Read Control Register; Read Status Register; Release - Honeywell 6000 Series Reference Manual

R EA 1') CONTROL R EGIST ER
This instruction supplies seek complete, seek incomplete, or device operation statistics
to the EUS, and can be addressed to any legal device. If the instruction isaddressed to the
for each word, depending on the subsystem configuration, is shown in Figure 2-14.
WORDS l 8 2
BIT NUMBER 0 31 32 35
MBza
DEVICE
NUMBER 1 32 33 36
WORDS 1 & 2
BIT NUMBER 0 15 16 35
DEVICE MBZa
NUMBER
1
16 17
36
3
Must be Zero
Figure 2-14. Read Control Register Format
Single Channel
Noncrossbar
Configuration
Dual Channel"
Crossbar
Configuration
For each device, by device number, word 1 provides seek complete information and
word 2 provides device available information by the combination of corresponding bits in
words I and 2:
Word 1
0
1
0
1
offline, or attention.
READ STATUS REGISTER
Word 2
0 Device available; no information about seek complete.
0 Device available; seek complete.
1 Device not available; busy positioning.
1 Device not available: seek incomplete, standby,
RELEASE
This instruction releases a reserved device to the given logical channel.
2-16 DB3?