Unknwown ROMs for HP-41

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HP Forum Archive 14

Unknwown ROMs for HP-41
Message #1 Posted by Emmanuel, France on 25 Sept 2004, 10:03 a.m.

I got two 4K ROMs for HP-41: C 1983TRINH (XROM 9) NEWROM LOADP LOADPV RVER? PVIEW BLKCAT CODE DECODE and SIMPLEX ROM (XROM 31) 'GO 'IN 'LP 'PRREG 'LINXYP 'CPM 'CV+ 'TF If I understand the purpose of the first ROM, is there any documentation for both? Thanks.


Addendum to 'Unknwown ROMs for HP-41'
Message #2 Posted by Emmanuel, France on 26 Sept 2004, 9:18 a.m.,
in response to message #1 by Emmanuel, France

I programmed C 1983 TRINH and SIMPLEX ROM into a Clonix41 and tested it.
C 1983 TRINH ------------
NEWROM initializes a RAM page y= XROM # X= Page # ALPHA= ROM Name
LOADP loads a program from memory to a RAM page after a GTO.. LOADPV does the same and 'privates' this program X= Page # ALPHA= Program Name
RVER? returns page n status After ROM n, gives ROM n INTACT or ROM n BROKEN
PVIEW shows the remaining registers in program memory (?!)
BLKCAT follown by page # gives the ROM catalog
CODE cf. Zenrom, ...
DECODE cf. Zenrom, ...
Any idea about ROM name? C for copyright, 1983 for year 1983 and TRINH, a Thai name?
SIMPLEX ROM -----------
Some functions require another ROM with XROM 20 and a (sub)routine named B EERST. This ROM seems to have been made for stat' studying with columns printing.
To be continued ... -------------------
In order to contact me, please remove spam from my email.

Edited: 26 Sept 2004, 11:55 a.m.

Re: Addendum to 'Unknwown ROMs for HP-41'
Message #3 Posted by Ronald on 26 Sept 2004, 3:55 p.m.,
in response to message #2 by Emmanuel, France

In respect to the Simplex rom, I think to remember that PVIEW is the same function as VIEW, but then progammable. Try to put the registernumber in the X-register and then execute in a programe the PVIEW function.


Re: Addendum to 'Unknwown ROMs for HP-41'
Message #4 Posted by Emmanuel, France on 27 Sept 2004, 12:15 p.m.,
in response to message #3 by Ronald

Dear Ronald, I put pi into register # 99. When 99 XEQ 'PVIEW', 00 REG 46 .END. REG 46 00 REG 46 and so on (?!) Anyway thanks.

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