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19 pin D-SUB male connector layout
19 pin D-SUB male connector
Used to connect Laser printers or Harddrives
Pin Name Description
1D0Data 0
2D1Data 1
3D2Data 2
4D3Data 3
5D4Data 4
6D5Data 5
7D6Data 6
8D7Data 7
9/CSChip Select
10IRQInterrupt Request
16A1Address bit
19REQData Request

The Atari uses this port to connect external Hard Disk following a specification call ASCI close to SCSI with a DB19M-DB19M cable. Connections in cable are straight 1-1 to 19-19 wires (not sure).

19 pin D-SUB female connector layout
19 pin D-SUB female connector
According to 3 reports in our database (3 positive and 0 negative) the Atari ACSI DMA pinout should be correct.

Is this pinout
Source(s) of this and additional information: Hardware Book, Lawrence Wright, Steve & Sally Blair
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