[A83] Re: TI-83 Symbols
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[A83] Re: TI-83 Symbols
At 02:41 PM 2/25/02 -0500, you wrote:
>Does anyone know the romcall to create a symbol? I'm looking for the call
>that does the same thing as _createprog only it creates a symbol not a
>program. I am working on creating a program similar to attrib only for the
>83. The only features I am working on are a protect/unprotect scheme (I have
>this working) and a hiding scheme. I have several ideas for hiding, the
>first being the basic change the first character to an unprinting char. The
>problem with that is I want it to be completely user-friendly (doesn't
>require a user input 1st char to unhide). I could also use different
>nonprinting chars as ID numbers (that reference the actual 1st char) but
>then the program is limited by the number of nonprinting chars. My most
>recent idea would be to copy the entire program into a symbol to hide, then
>copy it back to unhide. I just don't know how practical speed and memory
>wise this would be. I would appreciate any help. Thanks in advance.
>
>Brian
For hiding, you add an extra character to the front that is unprinting
(shift the others down . . .) and change the sizebytes appropriately. The
last char can be lost, but noone really cares, I don't think.
References: