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HP-41 Math Pac Part Numbers and such



#2

A friend noticed my Math Pacs had different HP Part Numbers. I Have all four versions. I assume there are minor software differences, but I have not taken the time to verify. The first line is how they CATalog 2 on an HP-41. The second line is the white-ink HP Part Number on the module. The last line is the date code stamped into the module case.



MATH 1A

HP 00041-15003

Date Code 1953



MATH 1B

HP 00041-14023

Date Code 2134



MATH 1C

HP 5061-5261

Date Code 8535



-MATH 1D

HP 5061-7287

Date Code 8939



Interesting notes:



MATH 1B does not show up in a CAT 2 on a 41CX Machine, the other three do. Why?



-MATH 1D is part of the MATH/STAT Module and also has -STAT 1B included in the module.



The date code on the MATH 1A, 1953, would mean 1979 Week 53. Dec 31 1979 was a Monday. Was it made on that Monday only?


#3

My MATH modules:

MATH 1A
HP 00041-14002
Date Code 2038

MATH 1B
HP 00041-14023
Date Code 2202

MATH 1C
HP 5061-5261
Date Code 8416

-MATH 1D
HP 5061-7287
Date Code 8939

MCode listing of each ROM has different version and may be the function "Math 1B" isn't adressed in the FAT. Could be an explanation for the the fact that "Math 1b" doesn't show up on a 41CX. To be continued...


#4

I remember that my HP math module had a bug in the code and an addendum on a card said to copy the program in ram and to change a line of code .... I remember that it was a line with a flag test to change with the flag test and reset flag command ..... FC? with FC?C or FS? with FS?C

My math module is :

MATH 1A
HP 00041-14002
Made in Singapore
Date code 2057

New versions may have fixed this minor bug !!!!!

Nabuchodonosor, King of Babylone..... and HP user.


#5

Hello all,

Well, I found this famous addendum (I notice that nobody is interested by this .....).

This one explains that you have to change the line #160 of the FOUR program (program for the Fourrier's serials) from :

160 FS? 02

to :

160 FS?C 02

May it be possible for all people having such a module to verify the content of the 160th line of the FOUR program on their MATH module ?

Of course, if you have not something more important to do.

By the way, is this addendum a vintage for collectors ?

Nabuchodonosor, King of Babylone..... and proudly HP user.


#6

Hello,

I am not a user of the FOUR program, but ...
I have a MATH/STAT (ref. 5061-7287, year 1985, date code 8728) for which the line 160 of the program FOUR reads RCL00 !
In fact the context is the following :

.
.
157 *
158 PI
159 *
160 RCL 00
161 *
162 RCL 25
163 /
164 1
165 FS?C 02 (finally !??)
166 XEQ 08
167 P-R
168 RCL IND 21
.
.

It seems the program has been altered more than once by HP people !

Bruno


#7

Next step is to dump all the programs of this @#$£) module.

It's a good job for Nabuchon..... ..... ... .

Signed :

Nabuchodonosor, King of Babylone..... and proudly HP user.

#8

Unless I remember wrong, the CX only shows entries that
are 7 letters or more in CAT 2. The assumption is that
these "functions" are the module name, since you cannot
execute them.


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