The Museum of HP Calculators

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

Go back to the HP-41 software library
Go back to the general software library
Go back to the main exhibit hall