Path: utzoo!mnetor!uunet!oddjob!hao!ames!killer!elg From: elg@killer.UUCP (Eric Green) Newsgroups: comp.sys.cbm Subject: Re: Dead C128 in need of resurrection Message-ID: <3484@killer.UUCP> Date: 25 Feb 88 05:55:13 GMT References: <2706@druhi.ATT.COM> Distribution: comp Organization: Bayou Telecommunications Lines: 34 in article <2706@druhi.ATT.COM>, mab@druhi.ATT.COM (A.Bland) says: > I seem to have accidently shorted user port pins 10 and 11 (both are > labeled 9VAC). Pins C-L (data) and N (GND) were also connected at the > time, but I don't suspect that they caused any problems. If you shorted the 9VAC, you almost certainly blew the 9vAC fuse. I don't know where that fuse is in a C128... maybe it's the one that's in the bottom of your power supply. Take a look, it's right there on the bottom of your power supply. > OK at first, but when I tried to type on the keyboard, nothing happened. > The 80-column cursor was still flashing, however, so I thought the machine > was still somewhat healthy. 80 column chip isn't powered by the 9VAC power supply. However, the VIC][ chip is. Since the VIC][ chip also happens to generate all system timing..... note -- I don't know if the C128's VIC][ still uses the 9VAC (I've blown the 9VAC fuse in my 64 a number of times -- I don't subject my 128 to my hardware projects). Because the 80column cursor is in hardware, it naturally kept flashing, because the 80column hardware had already been initialized. As for CIA's: You might want to lay on a spare. $8.95 from Jameco Electronics, I believe. Since min. order is $20, you might want to grab a spare CPU or something, too (they stock all the Commodore chips for the aspiring Commodore hacker to put his machine back together with :-). Orders 415-592-8097, info 415-592-8121. -- Eric Lee Green elg@usl.CSNET Asimov Cocktail,n., A verbal bomb {cbosgd,ihnp4}!killer!elg detonated by the mention of any Snail Mail P.O. Box 92191 subject, resulting in an explosion Lafayette, LA 70509 of at least 5,000 words.