IBM 1620 Manual page 83

The.(fixed) subroutines are located in memory from
address
00408
to
08300.
The object program groups
are variable in number and extend from
08300
up.
Object program length depends on the complexity of
the problem being calculated. The following are the
fixed subroutine names, their abbreviations, the num-
ber of factors required by each subroutine and the
address of the first instruction in each subroutine:
FORMAT FORTRAN
No. of
Factors Address of
Subroutine Name Abbreviation Required 1st Instruction
Floating Subtract FSB
2
00408
Floating Add
FAD
2 00518
Load into Floating Accumulator TOFAC
1 01238
Store from Floating Accumulator
FMFAC
1
01306
Floating Multiply
FMP
2 01378
Reverse Floating Divide FDVR
2 01756
F.loating Divide
FDV
2 01862
Reverse Sign
RSGN
1
02546
Fixed Add
FXA
2 02644
Fixed Subtract FXS
2 02700
Fixed Multiply
FXM
2 02748
Reverse Fixed Divide FXDR
2
02816
Fixe9 Divide FXD
2 02876
Convert Fixed Point to Floating
Point
FLOAT
1 03222
Floating A to the +B Power FAXB
2
03270
Convert Floating Point to Fixed
Point FIX
1 03494
A to the -I Power
FAXIN
2 03622
A to the +1 Power
FAXI
2
03670
Floating A to the -B Power FAXBN
2 04232
Read Card RACD
1 04512
Read Typewriter RATY
1 04548
Read Tape
RAPT
1 04596
Write Card WACO
1 04748
Write Typewriter
WATY
1
04796
Write Tape WAPT
1
04844
Figure
5
7.7