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Atari ACSI DMA

19 PIN D-SUB ?? at the Computer.

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19 PIN D-SUB ?? at the Devices.

Pin Name Description
1 D0 Data 0
2 D1 Data 1
3 D2 Data 2
4 D3 Data 3
5 D4 Data 4
6 D5 Data 5
7 D6 Data 6
8 D7 Data 7
9 /CS Chip Select
10 IRQ Interrupt Request
11 GND Ground
12 /RST Reset
13 GND Ground
14 ACK Acknowledge
15 GND Ground
16 A1 Address 1
17 GND Ground
18 R/W Read/Write
19 REQ Data Request

Notes:

  • Pin 16: This signal tells the device’s DMA controller whether the device address is set on bus with all commands (A1=Low) or whether parameter bytes are handled (usually 5 parameter bytes;A1= high).

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