The Museum of HP Calculators

Differential Equations 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 Math Pac 1. 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 "DFEQ67"
 02 LBL 10
 03 LBL A
 04 2
 05 /
 06 STO 20
 07 RTN
 08 LBL 11
 09 LBL B
 10 CF 01
 11 STO 22
 12 RDN
 13 STO 21
 14 RTN
 15 LBL 12
 16 LBL C
 17 SF 01
 18 STO 23
 19 RTN
 20 LBL 13
 21 LBL D
 22 FS? 01
 23 GTO 18
 24 LBL 09
 25 RCL 22
 26 RCL 21
 27 XEQ 14
 28 STO 24
 29 RCL 22
 30 +
 31 RCL 21
 32 RCL 20
 33 +
 34 XEQ 14
 35 STO 00
 36 RCL 22
 37 +
 38 RCL 21
 39 RCL 20
 40 +
 41 XEQ 14
 42 ST+ 00
 43 ENTER
 44 +
 45 RCL 22
 46 +
 47 RCL 21
 48 RCL 20
 49 ENTER
 50 +
 51 STO 23
 52 +
 53 XEQ 14
 54 RCL 24
 55 +
 56 RCL 00
 57 ENTER
 58 +
 59 +
 60 3
 61 /
 62 RCL 22
 63 +
 64 STO 22
 65 RCL 21
 66 RCL 23
 67 +
 68 STO 21
 69 XEQ 08
 70 RCL 22
 71 XEQ 08
 72 FS? 00
 73 ADV
 74 GTO 09
 75 LBL 18
 76 LBL d
 77 RCL 23
 78 RCL 22
 79 RCL 21
 80 XEQ 14
 81 STO 24
 82 STO 09
 83 RCL 20
 84 XEQ 15
 85 STO 00
 86 STO 09
 87 RCL 20
 88 RCL 09
 89 RCL 23
 90 +
 91 RCL 24
 92 XEQ 16
 93 ST+ 00
 94 ENTER
 95 +
 96 STO 09
 97 RCL 20
 98 ENTER
 99 +
100 XEQ 15
101 RCL 00
102 ENTER
103 +
104 +
105 RCL 24
106 +
107 3
108 /
109 RCL 23
110 +
111 STO 23
112 LASTX
113 RCL 00
114 RCL 24
115 +
116 3
117 /
118 +
119 RCL 20
120 ENTER
121 +
122 STO 24
123 *
124 RCL 22
125 +
126 STO 22
127 RCL 24
128 RCL 21
129 +
130 STO 21
131 XEQ 08
132 RCL 22
133 XEQ 08
134 FS? 00
135 ADV
136 GTO 18
137 LBL 15
138 LBL a
139 RCL 09
140 RCL 23
141 +
142 RCL 09
143 LBL 16
144 LBL b
145 2
146 /
147 RCL 23
148 +
149 R^
150 *
151 RCL 22
152 +
153 RCL 21
154 R^
155 +
156 LBL 14
157 LBL E
158 RCL 20
159 *
160 RTN
161 LBL 08
162 FS? 00
163 7PRTX
164 FS? 00
165 RTN
166 STOP
167 RTN
168 LBL 19
169 LBL e
170 FS? 00
171 GTO 00
172 SF 00
173 1
174 RTN
175 LBL 00
176 CF 00
177 0
178 RTN
179 STOP
180 END

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