Lm/Sig Control Register; Table 1-19. Vme Registers - Motorola MVME2300 Series Programmer's Reference Manual

Board Description and Memory Maps
1
PCI I/O Address

LM/SIG Control Register

REG
BIT SD7
SET
FIELD
SIG1
OPER
RESET
1-38

Table 1-19. VME Registers

0000 1000 SIG/LM Control Register
0000 1001 SIG/LM Status Register
0000 1002 VMEbus Location Monitor Upper Base Address
0000 1003 VMEbus Location Monitor Lower Base Address
0000 1004 VMEbus Semaphore Register 1
0000 1005 VMEbus Semaphore Register 2
0000 1006 VMEbus Geographical Address Status
These registers are described in the following subsections.
The LM/SIG Control register is an 8-bit register located at ISA I/O address
x1000. This register provides a method to generate software interrupts.
The Universe ASIC is programmed so that this register can be accessed
from the VMEbus to generate software interrupts to the processor(s).
LM/SIG Control Register - Offset $1000
SD6 SD5
SET SET
SIG0 LM1
0 0 0
SET_SIG1
Writing a 1 to this bit will set the SIG1 status bit.
SET_SIG0
Writing a 1 to this bit will set the SIG0 status bit.
Function
SD4 SD3 SD2
SET CLR CLR
LM0 SIG1 SIG0
WRITE-ONLY
0 0 0
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SD1 SD0
CLR CLR
LM1 LM0
0 0