Re: Apple II Minus Question

["Bill Garber" <willy46pa@comcast.net>]

"Rubywand" <rubywand@swbell.net> wrote in message
403F4795.766A5D83@swbell.net">news:403F4795.766A5D83@swbell.net...
: Bryan Parkoff writes ...
: >
: > Rubywand,
: >
: > Didn't you understand?  I trashed all old 74xxx chips and
: > static RAM chips.  Cleaning chip's pin is not worth.
: > I bought new 74xxx chips and static RAM chips from electronic
: > store a month ago.  They are IDENTICAL to the OLDEST 74xxx
: > chips and static RAM chips.
: > How do I clean each socket's hole (Not Pin)?
:
: Missed the part about chucking all of the 74xxx chips.
: Usually, that isn't a good idea. When you do a wholesale
: swap of so many chips, the chances that a 74xxx on a
: motherboard is bad are about the same as getting a messed
: up 'new' 74xxx chip.

I have a II+ with some new plastic 4116 rams and some of
the old gold pinned rams, and it runs fine. What I mean is
that I agree with Jeff whole-heartedly.

: Since you say the computer acts the same, it looks like
: you lucked out and got good IC's.

I agree again, however, if a new ram is bad and placed into
the very same bank, then it is possible, although highly
unlikely, that a bad ram could still be the problem. Have
you tried running on 4K or 8K ram and NO cards in the slots?

This may or may not help, but I recently received
a Platinum //e in which someone had installed a
Character Generator on a programmed 2732A. It was
a 450ns eprom, too slow for the Apple II to use.
According to my source, 390ns MAX is acceptable.
I found the ROM CharGen, read it, burned it to a
new 250ns 2732A, installed it and VOILA!, the //e
runs like a charm. For clarification, with the slow
eprom CharGen, the //e booted, but nothing displayed
on screen and would not continue after checking the
drive for a disk. Once a good CharGen was in place,
the disk loaded as usual.

Bill @ GarberStreet Enterprizez };-)
Web Site - http://garberstreet.netfirms.com
Email - willy4SPAM6pa@comXcast.net
Remove - SPAM and X to contact me



---
This email ain't infected, dude!

Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.593 / Virus Database: 376 - Release Date: 2/21/04