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I have an atari 800 that had a switch with the wires broken just under the cartridge cover and a pushbutton on the right side panel. I'm trying to figure out if this is a repair or some sort of freeze/reset mod. The 2 wires on the first pic go to the button on the side. The wires on the chip...

Before I start tearing things apart too much, I would see if either of these screens show any particular common fault on these machines. Thanks in advance!

Hi, I have Sergey's card and an XT-IDE in my 486 system. It doesn't seem to matter if I configure drives 3 and 4 on the second FDC or the first, it appears as though it's trying to make my 3rd drive Drive C, which is preventing my XT-IDE from booting. The documentation seems to suggest that...

The day after filming, I got a nicer C64 donor system for $20, so I have my better case. I also picked up an Atari 800XL and MSX2+ for $100 each. So now the only thing on my wish list is one of the more classic (4032 style) Commodore Pets.

I know there are several legends out there that sell replacement PCBs for coco keyboards, but I'm wondering if there are any open source solutions to DIY some. I have several to replace, so I thought this might be the better option. Thanks in advance.

Hi, I've been working on getting my XTIDE working on the RLX-B (a machine that has a lot of oddities if you're not using the original hard disk/floppy. I'm wondering if anyone has a bios dump from the ST 93CS56 chip that stores the settings. I need to do a little reverse engineering.

Is there a preferred way to route the hard drive cable for the m4 to an internal FreHD?

Does anyone have a pinout of the 6 pin connector that goes from the motherboard to the video board for the 4d? On my board it's J8. It's a suprisingly difficult thing to google :)

Booting from LS Dos 6.3.1 with the FreHD drivers after entering the data and time, it just keeps repeating 11H. Does anyone have any idea what this means?

Does anyone have any info on what has changed in the various FreHD revisions. I have 10x 3.01 boards which differ slightly from the BOM that was included in the zip file. Someone mentioned that one revision had a backwards transistor footprint. I guess what I'm trying to figure out is: Is...

I have a standard model 4 that is giving me the raster when I turn it on. Holding break does not give the cassette message. Hitting enter and typing cload doesn't seem to do anything (no relay click). However a normal boot, the floppy drive spins for a few seconds and powers off. If I put a...

Obviously the people who have made the alternative firmwares for the Goteks have done a ridiculous job. As I look at things like screens and even OSD on the amiga, I'm wondering. Is all this data sent over some sort of parsable bus? Is it being printed as serial data somewhere or something...

Sorry for the noob question. For things like my TRS80 machines I use a program called ImageDisk to write images and it works really well. However my Zorba CPM machine can't read anything I write using this method. I have some Zorba IMD images and they appear to write properly, but I must have a...

I've had a new PC (to me) PCjr for the last year or so. It's pretty immaculate. I just didn't have a power brick. I just picked up a NOS power supply and power brick from someone who went to the computer reset closeout. After hooking it all up, I have nothing on the screen. The screen does...

I figure I'll toss this out there, hoping maybe some grizzled vet has run into this issue. I refurbed a Model 4 and the cover won't go back on, lol. It feels like something is catching in the back right or right back, but I'm just not seeing it. It gets about 4 inches from it's final resting...

Everything with these (and most old computers) starts at the PSU. Problems seem to go away when clean power is supplied, even when a PSU appears to be good (under load and without a load). That said. 1. Does anyone know of a PCB or Cable that will hook one of these up to an ATX power supply...

Last one of the day! The title pretty much says it...I can adjust the bright/contrast to get the screen to go green. The floppy spins for 3 seconds, but no prompt or anything. I deoxited and reseated everything that could be. Checked as many cables as possible. cleaned what could be cleaned...

I'm working on a few model 4's today. This one is a 4D and it was working nicely, however after I went to put a gotek in it, it stopped powering on and it sounded like the relay was clicking every second or so. The PSU looks fine, but I'm sure that behavior is something common. Not enough load...

Hi everyone. I've been doing my first work on the model 4 and I got to the point where something is coming up on the screen, except instead of seeing the message about inserting a floppy, I'm getting these crazy characters. Does anyone recognize the problem or have a point in the right direction?

I'm assuming there are some TRS experts here who are going to know what this is right away. I'd guess ram or something like that, but before I get poking around, does anyone have a point in the right direction?