Model 466-1 Adapter
62 CSR Accessed From The VMEbus
7.1.1 VMEbus Command Register
The VMEbus Command Register is a byte-wide, read/write register located on
the VMEbus adapter card. It is accessed from VMEbus short I/O space at
address I/O LO + 1
hex
.
BIT
FUNCTION
7
Clear Status Register Errors
6
Clear PR Interrupt Flip-Flop On The VMEbus Adapter Card
5
Set PT Interrupt Flip-Flop on the VMEbus Adapter Card
4
Disable Interrupts
3
reserved - must be "0"
2
Disable Sending Interrupts To The SBus Adapter Card
1
reserved - must be "0"
0
reserved - must be "0"
CLEAR STATUS REGISTER ERRORS (bit 7): Communication errors are
indicated by the Local Node Status Register. Error bits in the Local Node
Status Register stay set until cleared by writing "1" to bit 7. This bit, however,
will automatically clear and will not be set when the Local Node Command
Register is read.
CLEAR PR INTERRUPT FLIP-FLOP (bit 6): Writing "1" to this bit clears
the PR Interrupt flip-flop on the VMEbus adapter card.
SET PT INTERRUPT FLIP-FLOP (bit 5): Writing "1" to bit 5 sets the PT
Interrupt flip-flop on the VMEbus adapter card. Writing "0" clears this
interrupt.
DISABLE INTERRUPTS (bit 4): Writing a "1" to bit 4 prevents the adapter
card from passing all interrupts through to the VMEbus.
DISABLE SENDING INTERRUPTS TO THE SBus ADAPTER CARD (bit
2): Writing a "1" to bit 2 prevents VMEbus interrupts from going across the
cable to the SBus adapter card.
Содержание 466-1
Страница 1: ...Model 466 1 Adapter Hardware Manual Connects a SBus Computer to a VMEbus System...
Страница 2: ...Model 466 1 Adapter ii...
Страница 24: ...Model 466 1 Adapter 14 Adapter Functions...
Страница 52: ...Model 466 1 Adapter 42 VMEbus Adapter Card Configuration...
Страница 70: ...Model 466 1 Adapter 60 CSR Accessed From The SBus...
Страница 88: ...Model 466 1 Adapter 78 Common Problems And Solutions...
Страница 106: ...Model 466 1 Adapter 96 Jumper Configuration Worksheets...
Страница 107: ...Model 466 1 Adapter Jumper Configuration Worksheets 97 D 1 SBus Adapter Card Worksheet J1...
Страница 108: ...Model 466 1 Adapter 98 Jumper Configuration Worksheets...
Страница 110: ...Model 466 1 Adapter 100 Jumper Configuration Worksheets...