Model 466-1 Adapter
CSR Accessed From The SBus 55
In Page Mode, the Page Register contents may have to be swapped
between Dual Port RAM and Remote RAM access. If, however, the page
window size is larger than the Dual Port RAM size, the Page Register is
ignored for Dual Port RAM accesses.
IACK READ MODE ADDRESS A3-A1 (bits 2-0): These bits indicate the
interrupt level (1 - 7) being acknowledged when performing an IACK Read
function. See section 1.8.
6.2.3 Remote Status Register
The Remote Status Register is a read-only register located on the VMEbus
adapter card. It is accessed from the SBus adapter card in Node I/O space
with address 020 0009
hex
. Access is byte only.
BIT
FUNCTION
7
VMEbus Was Reset
6
IACK Read Mode Address Bit 1
5
PR Interrupt Flip-Flop Is Set (on VMEbus card)
4
Lock Bus Not Set (the
inverted
state of the Lock Bus flip-flop)
3
Use Address Page Register
2
IACK Read Mode Address Bit 2
1
PT Interrupt Flip-Flop Is Set (on VMEbus card)
0
IACK Read Mode Address Bit 0
VMEbus WAS RESET (bit 7): Set to "1" when SYSRESET occurs; cleared
when "0" is written to Remote Command Register 1 bit 7.
IACK READ MODE ADDRESS BIT 1 (bit 6): Shows the state of the
IACK
Read Mode Address Bit 1
written to the Remote Command Register 1. This
bit and bits 2 and 0 are non-contiguous to maintain compatibility with
previous SBS adapter models.
PR INTERRUPT FLIP-FLOP IS SET (bit 5): Bit 5 is "1" when the PR
Interrupt flip-flop on the VMEbus adapter card is set.
LOCK BUS NOT SET (bit 4): Shows the
inverted
state of the Lock Bus
flip-flop controlled by bit 4 of Remote Command Register 1.
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...