Local Bus Slave (Vmebus Master) Attribute Register 4 - Motorola MVME172 Programmer's Reference Manual

Local Bus Slave (VMEbus Master) Attribute Register 4

ADR/SIZ
BIT 31
NAME
D16
OPER
R/W
RESET
0 PS
This register is the attribute register for the fourth local bus to VMEbus bus
map decoder.
AM
WP
D16
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$FFF40028 (8 bits of 32)
30 29 28
WP
R/W
0 PS
These bits define the VMEbus address modifier codes the
VMEbus master uses for the segment defined by map
decoder 4. Because the local bus to VMEbus interface
does not support block transfers, the block transfer
address modifier codes should not be used.
When this bit is high, write posting is enabled to the
segment defined by map decoder 4. When this bit is low,
write posting is disabled to the segment defined by map
decoder 4.
When this bit is high, D16 data transfers are performed to
the segment defined by map decoder 4. When this bit is
low, D32 data transfers are per- formed to the segment
defined by map decoder 4.
LCSR Programming Model
27 26 25
AM
R/W
0 PS
2
24
2-43