Parts for CS/A VDC40/80 board, version 1.3 ------------------------------------------ IC 1 6545/6845 CRTC 2 74LS138 3 74HCT688 4,10 74LS374 5,6,11,12,15 74LS257 7 74F245 8,9 41464 4*64k dyn. RAM, 120ns access time (or better) 13 2764 character generator ROM 14 74LS166 16 74LS175 17 74LS86 18 74LS74 19,22 74LS04 20,23 74LS00 21 74LS32 P 1 CS/A bus connector 2 D-Sub 9 pin female C128 VDC exit - alike 3 1-pin charrom switch PET emulator R 1,5 220 2 10 3,4 47 C 1-23 60-100nF decoupling C between Vcc and GND 24 100uF J 1 3-pin memory address range 0x01**** or 0x03**** 2 3-pin i/o address range 0x88* or 0x89*