Recent content by Formulator

Got around to pulling this and snapping a couple pics. I have the documentation that came with this somewhere. Will post that soon.

This is a pic I had on hand when I first opened the unit a few years back. I can get a better pic if needed. I will report back with findings about U9 & U10. Thanks.

On the system PCB there appears to be a 2.4V 50mAh Ni-Cd battery for the clock/calendar. You can see it hiding under the main battery compartment in the image. Can anyone recommend a safe and modern replacement for this type of battery? Unexpectedly, this unit had the 384k RAM upgrade...

I have a Kaypro 4/84 Plus 88. It is exhibiting a new issue in which some of the characters appear broken, particularly on the right side of each character, and some have portions that appear more dim as well. I have attached a sample image of the display. This is again a new issue and has...

I still have not yet stopped by there since the liquidation, but hope to before it is too late. I am somewhat curious to see the building when it is close to empty. After digging through a pile of business cards I did find this: On the back was hand written "jenesaispas1f" which I believe...

Vintage NEC Versa M/75, ABQ, NM 😉"Maxwell Smart Style"😎 Vintage NEC VERSA M/75 With Power Adapter Fully Functioning No Additional Software Is Included Text Is Preferred Calls Please Leave Message $79 OBO Cash n Carry @ 4th & Griegos NW FiveOh5Six8181One3 Thanks For Looking!

I did notice the Turbo Pascal disk 2 JPG was not correct, here it is now.

I expected this day would come. I have shopped there for parts for many years, very sad to hear of Richard's illness. Richard also ran a U-HAUL business inside the warehouse and drove a wood-paneled station wagon. I remember the first time sifting through the "drive" room getting numerous bug...

Recently obtained a lot of original Osborne 1 disks (18 in total), some SD, some DD from a local estate sale. CP/M system disks, utilities, Supercalc, etc. I would like a way to test the images I have dumped, as I do not own an Osborne. I dumped them using a Kryoflux and converted them to .IMD...

Looking to replace this quite noisy fan. Any suggestions that have worked well for others? Also, it seems that when installed properly the fan is pulling air into the case and seems to me it should be the other way around, but I don't know for sure with this machine.

I replaced some on my Kaypro 4 from here: https://www.tubesandmore.com/products/switch-replacement-boss-effects-pedals Same switch. Of course, I had to carefully remove the broken portion from the keycap but it worked well and the keys fit properly again. I used micro drill bits with a head...

I would also like to take my 4/84 Plus 88 in this direction with ROM enhancement and FreHD. Any different considerations given the Plus 88 upgrade in place? I haven't budged the Z80 daughterboard loose but I suspect I may need to at some point.

Chuck, thanks for the response. I have to say though that I am not entirely certain that there is enough information on the diskettes themselves to distinguish which system they are intended for; however someone with more knowledge may be able to do so. This link however has helped with the...

Here is a PSU from a PB300 386SX desktop. At first the 12V rail was reading only ~10V so I took a peek inside to see if adjustment could be made. There was a small dial but the head rather easily snapped off. Now the PSU will not output any voltage. Other than replacing the part I do not...

A quite clean system, but sadly will not post. Has LED display and speaker toggle. RAM tested OK in other system, (except for one DIMM from empty socket). I suspect issue is with the InSTEP 387 upgrade board. Since this was originally a 286 board, I want to verify which type of alternate CPU...