# IEEE488

(at the Devices)

24 PIN CENTRONICS FEMALE at the Devices.

Also known as GPIB (General Purpose Interface Bus)

Pin | Name | Description | Source
--- | --- | --- | ---
1 | DIO1 | Data Bit 1 | Talker
2 | DIO2 | Data Bit 2 | Talker
3 | DIO3 | Data Bit 3 | Talker
4 | DIO4 | Data Bit 4 | Talker
5 | EOI | End Or Indentity | Talker/Controller
6 | DAV | Data Valid | Controller
7 | NRFD | Not Ready For Data | Listener
8 | NDAC | No Data Accepted | Listener
9 | IFC | Interface Clear | Controller
10 | SRQ | Service Request | Talker
11 | ATN | Attention | Controller
12 |  | Shield | -
13 | DIO5 | Data Bit 5 | Talker
14 | DIO6 | Data Bit 6 | Talker
15 | DIO7 | Data Bit 7 | Talker
16 | DIO8 | Data Bit 8 | Talker
17 | REN | Remote Enabled | Controller
18 |  | Ground DAV | -
19 |  | Ground NRFD | -
20 |  | Ground NDAC | -
21 |  | Ground IFC | -
22 |  | Ground SRQ | -
23 |  | Ground ATN | -
24 |  | Logical Ground | -

### Data Lines:

Name | Description
--- | ---
DIO1 to DIO8 | Data Input Output

### Handshake Lines:

Name | Description
--- | ---
DAV | Data Valid
NRFD | Not Ready For Data
NDAC | Not Data Accepted

### Interface Management Lines:

Name | Description
--- | ---
ATN | Attention
IFC | Interface Clear
REN | Remote Enable
SRQ | Service Request
EOI | End or Identify

Contributor: Joakim Ögren

Source:
Commodore PET FAQ

Copyright © The Hardware Book Team 1996-2001.
May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2001-06-07