Texas Instruments TI-92+, Tip List

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Characters with these codes are all converted to "?", which is char(63):
1, 3 - 9, 11, 14-17, 19 - 21, 23 - 27, 127, 167, 170, 174, 182, 198, 208, 222
Also:
char(12) is changed to char(126)
char(166) is changed to char(124)
char(184) is changed to char(183)
char(247) is changed to char(47)
And note that:
!
char(2) can be copied as a string, but will locate the cursor when pasted.
!
char(10) pastes as the line feed symbol in TI Basic programs on the calculator, but pastes as an
actual line feed in GraphLink.
!
char(13) pastes as the carriage return symbol in TI Basic programs on the calculator, but pastes
as an actual carriage return in GraphLink.
For the character codes, refer to the table TI-89 / TI-92 Plus Character Codes in Appendix B of the
TI-89/TI-92+ Guidebook.
You can create a special character by using char(code) at the entry line, where code is the numeric
code for the character. For example, to create the filled-square character:
1. Enter char(16) in the entry line and press [ENTER]. The character string is placed in the first
answer level of the history display.
2. Press [UP] to select the character string.
3. Press [COPY] to copy the string. [COPY] is [DIAMOND] [C] on the TI-92+, and [DIAMOND]
[SHIFT] on the TI-89.
4. The special character string is now in the clipboard, and can be pasted where needed, for
example, in a program or function in the program editor.
The solution to the character-conversion problem is to avoid the procedure above, and instead use the
char() function to create any special characters which are needed in your programs. If you do use the
procedure, then you should at least warn the user not to open the program files in GraphLink before
sending them to the calculator.
I used this process to determine which characters are changed by GraphLink:
1. Create a string of characters to test at the entry line. For example, char(3)&char(4)&char(5)
creates a string of three characters. Save the string to a variable called l1.
2. Receive l1 from the calculator from the calculator with GraphLink. Open l1 in GraphLink and
copy the string to the clipboard.
3. Open a new program file in GraphLink called tstr(), and paste the string. tstr() saves the pasted
string to variable l2, as shown below.
4. Send tstr() to the calculator with GraphLink and run it, to save the string to variable l2.
5. Use the strcompr() function shown below to compare the original string l1 to the (possibly)
modified string l2, and return the differences, if any.
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