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IBM 5170 Motherboard - Chips U87 and U130

U87
U130
Reverse engineering PAL chips


On all three types of IBM 5170 motherboard, U87 and U130 are 'programmable array logic' (PAL) chips.


Chip U87

U87 is marked "1501824" and "(C) IBM CORP".  1501824 is the IBM part number.  (Other IBM part numbers for this part may exist.)

IBM's circuit diagram for the IBM 5170 motherboard has U87 indicated as being type PAL16L8.

Content of the chip

JEDEC file:   ibm_5170_u87.jed source: Johann H.  (jonny64 at the Vintage Computer Federation Forums)
Human readable equations:   ibm_5170_u87.pld source: Johann H.  (jonny64 at the Vintage Computer Federation Forums)


IBM 5170 motherboard - Chip U87.png


Chip U130

U130 is marked "1503135" and "(C) IBM CORP"  1503135 is the IBM part number.  (Other IBM part numbers for this part may exist.)

IBM's circuit diagram for the IBM 5170 motherboard has U130 indicated as being type PAL16L8A.

Content of the chip

JEDEC file:   ibm_5170_u130.jed source: Johann H.  (jonny64 at the Vintage Computer Federation Forums)
Human readable equations:   ibm_5170_u130.pld source: Johann H.  (jonny64 at the Vintage Computer Federation Forums)


IBM 5170 motherboard - Chip U130.png



Reverse engineering PAL chips

In case of interest to you, a web page by Johann H. about reverse engineering PAL chips, is at here.