HP 75 Cat?

[J-F Garnier]

(03-07-2017 11:35 PM)rprosperi Wrote:  

(03-07-2017 09:10 PM)HP-Collection Wrote:  I have some CMT EPROMS for the HP 75 I do not know the content. Is there a command to show a sort of catalog like the CAT2 command on the HP-41?

There is no built-in command, however the HELP LEX file will produce a list of all keywords in the machine, which includes built-in OS commands, LEX files and ROMs.

This will give information on the LEX files included in the EPROM module, but many custom application modules are made mainly of Basic programs.

The built-in CAT command can't access the content of modules, but the PODPMS1C LEX (on the chhu01.dat image) extents the CAT to ROM ports.

Matthias, the following may look too complex for what you need (it's not actually), but I will document anyway as it may interest other HP75 owners.

Procedure (using the PIL-Box and ILPer):
Use the chhu01.dat file as HDRIVE2 image file.
Plug the EPROM module to be scanned in the left port of the HP75.
On the HP75, first assign the IO identifiers. With ILPer, there will be four, assign them to P1, M1, M2 and I1:
>assign io
Device # 1='1' (sorry for the smiley, don't know how to disable it but it's ":p1"
Device # 2=':m1'
Device # 3=':m2'
Device # 4=':i1'
then declare the display is device (not mandatory, but it makes the process easier to follow on ILPer):
>display is ":p1"

The following is a capture of the ILPer window, showing the commands applied to one of my CMT EPROM module:

Load the PODPMS1C LEX:
>copy "podpms1c:m2" to "podpms1c"
>cat all
Name Type Len Time Date
PODPMS1C L 2552 00:36 04/07/85
workfile B 0 00:00 01/01/00

Now, do cat ":rome", ":romf", "romg" to ":romh" to explore the 4 8KB banks of the EPROM moduile. Some maybe empty ("bank not initialized"). Press the down arrow to go through each catalog.
>cat ":rome"
ERROR: bank not initialized
>
>cat ":romf"
ERROR: bank not initialized
>
>cat ":romg"
Name Type Len Time Date
RUNL PL 150 00:53 01/01/00
LCROM1 B 7570 22:20 04/19/86
>
>cat ":romh"
Name Type Len Time Date
LCROM2 B 8102 19:08 04/15/86
>
In this particular CMT module, only two banks are used. There is a small LEX providing a support function, and two 8KB Basic programs. It's actually a software to manage video tape rental. Not a big interest.

Now, if you want, you can make ROM images of each bank and save them on HDRIVE1:

>copy "all:romg" to "rom1g"
>copy "all:romh" to "rom1h"
>cat all
Name Type Len Time Date
ROM1H R 8160 00:09 01/01/00
ROM1G R 7761 00:09 01/01/00
PODPMS1C L 2552 00:36 04/07/85
workfile B 0 00:00 01/01/00
>
>copy "rom1g" to "rom1g:m1"
>copy "rom1h" to "rom1h:m1"


J-F