Chapter 4 AMIBIOS POST
76
Step 10 Install Adapter Cards,
Continued
VL-Bus
The first two expansion slots on the Enterprise-III EISA Local Bus motherboard are used for VL-Bus adapter cards. These
VL-Bus
bus mastering
slots are labeled
Local Bus1 (VL-BUS SLOT-7)
and
Local Bus2 (VL-BUS SLOT-8).
These
slots use the standard EISA/ISA sockets and an inline 64-pin extension connector to accomodate VL-Bus-compatible
adapter cards. Side A of the VL-Bus connector is the component side. Side B is the solder side. The pinout for the
VL-Bus connector follows:
Pin Use
Pin
Use
A1
DAT01
B1
DAT00
A2
DAT03
B2
DAT02
A3
GND B3
DAT04
A4
DAT05
B4
DAT06
A5
DAT07
B5
DAT08
A6
DAT09
B6
GND
A7
DAT11
B7
DAT10
A8
DAT13
B8
DAT12
A9
DAT15
B9
VCC
A10
GND
B10
DAT14
A11
DAT17
B11
DAT16
A12
VCC B12
DAT18
A13
DAT19
B13
DAT20
A14
DAT21
B14
GND
A15
DAT23
B15
DAT22
A16
DAT25
B16
DAT24
A17
GND B17
DAT26
A18
DAT27
B18
DAT28
A19
DAT29
B19
DAT30
A20
DAT31
B20
VCC
A21
ADR30
B21
ADR31
A22
ADR28
B22
GND
A23
ADR26
B23
ADR29
A24
GND B24
ADR27
A25
ADR24
B25
ADR25