Vmebus Slave Address Modifier Select Register 1 - Motorola MVME1X7P Programmer's Reference Manual

VMEchip2

VMEbus Slave Address Modifier Select Register 1

2
ADR/SIZ
BIT
NAME
OPER
RESET
2-36
7 6
SUP USR A32
R/W R/W R/W
0 PSL 0 PSL 0 PSL
This register is the address modifier select register for the first VMEbus-
to-local-bus map decoder. There are three groups of address modifier
select bits: DAT, PGM, BLK and D64; A24 and A32; and USR and SUP.
At least one bit must be set from each group to enable the first map
decoder.
DAT When this bit is high, the first map decoder responds to
VMEbus data access cycles. When this bit is low, the first
map decoder does not responded to VMEbus data access
cycles.
PGM When this bit is high, the first map decoder responds to
VMEbus program access cycles. When this bit is low, the
first map decoder does not respond to VMEbus program
access cycles.
BLK When this bit is high, the first map decoder responds to
VMEbus block access cycles. When this bit is low, the
first map decoder does not respond to VMEbus block
access cycles.
D64 When this bit is high, the first map decoder responds to
VMEbus D64 block access cycles. When this bit is low,
the first map decoder does not respond to VMEbus D64
block access cycles.
A24 When this bit is high, the first map decoder responds to
VMEbus A24 (standard) access cycles. When this bit is
low, the first map decoder does not respond to VMEbus
A24 access cycles.
$FFF40010 (8 bits of 32)
5 4 3
A24 D64
R/W R/W
0 PSL 0 PSL
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2 1 0
BLK PGM DAT
R/W R/W R/W
0 PSL 0 PSL 0 PSL