Motorola MVME2300 Series 사용자 설명서
1-42
Computer Group Literature Center Web Site
Board Description and Memory Maps
1
Semaphore Register 1
Semaphore Register 1 is an 8-bit register located at ISA I/O address x1004.
The Universe ASIC is programmed so that this register can be accessible
from the VMEbus. This register can only be updated if bit 7 is low or if the
new value has the most significant bit cleared. When bit 7 is high, this
register will not latch in the new value if the new value has the most
significant bit set.
The Universe ASIC is programmed so that this register can be accessible
from the VMEbus. This register can only be updated if bit 7 is low or if the
new value has the most significant bit cleared. When bit 7 is high, this
register will not latch in the new value if the new value has the most
significant bit set.
Semaphore Register 2
Semaphore Register 2 is an 8-bit register located at ISA I/O address x1005.
The Universe ASIC is programmed so that this register can be accessible
from the VMEbus. This register can only be updated if bit 7 is low or if the
new value has the most significant bit cleared. When bit 7 is high, this
register will not latch in the new value if the new value has the most
significant bit set.
The Universe ASIC is programmed so that this register can be accessible
from the VMEbus. This register can only be updated if bit 7 is low or if the
new value has the most significant bit cleared. When bit 7 is high, this
register will not latch in the new value if the new value has the most
significant bit set.
REG
Semaphore Register 1 - Offset $1004
BIT
SD7
SD6
SD5
SD4
SD3
SD2
SD1
SD0
FIELD
SEM1
OPER
R/W
RESET
0
0
0
0
0
0
0
0
REG
Semaphore Register 2 - Offset $1005
BIT
SD7
SD6
SD5
SD4
SD3
SD2
SD1
SD0
FIELD
SEM2
OPER
R/W
RESET
0
0
0
0
0
0
0
0