Vmebus Slave Write Post And Snoop Control Register 1 - Motorola MVME1X7P Programmer's Reference Manual

VMEbus Slave Write Post and Snoop Control Register 1

ADR/SIZ
BIT
15
NAME
OPER
RESET
This register is the slave write post and snoop control register for the first
VMEbus-to-local-bus map decoder.
WP1
SNP1
SNP1
10
0
0
1
1
ADDER1
http://www.motorola.com/computer/literature
$FFF40010 (8 bits [4 used] of 32)
14 13 12
When this bit is high, write posting is enabled for the
address range defined by the first VMEbus slave map
decoder. When this bit is low, write posting is disabled for
the address range defined by the first VMEbus slave map
decoder.
These bits control the snoop enable lines to the local bus
for the address range defined by the first VMEbus slave
map decoder. The snooping functions differ according to
processor type, as shown:
Requested Snoop Operation
9 MC68040
0 Snoop disabled
1 Source dirty, sink byte/word/longword
0 Source dirty, invalidate line
1 Snoop disabled (Reserved)
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.
LCSR Programming Model
11 10 9
SNP1
ADDER
1
R/W R/W
0 PS 0 PS
MC68060
Snoop enabled
Snoop disabled
Snoop enabled
Snoop disabled
2
8
WP1
R/W
0 PS
2-35