The following is (hopefully) the correct dip switch settings for the AT&T 6300PC and Xerox 6064. The Dip Switches on the Olivetti mother board are layed out as follows: ____ ________ ________ ____| |_________________________| |____| |____ | kbd ____ ____ ____ ____ lpt1 com1 | | |____||____||____||____| | | ________ ____ ____ ____ ____ ____ _____ ____ | | | ||____||SW-1||____||____||____||_____||____| | | |________| | | _____ ____ ____ ____ ____ _____ ____ | | |_____||____||____||____||____||_____||____| | | | | _________ ____ ____ ____ ____ _____________ | | | | |____||SW-0||____||____|| | | | |_________| |_____________| | |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/| Memory: ------- 128KB on mother board --------------------- dip switch 0: On 2 3 4 X X X X Off 1 X X X X 256KB on mother board --------------------- dip switch 0: On 1 3 4 X X X X Off 2 X X X X 384KB total memory 256KB on mother board + 128KB on expansion board ------------------------------------------------ dip switch 0: On 3 4 X X X X Off 1 2 X X X X 512KB on mother board --------------------- dip switch 0: On 1 2 3 X X X X Off 4 X X X X 512KB total memory 256KB on mother board + 256KB on expansion board ------------------------------------------------ dip switch 0: On 1 2 4 X X X X Off 3 X X X X 640KB on mother board 512KB motherboard bank 0, 128KB mother board bank 1 --------------------------------------------------- dip switch 0: On 2 3 X X X X Off 1 4 X X X X 640KB on mother board 128KB motherboard bank 0, 512KB motherboard bank 1 -------------------------------------------------- dip switch 0: On 2 X X X X Off 1 3 4 X X X X 640KB total memory 256KB on mother board + 384KB on expansion board ------------------------------------------------ dip switch 0: On 2 4 X X X X Off 1 3 X X X X 8087 Coprocessor: ----------------- 8087 NOT installed ------------------ dip switch 0: On X X X X 5 X X X Off X X X X X X X 8087 installed -------------- dip switch 0: On X X X X X X X Off X X X X 5 X X X Serial communication controller type: ------------------------------------- 8250 installed -------------- dip switch 0: On X X X X X 6 X X Off X X X X X X X Z8530 installed --------------- dip switch 0: On X X X X X X X Off X X X X X 6 X X 4K x 8 or 8K x 8 ROMs installed: -------------------------------- 4K x 8 PROMs installed ---------------------- dip switch 0: On X X X X X X X 8 Off X X X X X X X 8K x 8 PROMs installed ---------------------- dip switch 0: On X X X X X X X Off X X X X X X X 8 * NOTE * Position number seven (7) on dip switch 0 is not currently used. 96TPI or 48TPI diskette drives: ------------------------------- 96TPI drives ------------ dip switch 1: On X X X X X X X Off 1 X X X X X X X 48TPI drives ------------ dip switch 1: On 1 X X X X X X X Off X X X X X X X Diskette drive startup speed: ----------------------------- Slow startup (500ms) -------------------- dip switch 1: On X 2 X X X X X X Off X X X X X X X Fast startup (0ms) ------------------ dip switch 1: On X X X X X X X Off X 2 X X X X X X Hard disk type: --------------- Uses external hard disk code ---------------------------- dip switch 1: On X X X X X X Off X X 3 4 X X X X Uses internal hard disk code ---------------------------- dip switch 1: On X X 3 X X X X Off X X 4 X X X X Reserved setting for future use ------------------------------- dip switch 1: On X X X 4 X X X X Off X X X X X X X Display type: ------------- Reserved setting for future use ------------------------------- dip switch 1: On X X X X 5 6 X X Off X X X X X X Monochrome display ------------------ dip switch 1: On X X X X X X Off X X X X 5 6 X X 40 x 25 line setting with mono/color display controller ------------------------------------------------------- dip switch 1: On X X X X 6 X X Off X X X X 5 X X 80 x 25 line setting with mono/color display controller ------------------------------------------------------- dip switch 1: On X X X X 5 X X Off X X X X 6 X X Number of diskette drives installed: ------------------------------------ One diskette drive ------------------ dip switch 1: On X X X X X X 7 8 Off X X X X X X Two diskette drives ------------------- dip switch 1: On X X X X X X 8 Off X X X X X X 7 Three diskette drives --------------------- dip switch 1: On X X X X X X 7 Off X X X X X X 8 Four diskette drives -------------------- dip switch 1: On X X X X X X Off X X X X X X 7 8