FDS RAM adaptor cable pinout
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███████ ████████████████████████████████ ████████████████████████████████ ███ 1 3 5 7 9 B ███ ███ ███ ███ 2 4 6 8 A C ███ ████████████████████████████████ ████████████████████████████████ Open-end view of the RAM adaptor's disk drive connector. pin # *2C33 pin *RAM pins signal description ----- --------- --------- ------------------ 1 50 5 (green) (O) -write 2 64 C (cyan) (O) VCC (+5VDC) 3 49 6 (blue) (O) -scan media 4 32 1 (brown) (O) VEE (ground) 5 52 3 (orange) (O) write data 6 37 B (pink) (I) motor on/battery good 7 47 8 (grey) (I) -writable media 8 - - (I) motor power (note 1) 9 51 4 (yellow) (I) read data A 45 A (black) (I) -media set B 46 9 (white) (I) -ready C 48 7 (violet) (O) -stop motor notes on symbols ---------------- (O): Signal output. (I): Signal input. - : Indicates a signal which is active on a low (0) condition. * : These are corresponding pinouts for the 2C33 I/O chip, and the other end of the RAM adaptor cable, which both are located inside the RAM adaptor. 1 : The RAM adaptor does not use this signal (there is no wire in the cable to carry the signal). An electronically controlled 5-volt power supply inside the disk drive unit generates the power that appears here. This power is also shared with the drive's internal electric motor. Therefore, the motor only comes on when there is voltage on this pin.
