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5444 FILE SENSE
Op
QCode
Operand 1
Code
DA
M
N
0
78
11 12 13
15 16
30
Operand 1
=
2 bytes Direct addressing
l
Byte 1 =Operand 1 address
70
Operand 1
=
1 byte Indexed by XR-1
I
Byte 2
=
Operand 1 address-1
BO
Operand 1
=
1 byte Indexed by XR-2
1010
Device address disk drive 1 (A)
1011
Device address disk drive 2 (B)
0
Removable disk
1
Fixed disk
Low Core Address
H!.g_h Core Address
Byte 2 (EB2)
Bytel (EB1)
II
000
Invalid
001
Invalid
010
0 No-op
0 Scan equal hit
1 lnvervention required
1 Cylinder zero
2 Missing address
2 End of cylinder
marker
3 Equipment check
3 Seek busy
4
Data check
4 100 cylinder
5 No record found
5
Overrun
6 Track condition
6
Reserved
check
7 Seek check
7 Disk drive 2 sel
011
0 Unsafe
0 Reserved
1 TAP line A
1 Jumperable CE bit
2 TAP line B
2 Jumperable CE bit
3 TAP line C
3 Not bit ring inhibit
4 Index
4 Standard write trigger
5 Head settling
5 Condition priority request
6 Jumperable CE bit
6 Bit ring 0
7 Reserved
7 Not CC
r~
position 17
100
DFDR
101
Invalid
110
DFGR
111
Invalid
xx xx
xx xx
Operand address (sense bytes destination)
Figure 1-12. 5444 File Sense Bytes
5410 FEMM
(1/71)
1-15
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