Motorola MVME172 manual WP1, SNP1, ADDER1

Models: MVME172

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LCSR Programming Model

VMEbus Slave Write Post and Snoop Control Register 1

ADR/SIZ

 

 

$FFF40010 (8 bits [4 used] of 32)

 

 

 

 

 

 

 

 

 

 

 

BIT

15

14

13

12

11

10

 

9

8

 

 

 

 

 

 

 

 

 

 

NAME

 

 

 

 

ADDER1

 

SNP1

WP1

 

 

 

 

 

 

 

 

 

OPER

 

 

 

 

R/W

 

R/W

R/W

 

 

 

 

 

 

 

 

 

RESET

 

 

 

 

0 PS

 

0 PS

0 PS

 

 

 

 

 

 

 

 

 

 

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 are:

 

0

Snoop enabled

 

1

Snoop inhibited

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.

2

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Page 113
Image 113
Motorola MVME172 manual WP1, SNP1, ADDER1