Recent content by JC8080

I definitely should have looked at the board more closely before I ordered the cap kit. If I am going to recap a machine and am buying other components at the same time I go through Mouser or DigiKey, usually if I am recapping a machine and not buying other components I use Console5 since it is...

My first PB100 I replaced all the caps. I didn't read the info with my Console5 kit closely and didn't realize it did not include all the caps, so I ended up having to find the others somewhere else. Replacing all the caps did fix that machine. I guess we'll see if replacing all the caps except...

The Console5 cap kit for the PB100 says there are 6 caps that are polymer caps from the factory and do not need to be replaced, so they are not included in the recap kit. Looking at my board those specific 6 caps don't look any different from regular electrolytic caps. My experience with modern...

Consider picking up a random garbage board from the same era and practicing on that first. It would be a shame to damage the Plus board, even though it would be tough to do too much damage removing the CPU and installing a socket. If you have an electronics recycler near you they probably have...

This is a Total Systems Mercury with the RAM expansion board. I have problems with it without the expansion board installed. Previously it was working fine, which is odd. The machine also works great with my Performer clone. That's odd you are having problems with your Performer clone, I have...

After more testing I think the problem is with the accelerator. I don't think there was ever a problem with the mouse button, I think the system was freezing right after booting to the desktop and the cursor was still able to move, but everything else was frozen.

I checked continuity from pin 7 of the DB9 connector to pin 13 on the VIA and it is good. One of the DB9 connector solder joints looked a bit dodgy (not pin 7) so I went ahead and re-flowed them all. The mouse button works now, though I have some other odd stuff going on that I'm sure is...

Thanks for the info and schematic, I'll get out the meter later and check.

Yes I should have been more clear, the pointer works properly, there is just no response when the button is clicked. I tried repeatedly clicking the button while I wiggled the mouse cable at both ends to check for an intermittent connection, the system never registered a click so I don't think...

I just set up my Plus and found that the system no longer recognizes the mouse button. I checked with a meter and confirmed the button is functioning properly. I recently had the machine apart and had the logic board out to install the diode needed to power the external SCSI port and found the...

I have a working board with the RAM expansion. If you decide to base something on this design and run into a roadblock where having access to a working board would help, and you are in the US, let me know and I would be willing to loan it out for nondestructive reverse engineering.

Plus accelerators are hard to find, and expensive when they do come up for sale. The MicroMac Performer clone will work with a Plus, though it is more complex than using it with an SE, because the Plus does not have an expansion slot. Here is a writeup I did on a Performer clone build, I talk...

Have you tried the Plus keyboard on the 128k? Do all the keys on the 128k behave the same? I have never had one of those mice apart, but I would start by putting some deoxit into the switch contacts and see if that fixes the mouse. Definitely don't start looking for replacements yet.

If you haven't already, look at btbs other post where he links to his redrawn schematics.

Great work. Those schematics look nice, maybe there is hope for my Classic II after all!