Editing IBM PALM processor (section)

==== Other identified board devices ====

Three smaller devices are visible in the upper-middle region of the J2 card, between the row-1 and row-2 Dutchess arrays. These are the '''3 conventional TTL DIPs''' referenced by Wikipedia and PC Magazine.

{| class="wikitable styled-table" style="width:100%;"
|+'''Smaller ICs on the PALM board (transcribed from the J2 card photograph)'''
! Position !! Marking !! Device type !! Notes
|-
| Upper-middle, left || '''210086-C''', LC 7676.20, 7828 CT || Small DIP || Function not identified from photograph alone
|-
| Upper-middle, right || '''M-210086-C''', LC 7676/20, 7825 2 CT || Small DIP || Same base part number as above; "M-" prefix variant
|-
| Top-centre (green-marked) || Round metal-can with green dot indicator || Crystal oscillator can || Most plausibly the '''15.1 MHz master oscillator''' that produces the 66.2 ns clock pulse. The green dot is consistent with an IBM marking convention for tuned / specified crystals
|}

The "210086-C" and "M-210086-C" markings appear on small DIPs with date codes 7825 / 7828 (the 25th and 28th week of 1978), which is consistent with this specific J2 card being from a 1978 5110 — the date codes are slightly later than the row-1 gate array codes (which include weeks 841, 842, 843, 844, 847, 849 of 1978 by the "1-yyy" convention).

The Stuttgart photograph also shows a board edge marking '''16078496458VG41''' (probably an IBM card serial / FRU number) and additional small surface-mount components and decoupling capacitors near the right edge of the board.