DD1 74F04
DD2 K155TM2
DD3 74LS193 National Semiconductor
DD4 74LS193 National Semiconductor
DD5 74LS08 Goldstar
DD6 K155TM2
DD7 74LS193 National Semiconductor
DD8 74LS193 National Semiconductor
DD9 K155TM2
DD10 74LS10 Texas Instruments
DD11 CD4520
DD12 74HCT86 Texas Instruments
DD13 74LS253
DD14 74LS253
DD15 74LS257
DD16 74LS257
DD17 74LS257
DD18 Z8400A Z80A CPU Zilog
DD19 74F32 National Semiconductor
DD20 74LS138 Renesas
DD21 74HCT02 Texas Instruments
DD22 K155TM2
DD23-30 KM4164B-12 Samsung
DD31 74LS298 Texas Instruments
DD32 74LS298 Texas Instruments
DD33 74HCT02 Texas Instruments
DD34 74LS257 Signetics
DD35 74F373 Texax Instruments
DD36 74LS174 Texas Instruments
DD37 72LS295 SGS
DD38 72LS295 SGS
DD39 72LS295 SGS
DD40 74LS257
DD41 74LS08 Renesas
DD42 74LS257
DD43 4049
DD44 74HCT86 Texas Instruments
DD45 74LS08 Hitachi
DD56 74LS05 Texas instruments
DD47 74LS04 Texas Instruments
DD48 Eprom