11 Jun
2021
11 Jun
'21
1:32 p.m.
Thank you for the quick reply. As soon as you wrote that, I checked my
list again and I have two entries for 74151. The other is 2392121 which I
assume is the right one?
Would you mind sharing your list? I can cross-reference and see how
accurate mine is.
Thanks again,
Santo
On Fri, Jun 11, 2021 at 4:29 PM Paul Berger via cctalk <
cctalk at classiccmp.org> wrote:
My reliable list says your cheap logic tester is right
1582601 = 74157
Paul.
On 2021-06-11 5:22 p.m., Santo Nucifora via cctalk wrote:
I am currently working on an IBM 5100 that has
some issues. I know for
certain that the 5100 has a bad graphics controller card so I need to dig
into component level replacements for those ICs I can replace. I have a
list of logic chip equivalents to the IBM part numbers that are written
on
the chips but I don't think it's 100%
accurate because IBM part number
1582601 comes back as 74151 "DATA SEL/MUX" but when I use one of those
cheap logic chip testers (that is surprisingly accurate), it comes back
as
a 74157. For the record, if I test a 74151, it
comes back as a 74151 so
the
tester is correct. I just want to make sure the
table I have is accurate
and that the tester is not 100% accurate or if that chip has failed and
tests like a 74157 in it's state.
This is the current list I am using that I got from somewhere but I don't
recall where:
https://vintagecomputer.ca/ibm-vintage-logic-chip-equivalency-list/
Does anyone have an IBM logic chip equivalency table for 74 series logic
chips?
Any help is much appreciated.
Santo