Alternative HP-41CL mainframe (OS ROMs) update for beta test

[hth]

(10-08-2019 08:51 AM)Ángel Martin Wrote:  Sorry but I'm not sure I follow you - are these options for the [MASK] patch?
If so, it simply replaces the current code (no need for additional room), and it works for both full-nuts and half-nuts.
Therefore I see no need for two different builds.

I'd leave the starburst chars alone in Full-nuts, that's a hardware limitation.

I am under the impression that it is the MASK routine that introduces the starburst characters when there is no suitable alternative:

Code:


MASK20:       cxisa                 ; load 1 char from table
              ?a#c    x             ; match a special char ?
              gonc    MASK30        ; yes
              c=c+1   pt            ; point to next word
              gonc    MASK20        ; go on !
              ldi     0x3a          ; all segment if not found
              goto    MASKRT

I tried to change it as suggested on my 41CL, but it does work so well. The existing lower case characters (a-e) stop working in alpha register and all lower case characters are replaced by a space.