# VESA LocalBus (VLB)

VLB=VESA Local Bus.
VESA=Video Electronics Standards Association.

(at the card)
(at the computer)

58 PIN EDGE CONNECTOR MALE at the card.
58 PIN EDGE CONNECTOR FEMALE at the computer.

Pin | Name | Description
--- | --- | ---
A1 | D1 | Data 1
A2 | D3 | Data 3
A3 | GND | Ground
A4 | D5 | Data 5
A5 | D7 | Data 7
A6 | D9 | Data 9
A7 | D11 | Data 11
A8 | D13 | Data 13
A9 | D15 | Data 15
A10 | GND | Ground
A11 | D17 | Data 17
A12 | Vcc | +5 VDC
A13 | D19 | Data 19
A14 | D21 | Data 21
A15 | D23 | Data 23
A16 | D25 | Data 25
A17 | GND | Ground
A18 | D27 | Data 27
A19 | D29 | Data 2
A20 | D31 | Data 31
A21 | A30 | Address 30
A22 | A28 | Address 28
A23 | A26 | Address 26
A24 | GND | Ground
A25 | A24 | Address 24
A26 | A22 | Address 22
A27 | VCC | +5 VDC
A28 | A20 | Address 20
A29 | A18 | Address 18
A30 | A16 | Address 16
A31 | A14 | Address 14
A32 | A12 | Address 12
A33 | A10 | Address 10
A34 | A8 | Address 8
A35 | GND | Ground
A36 | A6 | Address 6
A37 | A4 | Address 4
A38 | WBACK# | Write Back
A39 | BE0# | Byte Enable 0
A40 | VCC | +5 VDC
A41 | BE1# | Byte Enable 1
A42 | BE2# | Byte Enable 2
A43 | GND | Ground
A44 | BE3# | Byte Enable 3
A45 | ADS# | Address Strobe
A48 | LRDY# | Local Ready
A49 | LDEV | Local Device
A50 | LREQ | Local Request
A51 | GND | Ground
A52 | LGNT | Local Grant
A53 | VCC | +5 VDC
A54 | ID2 | Identification 2
A55 | ID3 | Identification 3
A56 | ID4 | Identification 4
A57 | LKEN# |
A58 | LEADS# | Local Enable Address Strobe
B1 | D0 | Data 0
B2 | D2 | Data 2
B3 | D4 | Data 4
B4 | D6 | Data 6
B5 | D8 | Data 8
B6 | GND | Ground
B7 | D10 | Data 10
B8 | D12 | Data 12
B9 | VCC | +5 VDC
B10 | D14 | Data 14
B11 | D16 | Data 16
B12 | D18 | Data 18
B13 | D20 | Data 20
B14 | GND | Ground
B15 | D22 | Data 22
B16 | D24 | Data 24
B17 | D26 | Data 26
B18 | D28 | Data 28
B19 | D30 | Data 30
B20 | VCC | +5 VDC
B21 | A31 | Address 31
B22 | GND | Ground
B23 | A29 | Address 29
B24 | A27 | Address 27
B25 | A25 | Address 25
B26 | A23 | Address 23
B27 | A21 | Address 21
B28 | A19 | Address 19
B29 | GND | Ground
B30 | A17 | Address 17
B31 | A15 | Address 15
B32 | VCC | +5 VDC
B33 | A13 | Address 13
B34 | A11 | Address 11
B35 | A9 | Address 9
B36 | A7 | Address 7
B37 | A5 | Address 5
B38 | GND | Ground
B39 | A3 | Address 3
B40 | A2 | Address 2
B41 | n/c | Not connected
B42 | RESET# | Reset
B43 | DC# | Data/Command
B44 | M/IO# | Memory/IO
B45 | W/R# | Write/Read
B48 | RDYRTN# | Ready Return
B49 | GND | Ground
B50 | IRQ9 | Interrupt 9
B51 | BRDY# | Burst Ready
B52 | BLAST# | Burst Last
B53 | ID0 | Identification 0
B54 | ID1 | Identification 1
B55 | GND | Ground
B56 | LCLK | Local Clock
B57 | VCC | +5 VDC
B58 | LBS16# | Local Bus Size 16

Contributor: Joakim Ögren

Source:¨ comp.sys.ibm.pc.hardware.* FAQ Part 4, maintained by Ralph Valentino

Copyright © The Hardware Book Team 1996-2001.
May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2001-06-08