2

VMEchip2

Local Bus Slave (VMEbus Master) Attribute Register 3

ADR/SIZ

 

 

 

$FFF40028 (8 bits of 32)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIT

23

22

 

21

20

19

 

18

17

 

16

 

 

 

 

 

 

 

 

 

 

 

 

NAME

D16

WP

 

 

 

 

AM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPER

R/W

R/W

 

 

 

 

R/W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RESET

0 PS

0 PS

 

 

 

 

O PS

 

 

 

 

 

 

 

 

 

 

 

 

 

This register is the attribute register for the third local-bus-to-VMEbus bus

 

map decoder.

 

 

 

 

 

 

 

 

 

 

AM

 

These bits define the VMEbus address modifier codes that

 

 

 

the VMEbus master uses for the segment defined by map

 

 

 

decoder 3. Because the local-bus-to-VMEbus interface

 

 

 

does not support block transfers, the block transfer

 

 

 

 

address modifier codes should not be used.

 

 

WP

 

When this bit is high, write posting is enabled to the

 

 

 

segment defined by map decoder 3. When this bit is low,

 

 

 

write posting is disabled to the segment defined by map

 

 

 

decoder 3.

 

 

 

 

 

 

 

 

D16

 

When this bit is high, D16 data transfers are performed to

 

 

 

the segment defined by map decoder 3. When this bit is

 

 

 

low, D32 data transfers are performed to the segment

 

 

 

defined by map decoder 3.

 

 

 

 

 

2-44

Computer Group Literature Center Web Site

Page 134
Image 134
Motorola MVME1X7P Decoder 3. Because the local-bus-to-VMEbus interface, Segment defined by map decoder 3. When this bit is