The Museum of HP Calculators

Curve Fitting for the HP-41C/CV/CX

This program is Copyright © HP and is used here by permission. It was originally printed in the HP-67 Standard Pac. This program was ported to the HP-41C by reading with the HP-41C card reader and the card reader may be required for operation of this program. This program was entered and uploaded by Tony Duell.

This program is supplied without representation or warranty of any kind. Tony Duell, Hewlett Packard 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.

Documentation Information (CD or source code)
How to get this Program to your Calculator (via HP-IL, disk, wand, and fingers)
Download Binary (.raw) program for disk or PC HP-IL Card download
Download Hexadecimal (.dat) program for Serial Port download

Program Listing

LINE  KEYS
 01 LBL "CFIT67"
 02 LBL 15
 03 LBL a
 04 0
 05 FS?C 02
 06 RTN
 07 1
 08 SF 02
 09 RTN
 10 LBL 16
 11 LBL b
 12 CF 00
 13 CF 01
 14 7P<>S
 15 7CLREG
 16 7P<>S
 17 1
 18 RTN
 19 LBL 17
 20 LBL c
 21 XEQ 16
 22 SF 01
 23 RTN
 24 LBL 18
 25 LBL d
 26 XEQ 16
 27 SF 00
 28 RTN
 29 LBL 19
 30 LBL e
 31 XEQ 18
 32 SF 01
 33 RTN
 34 LBL 10
 35 LBL A
 36 CF 22
 37 LBL 08
 38 FS?C 02
 39 XEQ 09
 40 STO 23
 41 FS? 01
 42 LN
 43 X<>Y
 44 STO 22
 45 FS? 00
 46 LN
 47 FS?C 22
 48 GTO 00
 49 SREG 14
 50 S+
 51 LBL 07
 52 ENTER
 53 1
 54 +
 55 RCL 22
 56 X<>Y
 57 RCL 23
 58 X<>Y
 59 RTN
 60 LBL 00
 61 SREG 14
 62 S-
 63 GTO 07
 64 LBL 09
 65 ADV
 66 X<>Y
 67 7PRTX
 68 X<>Y
 69 7PRTX
 70 SF 02
 71 RTN
 72 LBL 11
 73 LBL B
 74 SF 22
 75 FS?C 02
 76 XEQ 03
 77 GTO 08
 78 LBL 12
 79 LBL C
 80 7P<>S
 81 ADV
 82 RCL 08
 83 RCL 04
 84 RCL 06
 85 *
 86 RCL 09
 87 /
 88 -
 89 ENTER
 90 ENTER
 91 RCL 04
 92 X^2
 93 RCL 09
 94 /
 95 RCL 05
 96 X<>Y
 97 -
 98 /
 99 STO 21
100 *
101 RCL 06
102 X^2
103 RCL 09
104 /
105 CHS
106 RCL 07
107 +
108 /
109 7PRTX
110 RCL 06
111 RCL 04
112 RCL 21
113 *
114 -
115 RCL 09
116 /
117 FS? 01
118 E^X
119 STO 20
120 7PRTX
121 RCL 21
122 7PRTX
123 7P<>S
124 RTN
125 LBL 14
126 LBL E
127 STO 24
128 RCL 20
129 RCL 21
130 RCL 24
131 FS? 01
132 GTO 01
133 FS? 00
134 LN
135 *
136 +
137 FS?C 02
138 GTO 09
139 RTN
140 LBL 01
141 FS? 00
142 GTO 02
143 *
144 E^X
145 *
146 FS?C 02
147 GTO 09
148 RTN
149 LBL 02
150 X<>Y
151 Y^X
152 *
153 FS?C 02
154 GTO 09
155 RTN
156 LBL 03
157 ADV
158 1-
159 7PRTX
160 SF 02
161 RDN
162 RTN
163 LBL 13
164 LBL D
165 STO 24
166 RCL 21
167 1/X
168 RCL 20
169 RCL 24
170 X<>Y
171 FS? 01
172 GTO 01
173 -
174 *
175 FS? 00
176 E^X
177 FS?C 02
178 GTO 09
179 RTN
180 LBL 01
181 /
182 FS? 00
183 GTO 01
184 LN
185 *
186 FS?C 02
187 GTO 09
188 RTN
189 LBL 01
190 X<>Y
191 Y^X
192 FS?C 02
193 GTO 09
194 RTN
195 STOP
196 END

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