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// Retro Vintage Connectors

Atari ST ACSI 19-Pin

ACSI (Atari Computer System Interface) is a SCSI-derived bus on the Atari ST using a DB19 connector for hard drives, CD-ROM drives, and the SLM804 laser printer from 1985 to 1994.

// Specifications
Standard
Atari ACSI proprietary
Pin Count
19
Speed
5 MB/s SCSI-1 derived
Status
Obsolete Atari ST era
Use Case
Atari ST STE Mega hard drives printers
Note
SCSI-1 compatible with adapter
// Pin Reference Table
Pin Name Function Type
1 D0 Data bit 0 I/O
2 D1 Data bit 1 I/O
3 D2 Data bit 2 I/O
4 D3 Data bit 3 I/O
5 D4 Data bit 4 I/O
6 D5 Data bit 5 I/O
7 D6 Data bit 6 I/O
8 D7 Data bit 7 I/O
9 /CS Chip select active low I/O
10 GND Ground GND
11 A1 Address bit 1 I/O
12 /IRQ Interrupt request I/O
13 /DRQ DMA request I/O
14 /DACK DMA acknowledge I/O
15 R/W Read write direction I/O
16 /RST Reset I/O
17 GND Ground GND
18 GND Ground GND
19 +5V 5V power PWR