Motorola MVME1X7P User Manual
2-32
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VMEchip2
2
VMEbus Slave Write Post and Snoop Control Register 2
This register is the slave write post and snoop control register for the
second VMEbus-to-local-bus map decoder.
second VMEbus-to-local-bus map decoder.
WP2
When this bit is high, write posting is enabled for the
address range defined by the second VMEbus slave map
decoder. When this bit is low, write posting is disabled for
the address range defined by the second VMEbus slave
map decoder.
address range defined by the second VMEbus slave map
decoder. When this bit is low, write posting is disabled for
the address range defined by the second VMEbus slave
map decoder.
SNP2
These bits control the snoop enable lines to the local bus
for the address range defined by the second VMEbus
slave map decoder. The snooping functions differ
according to processor type, as shown:
for the address range defined by the second VMEbus
slave map decoder. The snooping functions differ
according to processor type, as shown:
ADDER2
When this bit is high, the adder is used for address
translation. When this bit is low, the adder is not used for
address translation.
translation. When this bit is low, the adder is not used for
address translation.
ADR/SIZ
$FFF40010 (8 bits [4 used] of 32)
BIT
31
30
29
28
27
26
25
24
NAME
ADDER
2
SNP2
WP2
OPER
R/W
R/W
R/W
RESET
0 PS
0 PS
0 PS
SNP2
Requested Snoop Operation
26
25
MC68040
MC68060
0
0
Snoop disabled
Snoop enabled
0
1
Source dirty, sink byte/word/longword
Snoop disabled
1
0
Source dirty, invalidate line
Snoop enabled
1
1
Snoop disabled (Reserved)
Snoop disabled