Motorola MVME147 Installation And Use Manual page 109

Programming the GCSR
There are eight GCSR registers as shown in Table 4-10. The
VMEbus address is in the supervisor short I/O map.
Table 4-10. VMEchip Global Control and Status Register
MVME147 VMEbus
Address Address
FFFE2021 00x1
FFFE2023 00x3
FFFE2025 00x5
FFFE2027 00x7
FFFE2029 00x9
FFFE202B 00xB
FFFE202D 00xD
FFFE202F 00xF
Note The x denotes the value in the GCSR base address configuration register bits 0-3.
Note
Bit 7 Bit 6 Bit 5
LM3 LM2 LM1
R&H SCON ISF
BRDID7 BRDID6 BRDID5 BRDID4
General Purpose Control and Status Register 0
General Purpose Control and Status Register 1
General Purpose Control and Status Register 2
General Purpose Control and Status Register 3
General Purpose Control and Status Register 4
The bottom two lines in the table for each of the
following GCSR register definitions defines the
operations possible on the register bits, from the
MC68030 and the VMEbus, as follows:
R This bit is a read-only status bit.
R/W This bit is readable and writable.
C Writing a 1 to this bit clears it. This bit reads 0.
R/C This bit is readable. Writing a 1 to this bit clears it.
This bit is readable. Writing a 1 to this bit sets it; it
R/S
cannot be cleared.
Programming the VMEchip
Register
Bit 4 Bit 3 Bit 2
LM0 CHIPID3 CHIPID2 CHIPID1 CHIPID0 Global 0
BRDFAIL
BRDID3 BRDID2
Name
Bit 1 Bit 0
SIGHP SIGLP Global 1
BRDID1 BRDID0 Board ID
4-59
4