Search found 28 matches
- Sun Mar 11, 2007 5:05 pm
- Forum: Commodore Discussion
- Topic: CBM 4032 better but still no image.....
- Replies: 6
- Views: 35909
Hmm. I'm confused. Sorry, but you're really not being clear enough regarding the symptoms. Some of my questions were intended to see if the computer was actually working, and it's still not clear. 40 straight vertical lines on a working computer suggest either a bad character generator - or even a p...
- Sun Mar 11, 2007 3:36 am
- Forum: Commodore Discussion
- Topic: 6550 memory chips
- Replies: 2
- Views: 7418
Dunno off hand, but might want to see if it was used elsewhere though - you might be shocked. For example, the 2114 although it hasn't probably been produced since I was a lad is still suprisingly common - found, and usually socketed no less - in old PC cards. Value Village is as valid a hunting gro...
- Sun Mar 11, 2007 3:24 am
- Forum: Commodore Discussion
- Topic: Chicklet PET
- Replies: 13
- Views: 22395
Yes, beauty IS in the eye of the beholder. There is no comparison as far as functionality is concerned between the generic box that I type this reply on and anything that C= once produced. But lets face it... In the last year I'll bet I've walked by scores of tower cases in the trash with nary a sec...
- Sun Mar 11, 2007 1:54 am
- Forum: Commodore Discussion
- Topic: EPROMs
- Replies: 4
- Views: 11288
- Mon Mar 05, 2007 8:56 pm
- Forum: Commodore BUY / SELL / GIVEAWAY
- Topic: Fusecap 8032 SK missing
- Replies: 4
- Views: 11765
- Mon Mar 05, 2007 8:44 pm
- Forum: Commodore Discussion
- Topic: CBM 4032 better but still no image.....
- Replies: 6
- Views: 35909
- Sun Mar 04, 2007 12:04 pm
- Forum: Commodore Discussion
- Topic: + and - side capacitor ?
- Replies: 1
- Views: 5767
It's always best to work with the circuit at hand - without silk screened markings follow the traces to determine relative polarity. With that said, If YOUR C-25 is right beside the heat sink, and in series with diode CR-12, then the positive side is toward the diode - the rear of the board. This co...
- Fri Mar 02, 2007 8:26 pm
- Forum: Commodore Discussion
- Topic: EPROMs
- Replies: 4
- Views: 11288
Hi Mark. three hurdles to overcome and I can do two. The ROM sockets meant to take the 2332 will accept a 2732 eprom with a bit of massaging. Pin 18 and 21 need to swap places between the EPROM and the board, and what to do with pin 20 seems to differ with different boards (On one particular 2001 bo...
- Sun Feb 25, 2007 2:47 am
- Forum: Commodore Discussion
- Topic: Bad sockets on 2001 board
- Replies: 1
- Views: 5935
Bad sockets on 2001 board
Interesting weekend. been pulling my hair out trying to bring a pair of 2001 boards back to life. One suspected bad main ram, the other the 74244 bus buffers on the CPU address bus or the 74154 rom select mux. 6 hours later the culprit on the latter was pin 18 on one of the rom sockets. it looks sea...
- Sat Feb 24, 2007 6:01 pm
- Forum: Commodore BUY / SELL / GIVEAWAY
- Topic: CBM 4032 - no image - C25 resistor / inductor ?
- Replies: 6
- Views: 14117
Of the two schemmy's I have, one for an older 2001-8-N, and one for a newer dynamic board (likely closer to yours) - C25 in the former is a tantalum cap in the linear regulator circuit, and the latter it's a bypass/decoupling cap in main RAM. In neither case would this prevent the machine from booti...
- Fri Feb 23, 2007 9:03 am
- Forum: Commodore BUY / SELL / GIVEAWAY
- Topic: CBM 4032 - no image - C25 resistor / inductor ?
- Replies: 6
- Views: 14117
- Fri Feb 23, 2007 8:29 am
- Forum: Commodore BUY / SELL / GIVEAWAY
- Topic: PET is working but.......
- Replies: 11
- Views: 21111
- Thu Dec 28, 2006 9:01 pm
- Forum: Commodore BUY / SELL / GIVEAWAY
- Topic: Looking for a working Commodore 64 Unit
- Replies: 4
- Views: 10458
- Mon Dec 25, 2006 9:31 pm
- Forum: Commodore BUY / SELL / GIVEAWAY
- Topic: PET part
- Replies: 5
- Views: 12905
- Sat Dec 23, 2006 1:11 am
- Forum: Commodore BUY / SELL / GIVEAWAY
- Topic: PET part
- Replies: 5
- Views: 12905
Still in need? Where you at? Unsure of part numbers (I had always thought they were the same but used different taps depending on the screen size) but I have one from a 9000 and one from a 2001.
[email protected] if you're still short.
[email protected] if you're still short.