2

VMEchip2

VMEbus Slave GCSR Board Address Register

ADR/SIZ

 

 

 

$FFF4002C (4 bits of 32)

 

 

 

 

 

 

 

 

 

BIT

23

 

. . .

 

20

 

 

 

 

 

 

 

 

 

 

 

 

 

NAME

 

GCSR Board Address

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPER

 

 

R/W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RESET

 

 

$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 that XX is the group address and Y is the location monitor (1,LM0; 3,LM1; 5,LM2; 7,LM3).

2-48

Computer Group Literature Center Web Site

Page 138
Image 138
Motorola MVME1X7P manual VMEbus Slave Gcsr Board Address Register