The Museum of HP Calculators


IBM to/from Floating Point for the HP-16C

This program is by Neil Redmond and is used here by permission.

This program is supplied without representation or warranty of any kind. Neil Redmond and The Museum of HP Calculators therefore assume no responsibility and shall have no liability, consequential or otherwise, of any kind arising from the use of this program material or any part thereof.

Overview

It has been a long time since I wrote these routines so can't say why I used certain techniques. I did attempt to make a few minor changes to the routines in the HP-16C manual but ended up with new programs. The sample data has been taken from IBM COBOL manuals.

I hope the routines will be useful to some one, possibly from the Hercules390 DOS or VM groups.

Listing

IBM to FP

g LBL A
g CF 4
HEX
f SET COMPL 2's
2
0
f WSIZE
f RL
f RR
1
F
F MASKR
F AND
ENTER
ENTER
1
8
f MASKR
f AND
f XOR
g x!=0
g LSTx
g x!=0
GTO 1
ENTER
GTO 2
g LBL 1
g F? 4
CHS
x<->y
8
f RLn
4
6
-
4
x
g LBL 2
f FLOAT 9
g RTN

IBM to FP

g LBL B
f SET COMPL 2's
HEX
g CF 1
g CF 4
g x=y
g RTN
x<->y
g x<0
g SF 1
g ABS
2
0
f WSIZE
GSB 6
x<>y
1
2
0
+
ENTER
x<>y
3
f AND
g x=0
GTO 4
4
x<>y
-
x<>y
R down
f RRn
GSB 6
g R up
4
g LBL 4
+
g ASR
g ASR
g x<0
GTO 5
+
7
f RRn
g CF 4
g F? 1
g SF 4
g RRC
g RTN
g LBL 5
0
g RTN
g LBL 6
1
8
f MASKL
f AND
g RTN

Sample data

IBM		FP
44A45B40	42075.25
4430AF40	12463.25
43AB4800	 2740.5
C2FB0000	 -251.0
C35CC120	-1484.07+

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