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Ext§rnal Field Definitions, 2540 Punch Mode
(EX'l: t.9 CPU)
0000
0001
Unass-igned
Unassigned
Storage Protect O
MDM 4-41
0010
0
STPO
~it
1
S'IPO bit
2
STPO bit
3
STPO bit
4
STPO bit
5
STPO bit
6
STPQ bit
7
STPO bit
Storage Protect 1
MDM 4-41
0011
0
STP1 bit
1
S'IP1 bit
2
STP1 bit
3
STP1 bit
4
STP1 bit
5
STP1 bit
6
STP1 bit
7
STP1 bit
(STPO)
0 (QO)
1 (Ql)
2 (Q2)
3 (Q3)
4 (Q4)
5 (QS)
6 (Q6)
7 (Q7)
(STP1)
0
1
2
3
4
5
6
7
Dynamic Ccndition Register (DYN)
MOM
4-40
X=O
Storage wrap latch
OVFL Coverf low>
Adder cari:y
0100• 0
1
2
3
4
5
6
7
Not hold in (Dir Ctl feat)
Check disable switch
DYN
Reg l:it 6 ( HZQ=O)
dyn Reg bit 7 (LZ=O)
Status Register (S)
MDM 4-16
0101• 0
so
True/Comp! latch
1
Sl Z=ncnzero Call arith
2
S2 Z=nonzero
Clog,
dee.
3
S3
ALU
0-bit carry
ops>
&
bin
4
S4 Invalid decimal digit
5
SS (general purpose)
6
S6 Not execute
7
S7
Not
exceptional condition
1-50 ( 7
/69)
ops)
MMSK Register, Bi ts 0- 7 ( MMSK)
MDM 4-15
0110* 0
1
2
3
4
5
6
7
MMSKO Channel high trap
MMSKl 2311 disk control trap
MMSK2 Channel lcw trap
MMSK3 2540 reader trap
MMSK4 2540 punch trap
MMSKS Comm chnl bit service
MMSK6 Comm chnl char service
MMSK7 Level 1 priority hold
Branch Conditions (BA)
ll.DM 4-40
0111* 0
Chnl 0 interruption latch
1
Mode bit 0
2
Mode bit 1
3
Mode bit 2
4
IPL latch
5
LS zone bit 0
6
LS zone bit 1
7
LS zone bit 2
Diagnostic
R/P
Conditions 1 (RPD1)
MDM 4-43
1000
0
R/P tens AR A
1
R/P tens AR B
2
R/P tens AR C
3
R/P tens AR D
4
R/P tens AR
E
5
Punch address check
6
Punch overrun latch
7
Punch sync check latch
Diagnostic
R/P
Conditions 2 CRPD2)
MDM 4-43
1001
0
R/P units
AR
A
1
R/P units AR B
2
R/P units
AR
c
3
R/P units
AR
D
4
R/P units AR
E
5
Reader address check
6
Reader overrun latch
7
Reader sync check latch
Reader/Punch Data
In
2 (RP2)
MOM 4-110
1010
0
Col
1
RD2 punch check, data
1
Col 2 RD2 punch check, data
2
Col
3
RD2 punch check, data
3
Col 4 RD2 punch check, data
4
Col
5
RD2 punch check, data
5
Col 6 RD2 punch check, data
6
col 7 RD2 punch check, data
7
Col 8 RD2 punch check, data
in
in
in
in
in
in
in
in
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