IBM System/360 2050 Maintenance Manual page 117

s,o,
1 Abbreviation
Name
Digit 4-Q;glt S
Oigih 6,7,8,9
Comments
+00 HB
Holt and Branch Not used
Branch address
Next instruction from PR
6-9.
-00 HP Holt and Proc.e9d Not used Not used
Next instruction from IC.
+01
B Branch Not used
Branch address
Unconditional branch without halt;
next instruction from
PR 6-9.
-01 NOP No Operation Not used Not used
Not instruction from IC.
+02 BLX
Branch and Lood Location in Index Word
Incle• Word for storing IC
Branch address Contents
of
IC Cl"e stored in index
word, positions
2-5.
+03
CD Compare Storage to Digit Value compared
P01ition to be compared Address
of
data
Tums on high, low, or equal
indieator.
-03
Sign Control Sign value
Operation: CompCl'e opsations turn on high,
CSA
Compare Sign to Alpha
3,6, or 9 0. Compare Addreu
of
data for operations
low, or equal indicator:
CSM Compare Sign to Minus
1. Molce
0-1
CSP Compare Sign to Plus
2. Sign change sense
Not used for operations 2 and 3
Highost
+9999999999
MSA Make Sign Alpha
3. Sign chonge stop
-+0000000000
MSM
Make Sign Min"'
4. Sign change test
Branch address for opwation 4
-0000000000
MSP Make Sign Plus
-9999999999
@9999999999
SMSC Operation 2
Lowest
@0000000000
HMSC Operation 3
BSC
Operation 4
+08
-OB
Unemulated
+09 Operations
-09
+10 BZI Branch if Zero in Accumulator 1 Not used
Branch address
Sign is ignored.
-10 BMl Brcrich if Minus in Accumulator 1 Not
used Bronc h address
Contents are ignored.
+11 BVl Branch if Overflow in Accumulator 1 Not used Branch oddr9n
IF overflow indicator is on, brmch
and turn
it off.
-11 ZSTl Zero 5toroge
and
Store Accumulator 1 Field definition
Adch11 of data
•12
sn
$tore Accumu lotor 1
Field definition
Address of data
-12 STDl Store Digits From Accumulator 1 and Field definition
Addre11 of data
Ignore Sign
+13 ZAl Zero Accumulator 1 and Add Field definition
Addre11 of data
-13 ZSl Zero Accumulator 1 and Subtract Field definition
Addreu
of
data
+14 Al Add to Accumulator 1 Field definition
Addre•
of
doto
-14 Sl Subtract from Accumulator 1 Field definition
Addreu
of data
+15 Cl Compare Accumulator 1 to Storage
Field definition
Addreu of doto Sets high, low, or equal indicator,
-15 CA Compare Abtolute in Accumulator 1 to
Field definition
Address of data Sets high, IOW", or equal indicator.
Abiolute in Storage
+16 ZAA
Zero Accumulator 1 and Acid Absolute
Field definition
Address of data
-16 Z5A Zero Accumulator 1 and Subtract Abiolute Field definition
Addr••
of doto
+17 AA Add Absolute to Accumulator 1 Field definition
Address
of
data
-17 SA Subtract Absolute from Accumulator 1 Field definition
Addr..,
of data
+18 ASl Add to Storage
r-
Accumulator 1
Field definition
Addre11 of data
-18 SSI Subtract Accumulator 1 from Storage
Field definition
Addre11
of data
+19 AASl Add to Absolute Storage from Accumulator
Field definition
Addrou
of data
1
+20 BZ2 Branch if Zero in Accumulator 2
Not used
Branch oddr.,
Sign is ignored.
-20 BM2 Branch if Minus in Accumulator 2 Not
used Branch oddrou
Contents are ignored.
+21 BV2 Branch if Overflow in Accumulator 2 Not used
8rC"a"tch addr•s
If overflow indicator is on, branch
and 1 ... n If off.
-21 ZST2
Zero Storage and Store Accumulator 2 Field definition
Address of data
+22 ST2 Store Accumulator 2
Field definiticn Addro11
of data
+23 ZA2 Zero Accumulator 2 and Add
Field definition Addroa of data
-23 ZS2 Zero Accumulator 2 and Subtract
Field definition
Addre11 of data
+24 A2 Add to Accumulator 2
Field definition
Addreu of data
-24 S2
Subtract from Accumulator 2 Field definition
Acldr.,. of data
+25
C2 Compare Accumulator 2 to Storage Field definition
Acidreu
of
doto
Sets high, low, or equal indicator,
+28 AS2 Add to Storage from Accumul otor 2
Field definition Addr""
of
data
-28 SS2 Subtract Accumulator 2 from Storage
Field definition
Addrea of data
+29 AAS2
Add to Abooluto Storage Field definition
Addr . . . . . . . .
+30 BZ3
Branch if Zero ln Accumulator 3 Not IMd
Branch oddr . . Sign is Ignored.
-30
BM3
Branch if Minus in Accumulator 3 Not
used Branch oddr•1 Contents ore ie-od.
+31 BV3 Branch if Overflow in Accumul- 3 Not
used Branch oddr..,
If overflow indicator is on, branch
and
tum
It off.
-31 ZST3
Zero Storage and Store Accumulator 3 .Field dofiniHon
Addr.,.
of data
+32 ST3 Store Accu01UI- 3
Field definition Addr . .
of
data
-32 STD3 Store Digits from Accumulator 3
and Fleld cWinition
Addroa of data
Ignore Sign
FIGURE 111. EMULATED 7070;74 OPERATION CODES (PART 1 OF•)
116 (3/71) Model 50. FEMM