LZ-Adv: Re: ZShell Adv.
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>>Can I call TI-Basic programs from within a ZShell program?
>>How about the other way around?
>
>No, but if you want to write a ti-basic parser, more power to you!
What is a parser, and what would it do?
Oh, yeah... I forgot. How can I call one ZShell program from another?
>>How does the CUSTOM menu work?
>
>Exactly how, I can't remember, but when you it to a command that you use
>often, the ti-os writes into memory, a special place for the custom
menu, an >asm command esentially exectues a the key press as if you had
searched through
>the menus to find the command. This is how ZShell works, a backup of
calc
>ram was hex-edited to point to the zshell string. When you press F1,
>instead of displaying it on the screen, the mem pointed to by the menu,
>which is ZShell tells it to do other wise. In this way, I guess you
could
>hexedit it to point to your program, but to copy your program, people
would
>have to do a backup, whick kind of defeates the purpose of zshell. At
>ti-calc.org, there is a file called 'tihack.txt' which explains it all
in
>detail.
So when I hit a menu key, the OS calls a function that displays the name
of the function onto the home screen?
>>Why doesn't the ZShell program move around in memory, like all the
other
>>programs?
>
>I didn't know that the other programs did...
>From the ZSHELL.DOC file :
2) The calculator dynamically rearranges its memory, so there is never an
sure way to pinpoint the location of a program in order to access data
and do JUMPs and CALLs. One way to circumvent this problem is to recall
a picture variable into the graphics memory (8641).
Thanx for the feedback!
Jason "Thursday" Wenger
jwenger@juno.com
Illegitimi no carborundum
References: