Vmebus Slave Gcsr Board Address Register - Motorola MVME172 Programmer's Reference Manual

VMEchip2

VMEbus Slave GCSR Board Address Register

2
ADR/SIZ
BIT
NAME
OPER
RESET
2-48
23 . . .
GCSR Board Address
R/W
$F PS
This register defines the board address of the GCSR as viewed from the
VMEbus. The GCSR address is defined by the group address and the board
address. Once enabled, the GCSR register should not be reprogrammed
unless the VMEchip2 is VMEbus master. The value $F in the GCSR board
address register disables the map decoder. The map decoder is enabled
when the board address is not $F.
GCSR Board These bits define the board number portion of the GCSR
address. These bits are compared with VMEbus address
lines A4 through A7. The GCSR is enabled by values $0
through $E. The address $XXFY in the VMEbus A16
space is reserved for the location monitors LM0 through
LM3. Note: XX is the group address and Y is the location
monitor (1,LM0; 3,LM1; 5,LM2; 7,LM3).
$FFF4002C (4 bits of 32)
20
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