Al, I re-read your question and think you are referring to the manual I am
looking for. I don't have the part number but I think it might be this:
https://www.computerhistory.org/collections/catalog/102665239 What I had
was the " 5110 System Logic manual" that was a solid block. Sadly, I threw
The manual with the schematics was at the back part
of SY31-0405-3_IBM_5100_Maintenance_Information_Manual_Oct1979.pdf. PDF
page 299 has the keyboard schematic/diagram.
On Thu, Jun 17, 2021 at 4:15 PM Al Kossow via cctalk
wrote:
> On 6/17/21 1:10 PM, Santo Nucifora via cctalk wrote:
> > One of
On 6/17/21 1:10 PM, Santo Nucifora via cctalk wrote:
One of the 5110's I acquired
had a full set of manuals but they were water damaged and the schematics
manual was one solid block of paper with all pages stuck
together
what was the part number of that manual?
To provide an update on the repairs so far, I've been able to save a few
boards while others are waiting for parts.
I was able to save a display card (I have two bad ones and one is waiting
for parts) and an APL ROS card which is really great. All by replacing
some bad TTL logic chips. I still
Den lör 12 juni 2021 kl 10:54 skrev Christian Corti via cctalk <
cctalk@classiccmp.org>:
> On Fri, 11 Jun 2021, Santo Nucifora 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
On 6/12/21 1:58 AM, Christian Corti via cctalk wrote:
> On Sat, 12 Jun 2021, Tony Duell wrote:
>> I wonder if in the original list, a '1' was misread as a '7' or vice
>> versa. I am told that in some countries the '7' is conventionally
>> written with a crossbar across the downstroke to avoid
Thanks for that link Christian.
I've seen your list before but couldn't find it and the website I got this
transcribed list from is long gone. I'll check your list against what I
have and make sure the one I have posted is accurate and post a link to
yours, if that's okay.
Santo
On Sat, Jun
On Sat, 12 Jun 2021, Tony Duell wrote:
I wonder if in the original list, a '1' was misread as a '7' or vice
versa. I am told that in some countries the '7' is conventionally
written with a crossbar across the downstroke to avoid this. My father
always did this, for all it is not common in
On Fri, 11 Jun 2021, Santo Nucifora 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
On Sat, 12 Jun 2021, Tony Duell via cctalk wrote:
In both cases it would require an input pin to become an output,
something that I can't see how it would happen.
I wonder if in the original list, a '1' was misread as a '7' or vice
versa. I am told that in some countries the '7' is
On Sat, Jun 12, 2021 at 12:39 AM Jon Elson via cctalk
wrote:
>
> On 6/11/21 3:22 PM, Santo Nucifora via cctalk wrote:
>
> The 74151 is an 8:1 multiplexer with complementary outputs.
>
> The 74157 is a quad 2:1 mux.
>
> I can't imagine any defect that would cause one to test out
> as the other.
On 6/11/21 3:22 PM, Santo Nucifora via cctalk wrote:
The 74151 is an 8:1 multiplexer with complementary outputs.
The 74157 is a quad 2:1 mux.
I can't imagine any defect that would cause one to test out
as the other.
Jon
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,
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
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
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