Honeywell 6000 Series Reference Manual page 32

READ CONTROL REGISTER
This instruction supplies seek complete, seek incomplete, or device operation statistic.:s
to the EUS, and can be addres8ed to any legal device. If the instruction is" addressed to the
control (device zero), two 36-bit words are transferred to the EUS. The "format
for each word, depending on the subsystem configuration, is shown in Figure Z-14.
WORDS 1
&
2
I:
31
1
32
H&a
3s
l}
BIT NUMBER
Single Channel
Noncrossbar
Configuration
DEVICE
NUMBER
32 33 36
10
15116
WORDS 1
&
2
35
I}
BIT NUMBER
Dual Channel
11
16117 361
Crossbar
DEVICE
MBZ
a
Configuration
NUMBER
a
Must be Zero
Figure Z-14. Read Control Register Format
For each device, by device number, word I provides seek complete information and
word 2 provides device available information by the combination of corresponding bits in
words I and 2:
V/ord I
o
o
Word 2
o
o
1
READ STATUS REGISTER
Device available; no information about seek t:omplete.
Device available; seek complete.
Device not available; busy positioning.
Device not available: seek incomplete, standby,
offline, or attention.
This instruction supplies the control status or the device status to the EUS.
RELEASE
This instruction releases a reserved device to the given logical channel.
Z-16 DB3?