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10 IT\'S THE FINAL COUNTDOWN20 FOR C = 1 TO 230 DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NAAAA40 DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NA-NA-NAAAAA50 NEXT C60 NA-NA-NAAAA70 NA-NA NA-NA-NA-NA-NAAAA NAAA-NAAAAAAAAAAA80 GOTO 10
This is the pinout for the serial port of the C64/C128. It is shownfacing the rear of the computer. Pinout is the same for CBM drives, butthen pins 3 and 6 are inputs. Serial cables are wired "straight through",that is, pin 1 to pin 1, pin 2 to pin 2, etc. 5 1 6 4 2 3PIN SIGNAL DIRECTION DESCRIPTION 1 /SRQ IN Enables fast serial, 128 mode only with 1571/81. 2 GND Logic ground. 3 ATN I/O Logic low = interrupt, then quiry for device #. 4 CLK I/O Clock - timing for slow serial data. 5 DATA I/O Data to/from computer/drive. 6 /RST OUT Logic low pulse from computer = reset periferals.