
SCRIPTS Processor
2-5
Table 2.1
Parity Control
EVP
1
EPG
2
EPC
3
AESP
4
Description
0
0
0
0
Does not check for parity errors.
Parity flows from DP[3:0] through
the chip to the SCSI bus when sending SCSI data. Parity flows from
the SCSI bus to DP[3:0] when receiving SCSI data. Asserts odd
parity when sending SCSI data and host data.
0
0
0
1
Does not check for parity errors.
Parity flows from DP[3:0] through
the chip to the SCSI bus when sending SCSI data. Parity flows from
the SCSI bus to DP[3:0] when receiving SCSI data. Asserts even
parity when sending SCSI data, odd parity when sending host data.
0
0
1
0
Checks for odd parity on both SCSI data received and system
data when sending.
Parity flows from DP[3:0] through the chip to
the SCSI bus when sending SCSI data. Parity flows from the SCSI
bus to DP[3:0] when receiving SCSI data. Asserts odd parity when
sending SCSI data and host data.
0
0
1
1
Checks for odd parity on both SCSI data received and system
data when sending.
Parity flows from DP[3:0] through the chip to
the SCSI bus when sending SCSI data. Parity flows from the SCSI
bus to DP[3:0] when receiving SCSI data. Asserts even parity when
sending SCSI data, and odd parity when sending host data.
0
1
0
0
Does not check for parity errors.
Parity on DP[2:0] is ignored and
DP3 becomes ABORT/. Parity is generated when sending SCSI
data. Parity flows from the SCSI bus to the chip but is not asserted
on DP[3:0] when receiving SCSI data. Asserts odd parity when
sending SCSI data.
0
1
0
1
Does not check for parity errors.
Parity on DP[2:0] is ignored, and
DP3 becomes ABORT/. Parity is generated when sending SCSI
data. Parity flows from the SCSI bus to the chip, but is not asserted
on DP[3:0] when receiving SCSI data. Asserts even parity when
sending SCSI data.
0
1
1
0
Checks for odd parity on SCSI data received.
Parity on DP[2:0] is
ignored, and DP3 becomes ABORT/. Parity is generated when
sending SCSI data. Parity flows from the SCSI bus to the chip, but
is not asserted on DP[3:0] when receiving SCSI data. Asserts odd
parity when sending SCSI data.
0
1
1
1
Checks for odd parity on SCSI data received.
Parity on DP[2:0] is
ignored and DP3 becomes ABORT/. Parity is generated when
sending SCSI data. Parity flows from the SCSI bus to the chip, but
is not asserted on DP[3:0] when receiving SCSI data. Asserts even
parity when sending SCSI data.