Internal SCSI Port (50-Pin Header)
All odd pins are grounds, except for pin 25, which is unused.
Pin 2: *Data 0
Pin 4: *Data 1
Pin 6: *Data 2
Pin 8: *Data 3
Pin 10: *Data 4
Pin 12: *Data 5
Pin 14: *Data 6
Pin 16: *Data 7
Pin 18: *Parity
Pin 20: Ground
Pin 22: Ground
Pin 24: Ground
Pin 26: Terminator Power
Pin 28: Ground
Pin 30: Ground
Pin 32: *ATN
Pin 34: Ground (Unused?)
Pin 36: *BSY
Pin 38: *ACK
Pin 40: *RST
Pin 42: *MSG
Pin 44: *SEL
Pin 46: *C/D
Pin 48: *REQ
Pin 50: *I/O