Retro Vintage Connectors 19 pins

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.

// connector diagram 19 pins

// loading diagram...

// Specifications

Standard

Atari ACSI proprietary

Pin Count

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

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.