UMC UM6116-2 2K x 8-Bit High Speed CMOS Static Ram SRAM 24-Pin IC Chip @CPUCF

HD74S181P Hitachi 4-Bit Arithmetic Logic Unit ALU 16 DIP-24

Pair Hitachi HM6116P-3 2048 Word CMOS Static Ram SRAM 24-pin IC Chip @CPUCF

NEC D446C-3 Parallel Interface Unit 24-Pin IC Chip @CPUCF

Texas Instruments SN74LS181N Arithmetic Logic Unit 4-Bit DIP24 - New

DM74S181N National Arithmetic Logic Unit, S Series, 4-Bit, TTL, PDIP24 IC

Intel P8051AH 8-Bit Microcontroller MCS-51 40-Pin IC Chip @CPUCF

Pair NEC D8253C-2 Programmable Interval Timer 24-Pin IC Chip @CPUCF