Anyone can help identify this TTL and IBM chips?

[Mizutsuki Raki]

Anyone can help identify this TTL and IBM chips?

I hope know plastic TTL chip's model name (e.g.74LS47... 49XX... etc.)

And... is there any catalogs of IBM custom chips?
These chips are in IBM 5100 ROS(ROM) module.

[Added...]
there is some information on this
http://computermuseum.informatik.uni-stuttgart.de/dev_en/ibm_5110/ibm5100_1.html
page, but link to 'ibmparts.txt' is broken.

[Re-added...]
http://www.kbdbabel.org/kbdbabel-ibm-part-number-list
I googled it, then this document comes out.

Thanks

[UMMR]

Hello,
sadly there isn't a catalog of custom IBM parts.
Based on my personal experience:
the 2 digit pair after "IBM" identifies the manufacturing/assembly factory;
many IBM 14 and IBM 98 chips are MOS devices;
many (not all) IBM 14 chips are memories.
DIPs with custom IBM markings are in fact standard TTLs with customized numbering, they are called Vendor Transistor Logic by IBM.
"Metal can" IBM chips, MST-styled, are usually gate arrays, either bipolar, MOS or CMOS; the 1st line identifies the specific mask used in that chip's fabrication process. The 1st series of IBM MOS arrays is called "Dutchess logic" by IBM engineers.
You can find more infos about IBM part numbering in this page of my website: http://ummr.altervista.org/ibmtechviews.htm.

[Mizutsuki Raki]

[Birdman.]

Are you sure that it's not a problem with dirty connectors or some bad contact in wires?

[UMMR]

Hello
in my personal experience IBM metal-can chips are reliable, check/clean the connectors for dirt and dust.
Also check carefully the connections from the card's PCB to the backplane connector. They are susceptible of oxidation. Remove the backplane connector cap and clean all the contacts.
Several RAM cards from my vintage System/36, not working at first look, "magically" came back to life after an accurate cleansing.
Dust and fragments of that black insulating "foam" widely used by IBM are a great treat for the old systems. Year by year, the "foam" deteriorates in small fragments, like a black dust, or transforms itself in a sticky black mass.
I hope Your 5100 will resuscitate! Great machine!
Paolo

[Mizutsuki Raki]

Thanks to everyone.
I'll clean it and check it twice

(Umm... but ROS error is very common)