC. I...

Just what the title says. I like Tetris and I have several TRS-80 Model 1s (as well as a Model III) and I'd like to enjoy the combination someday. After all, if this thing can do Zaxxon, Tetris shouldn't be that hard. However, the only version I've found is for the Model 4... So not so...

I was thinking about using this for an Apple 1 clone, but (first) I don't know if that's even possible. I mean, it probably is. The board looks pretty customizable, with the ability to add or remove switches as needed, but I would need to connect it to another encoder board. But before I do...

Just as the title says. Overall, it's working well (although it was a revolting mess inside). Also, I had to replace the plug on the monitor. But having fixed that (and cleaning out all tthe filth inside), there is one issue. The latch that holds the tape deck closed is broken (the hook was...

I recently got an Ico Icobus dumb terminal, model 757-14, and I know nothing about it! Even the All Mighty Google has pretty much failed me, as the only reference to it was a single ebay listing for the same unit (minus the keyboard) for more than $900. Somehow, I don't think they're going to...

Just as the title says, it was working perfectly, and then it wasn't. Drive 1 spins, Drive 0 does nothing. It doesn't matter which drive is Drive 1. I looked up the error code and learned that it is either the 5630 or 6504. Unfortunately, I have no idea where to get the 6530. I checked eBay...

How do I exit "Graphics mode" on my 8032? I figured out that typing ?CHR$(142) gets me into it and ?CHR$(14) gets me out. But CHR$(142) can also be done by enguaging the Shift-Lock and pressing SHIFT-/? followed by SHIFT-2". I want to know the corresponding key command for ?CHR$(14)...

As the title says, TRS-80 model, pretty much stock. 1978 date codes, original High-tek keyboard, cassette mod (RadioShack installed), and Level 2 BASIC in 2 ROMs on a daughter board. Catalog number 26-10044D-1. As far as I can tell, it's never been messed with aside from a minor repair for...

Once again, the title says it all...

Just as the title says, sadly, the monitor was smashed into dozen pieces. Lots of rust, but amazingly, the CRT looks to be intact!

So anyone who has encountered my most recent posts on this forum probably figured out that I've recently acquired a few MS-DOS based machines as of late. An XT, a Tandy 1000EX, and most recently, a Compaq Portable. Unfortunately, with the exception of the XT, most of these are dependent on...

I got a Compaq Portable and it won't turn on. The fan goes, but that's about it. I began by removing all the ISA cards, but no luck. Then I unplugged the power to the floppy drives and tested for shorts between ground and the power lines. All toned out. So then I removed the motherboard...

So I've been on a bit of a repair kick lately, and am now turning my attention to one of my more stubborn machines. It's a later Commodore PET, model CBM 8032. When I got it, its power cord had been chewed through near the base of the machine, and the stem on the CRT had been broken off, just...

As the title says, I just received a Mattel Aquarius but it isn't working. The power light comes on. It responds to the RESET button. But all I get is a garbage screen. I tried reseating the only socketed IC (I think it's the ROM), and tried booting without it. The only difference was...