Motorola MVME1X7P - Manual (Page 125)

LCSR Programming Model
http://www.motorola.com/computer/literature 2-35
2
VMEbus Slave Write Post and Snoop Control Register 1
This register is the slave write post and snoop control register for the first
VMEbus-to-local-bus map decoder.
WP1 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.
SNP1 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:
ADDER1 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.
ADR/SIZ $FFF40010 (8 bits [4 used] of 32)
BIT 15 14 13 12 11 10 9 8
NAME ADDER
1
SNP1 WP1
OPER R/W R/W R/W
RESET 0 PS 0 PS 0 PS
SNP1 Requested Snoop Operation
10 9 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