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ACCESSED BY
EXTERNAL
DISPLAYABLE SWITCH
SWITCH
SET/RESET
MNEMONIC
DEFINITION
FACILITY
c
D
WORD ONLY
BA
BRANCH CONDITIONS
ALL MODES
EXT TO CPU
YES
--
7
BB
SOFT STOP BRANCH CONDITIONS
CPU MODE
EXT TO CPU
YES
CPU
F
BC
EXTERNAL FACILITY
ALL MODES
--
--
-
YES
CADR
COMM ADAPTER DIAGNOSTIC REG
COMM MODE
CPU TO EXT
--
--
-
CCTRL
START-STOP CONTROL
COMM MODE
--
--
-
YES
CHI
COUNTER 1 HIGH IN-DIAGNOSTIC
2311 MODE
EXT TO CPU
YES
2311
8
CLI
COUNTER 1 LOW IN-DIAGNOSTIC
2311 MODE
EXT TO CPU
YES
2311
9
CPF
READ DIRECT ENABLE
CPU MODE
--
--
-
YES
CSFTF
START STOP/SYNC
COMM MODE
--
--
-
YES
DAIN
DATA IN
COMM MODE
EXT TO CPU
YES
COMM
A
DAO UT
DATA OUT
COMM MODE
CPU TO EXT
--
--
-
DASI
DISK ATTACHMENT STATUS IN
2311 MODE
EXT TO CPU
YES
2311
5
DIAB
DIAGNOSTIC REG
2311 MODE
--
--
-
YES
DIAC
DIAGNOSTIC REG
2311 MODE
--
--
-
YES
DILIN
DIAL IN
COMM MODE
EXT TO CPU
YES
COMM
E
DI LOUT
DIAL OUT
COMM MODE
CPU TO EXT
--
--
-
DR
DIAGNOSTIC REGISTER
ALL MODES
YES
CPU
c
NOTE 1
OS
DISK STATUS
2311 MODE
EXT TO CPU
YES
2311
E
DYN
DYNAMIC CONDITION REGISTER
ALL MODES
YES
--
4
FBI
FILE BUS IN
2311 MODE
EXT TO CPU
YES
2311
1
FBO
FILE BUS OUT
2311 MODE
CPU TO EXT
--
--
-
FEBO
FILE 1400EMULATOR BUS OUT
2311 MODE
CPU TO EXT
--
--
-
FFI
Fl LE FLAGS IN
2311 MODE
EXT TO CPU
YES
2311
D
FFO
Fl LE FLAGS OUT
2311 MODE
CPU TO EXT
--
--
-
FGA
FILE GATED ATTENTION
2311 MODE
EXT TO CPU
YES
2311
c
FIA
FILE INFORMATION
2311 MODE
--
--
-
YES
FIB
FILE INFORMATION
2311 MODE
--
--
-
YES
FIC
Fl LE INFORMATION
2311 MODE
--
--
-
YES
FOB
Fl LE OUT BUS-DIAGNOSTIC
2311 MODE
EXT TO CPU
YES
2311
3
FOP
FILE OP REGISTER
2311 MODE
YES
2311
F
GA
CHANNEL SIGNALS
CHAN MODE
--
--
-
YES
GB
CHANNEL SIGNALS
CHAN MODE
--
--
-
YES
GB/IN
CHANNEL BUS IN
CHAN MODE
EXT TO CPU
YES
CHNL
F
GB/OUT
CHANNEL BUS OUT
CHAN MODE
CPU TO EXT
--
--
-
GC
CHANNEL SIGNALS
CHAN MODE
--
--
-
YES
GD
CHANNEL DIAGNOSTIC REGISTER
CHAN MODE
EXT TO CPU
YES
CHNL
E
GS
CHANNEL BRANCH CONDITIONS
CHAN MODE
EXT TO CPU
YES
CHNL
c
GSTAT
GENERAL STATUS
COMM MODE
EXT TO CPU
YES
COMM
F
GT
CHANNEL BRANCH CONDITIONS
CHAN MODE
EXT TO CPU
YES
CHNL
D
JA
DIRECT CONTROL-2 TIMING
CPU MODE
CPU TO EXT
--
--
-
JI
DIRECT CONTROL IN
CPU MODE
EXT TO CPU
YES
CPU
8
JO
DIRECT CONTROL-1
CPU MODE
CPU TO EXT
--
--
-
LACON
LINE ADAPTER CONDITIONS
COMM MODE
EXT TO CPU
YES
COMM
c
LADR
LINE ADAPTER DIAG REGISTER
COMM MODE
CPU TO EXT
--
--
-
LAIN
LINE ADDRESS IN
COMM MODE
EXT TO CPU
YES
COMM
B
LAO UT
LINE ADDRESS OUT
COMM MODE
CPU TO EXT
--
--
-
LAST AT
LINE ADAPTER STATUS
COMM MODE
EXT TO CPU
YES
COMM
D
MC
ERROR REGISTER
CPU MODE
EXT TO CPU
YES
CPU
E
MMSK
MICROPROGRAM MASK REGISTER
ALL MODES
YES (0- 7)
--
6
NOTE 2
MODE
MODE REG (LS AND EXT ADDR
NOTE 3
CTRL)
ALL MODES
--
--
-
MS
MODULE SELECT REGISTER
2311 MODE
CPU TO EXT
--
--
-
MW
MACH CHK. WAIT STATE LATCHES
CPU MODE
CPU TO EXT
--
--
-
p
PUNCH SIGNALS
2540 MODE
--
--
-
YES
PAR CK
COMMUNICATIONS PARITY CHECK
COMM MODE
CPU TO EXT
--
--
-
PCCL
PRINT CHAR COUNTER LENGTH
1403 MODE
CPU TO EXT
--
--
-
PO
PUNCH DATA OUT (READER)
2540 MODE
CPU TO EXT
--
--
-
PR
1403 PLBAR DATA OUT
1403 MODE
CPU TO EXT
--
--
-
PRA
PRINTER SIGNALS
1403 MODE
--
--
-
YES
Figure 1-47. External Mnemonics and Addressing (Part 1 of 2)
2025 FEMM (7/69) 1-65
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