Lm/Sig Control Register; Table 1-17. Vme Registers - Motorola MVME2400 Series Programmer's Reference Manual

Board Description and Memory Maps
1
PCI I/O Address
0000 1000
0000 1001
0000 1002
0000 1003
0000 1004
0000 1005
0000 1006
These registers are described in the following sub-sections.

LM/SIG Control Register

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 II ASIC is programmed so that this register can
be accessed from the VMEbus to generate software interrupts to the
processor(s).
REG
BIT SD7
FIELD SET
SIG1
OPER WRITE-ONLY
RESET 0
1-28
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Table 1-17. VME Registers

Function
LM/SIG Control Register
LM/SIG Status Register
VMEbus Location Monitor Upper Base Address
VMEbus Location Monitor Lower Base Address
VMEbus Semaphore Register 1
VMEbus Semaphore Register 2
VMEbus Geographical Address Status
LM/SIG Control Register - Offset $1000
SD6 SD5 SD4
SET SET SET
SIG0 LM1 LM0
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.
SD3 SD2 SD1
CLR CLR CLR
SIG1 SIG0 LM1
0 0 0
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SD0
CLR
LM0
0