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Microprocessors. Unknown chip in flatpack package soldered on a board.
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Unknown chip in flatpack package soldered on a board. Comment from Brad Thompson: The chip ... is quite likely a Sylvania SUHL ("Sylvania Universal High-level Logic") IC, an early TTL family. The PC-board frame allowed easy breadboarding and handling for test purposes. As a co-op work student in the early 1960s, I actually constructed a breadboard with a few of these ICs!
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VSS 1 40 Reset Halt 2 39 TSC Phase1 3 38 Not connected IRQ 4 37 Phase2 VMA 5 36 DBE NMI 6 35 Not connected BA 7 34 R/W VCC 8 33 D0 A0 9 32 D1 A1 10 31 D2 A2 11 30 D3 A3 12 29 D4 A4 13 28 D5 A5 14 27 D6 A6 15 26 D7 A7 16 25 A15 A8 17 24 A14 A9 18 23 A13 A10 19 22 A12 A11 20 21 VSS