Motorola MVME172 用户手册
3-36
Computer Group Literature Center Web Site
MC2 Chip
3
V3
V3 set to a one indicates that the Ethernet interface is not
present. V3 set to a zero indicates that a Ethernet interface
is present.
present. V3 set to a zero indicates that a Ethernet interface
is present.
V4
V4 set to a one indicates that the MC68060 is present. V4
set to a zero indicates that an MC68LC060 is present.
set to a zero indicates that an MC68LC060 is present.
V5
Reserved for internal use only.
V6
V6 = 0 indicates the board is an MVME172FX model
(P2 I/O and 4 IndustryPack connector pairs).
V6 = 1 indicates the board is an MVME172LX model
(front panel I/O and 2 IndustryPack connector pairs).
(P2 I/O and 4 IndustryPack connector pairs).
V6 = 1 indicates the board is an MVME172LX model
(front panel I/O and 2 IndustryPack connector pairs).
V7
Reserved for internal use only.
SCSI Interrupt Control Register
IL2-IL0
Interrupt Level. These three bits select the interrupt level
for the SCSI processor. Level 0 does not generate an
interrupt.
for the SCSI processor. Level 0 does not generate an
interrupt.
IEN
Interrupt Enable. When this bit is set high, the interrupt is
enabled. The interrupt is disabled when this bit is low.
enabled. The interrupt is disabled when this bit is low.
INT
Interrupt Status. This status bit reflects the state of the INT
pin from the SCSI processor (qualified by the IEN bit).
When this bit is high, a SCSI processor interrupt is being
generated at the level programmed in IL2-IL0. This status
bit does not need to be cleared, because it is level
sensitive.
pin from the SCSI processor (qualified by the IEN bit).
When this bit is high, a SCSI processor interrupt is being
generated at the level programmed in IL2-IL0. This status
bit does not need to be cleared, because it is level
sensitive.
ADR/SIZ
$FFF4202C (8 bits)
BIT
7
6
5
4
3
2
1
0
NAME
INT
IEN
IL2
IL1
IL0
OPER
R
R
R
R/W
R
R/W
R/W
R/W
RESET
0
0
R
0 PL
0
0 PL
0 PL
0 PL