Model 466-1 Adapter
48 CSR Accessed From The SBus
BI
T
FUNCTION
7
Interface Parity Error
6
Remote Bus Error
5
Received Parity Error
4
reserved
3
reserved
2
Interface Timeout
1
reserved
0
Remote Power Off or I/O Cable Is Off
INTERFACE PARITY ERROR (bit 7): This bit is set to "1" when an
interface parity error occurs on a chassis-to-chassis transfer. Bit 7 is an OR'ed
parity bit; consequently, the parity could have occurred during transmission
across the cable to the VMEbus adapter card or while receiving data from the
VMEbus adapter card. It is reset to "0" when the
Clear Errors
bit is set to "1"
in the Local Command Register.
REMOTE BUS ERROR (bit 6): If a VMEbus bus error (BERR signal) occurs
on a SBus to VMEbus transfer, bit 6 is set to "1". The most common cause of
a VMEbus error is a VMEbus timeout asserted when a data transfer cycle did
not properly terminate before the system timeout interval. It is reset to "0"
when the
Clear Errors
bit is set to "1" in the Local Command Register.
RECEIVED PARITY ERROR (bit 5): If an interface parity error occurs on a
VMEbus to SBus transfer, this bit is set to "1". Bit 5 indicates the exact
direction of the transfer that is failing because of parity errors. It is reset to
"0" when the
Clear Errors
bit is set to "1" in the Local Command Register.
INTERFACE TIMEOUT (bit 2): If the VMEbus does not respond within 720
SBus clock cycles to a command from the SBus, an interface timeout occurs
and bit 2 is set to "1". It is reset to "0" when the
Clear Errors
bit is set to "1"
in the Local Command Register.
REMOTE BUS POWER OFF or I/O CABLE IS OFF (bit 0): Bit 0 is set to
"1" if the VMEbus chassis power is off or if the I/O cable is not connected. It
will also be "1" when SYSRESET is active on the VMEbus; attempts to
communicate with remote resources will fail and result in interface errors. Bit
0 does not generate an interrupt; it is detected only by polling.
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...