anti77's latest activity

For 2k games you have to cut the A11 line (pin 6, front, from the right) between the cartridge port and R1, as I had difficulties...

What do you know, it worked right away. Tested so far with 8x2kb rom games that required no RAM. Used 4k7 for the pullups. Even if I...

Unfortunately I don't have any double or quad density disks. In 1541-II drives the masterdata HD ones worked most of the time, if not, I...

I'm trying to format a brand new HD disk (I still have like 200 masterdata ones): HEADER "test",D0,I12 are you sure? yes ready The...

Surprisingly easy fix so far just with two diodes, a bad led driver logic and a capacitor needing reforming.

Reformed the 23000uF capacitor overnight through a 5w 3k3 resistor and 15V. This morning connected it directly to a PSU and slowly...

As I've edited above, I'm fairly sure the one of the rectifier diodes CR5/6 blew/crack, while still remaining operational. Both measure...

I have a 8050 drive in my collection for about 25 years, now that I have a working PET 8032-SK, wanted to see if the two will work...

4 DRAM memory chips replaced until PETTEST completed 16 full memory test cycles. "New" CPU and CPU socket, two new filter caps, all from...

With a multitool I've cut about 15mm from the left plastic mounts, 8mm from the middle mounts, and case closed (literally). The...

Got away easy by replacing only 5. Only 3 needed to be unsoldered. Two were already in a socket. Passed the PETTEST memory test about...

nevermind, this time piggybacking worked, and replacing UA10 now PETTEST is passed the ROM test, now is running the RAM test throwing...

Another PET 8032-sk, board assy 8032030, pettest gave initially: Bad between characters 64 and 127, that was a D6 issues, so I...

Found in the attic an Audio Sonic 1392 Advanced Programmable Video System made by Radofin (sold also as Acetronic, Prinztronic...

Replacing the CPU socket fixed all remaining issues... I remembered the original CPU I removed about 20yrs ago had the legs fall off...