IBM System/370 145 Reference Summary page 126

Ill
EXTERNAL ADDRESS LINE DECODING
Gate P-Reg Oest
Gate C1 X-Dest
Ext Dest Dec Bit
X - Lines
Gate C2 Y-Dest
C-Reg By 2 C-Reg By 2 C-Reg By 2
Gate C1 Y-Dest
C-Reg By 1 C-Reg By 1 C-Reg By 1
567
Y- Lmes
EXTERNAL GATING TO A-REGISTER
Expanded External
Gate
External Assembler
Assembler
Word
Word
Addr
Addr
Gate Ext OB Switches A-H
CPC Asm
Group A'
09 CF-DATA-REGISTER
Gate Ext
00 MB2,MB3.ECNT,
26
IF A (word 26)
RCNT
Group,B' 02 DIAGO,DIAG1,
36 TODHO,TODH1,
FEAT2,FEAT3 TODH2,TODH3
OA ACBO,ACB1 3E TODLO.TODL 1.
TODL2.TODL3
Gate Ext
18 ABRTY0,ABRTY1, IE
PIR (Spare)
ABRTY2,ABRTY3
Group,C' 19 SRTY ,PRTY ,TRTY, IF
PIRM (Spare)
LRTY
IA
HRTY ,MRTY2,MRTY 3
IB
BYTDST, RTYFLG,
LSDST,EYDST
Not
20-23 IFA or SX1 10
EPSWA,EPSWB,
MSKA,MSKB
Gate Ext
30-33 SX2
11
CTCAXO,CTCAX1,
CTCAX2,CTCAX3
Group ABC' 06 MCKB
12
EXTINT.EC,SER1
07
MCKA
13
CTCAYO,CTCAY1,
CYCAY2,CYCAY3
OE
MTO,MTl,MBl,MBO 08
MODE,CFDAR.
LRUM,MATCH
OF Tl,TA,TT,TE
17
DCBO,DCHl,TSBO,DCBI
05
SYSO,SYS1 ,SYS2,
H-REG
16
INTA INTB SER2 SER3
11.2