Recent content by T-Man

If anyone is interested in a non working 7100 cache with its AV9170 shorted to ground, I’ll send it.

Thanks. So it looks like that on chip VDD is shorted to ground. I found another cache and it works fine.

How did it go?

I have a C2N Datasette that will not load tapes. I've looked at the schematics, have put an oscilloscope on the read heads, watched several repair videos/tuning instructions. I also have a working SD2IEC. Why do I care if the C2N Datasette works or not?

Just checking for grounds on the caps and IC's, the small IC in the center on the backside picture has pins 5 and 7 to ground....cannot find a data sheet on it though....the numbers are AV70-1 then 9508 on the IC itself...?anyone know what specifically I should search for to find a data sheet...

Here is the other side. The other chip I guess is the ROM, the machine will boot with the ROM in either slot if the pictured chip is absent.

Is this a picture of the 7100/80 L2 cache? If it is, is it worth replacing for computer function. I have a 7100/80 using the DB15 for video and if this chip is installed the computer will not boot but does boot when I remove it.

No; east TN; I maybe interested in one if you can just ship the board. I have areas of the battery bombed one soaking in WD40; wishful thinking multiple traces seem to be gone.

I have been looking for a Iici locally for several years and actually bought a "lot" of computers to get this one. Even when I heard something shaking around, it still never occurred to me.

Yes....great job. I've done a couple of IIsi and the daughterboard on the power supply slows me to a stop.

Yes...I've seen some dire warnings as far as using an external from a Macintosh on the IIgs, however the unidisk is OK....but not sure now that I've changed the cable.

Maybe helpful

I can confirm the cable on this drive can be replaced with this Apple Iic to Apple Disk II cable and it does work on a Macintosh SE.......this drive should work on both an Apple IIe and Apple IIgs, however, still haven't tried it as fairly paranoid about compatibility/damage particularly after...

Its a few decades late but pretty neat. Thanks to the 8-bit guy (ATTACK OF THE PETSCII ROBOTS) and Scott Robison (C128/dual monitor version. Yeah...it is a blast to play too.

Took the VIC apart....it looks like someone put some serious work into this VIC20.....almost every chip is socketed and apparent nonstandard ROM.