Would you make the program have some hook then and call at some function on the homescreen (like symbolic)? That would be epic!

That would be hard for a basic program to install hooks

Great program anyway
I have a request though. Instead of doing "operand 1", "operand 2", "operation", couldn't it just input the calculation then look for an operation sign and guess alone what the operation is and what are the operands ?

Well in ugly basic (it's been a while since I last programmed with that ) it can be done like that:

ClrHome
Input Str1
For(A,1,length(Str1))
If sub(Str1,A,1)="+"
Then
sub(Str1,1,A-1)->Str2
sub(Str1,A+1,length(Str1)-A)->Str3
End
End
Disp Str2
Disp Str3
Pause

Of course, this code only supports "+" but "*" and "-" can easily be added
Here is a screenshot below to show what that code produces
The problem I see with "+" is that there are a lot of "+" already in the two operands so the program could not see the difference between those and the operator one
But anyway, that would be great for * and /

Guys I think I am done with the TI-Basic version. There will be no further updates, beyond bug-fixes. My goal is to get an assembly version up and running, and to phase out the TI-Basic version.

On the assembly version:

- It will indeed be hook activated!
- It will support polynomial addition, subtraction, multiplication, and division, as well as integrals and derivates. It will also support solving equations with multiple variables in terms of any one variable. It will also support solving systems of equations for all variables, and solving equations with a single variable for that variable.
- In effect, my goal is to create a symbol interpreter for the TI-83+/84+.

I know this is a massive undertaking, and I don't have all the time in the world, so any assembly programmers with spare time who want to jump in on some stuff and help that would be great.

In a way. What features does Symbolic have?

Yeah. I'm thinking 16.8 Fixed Point.

Anyway, this project is being made universal. If you are a Z80 assembly programmer with some spare time, hop over to the link below (Google Docs), check out what is needed and write a routine or two, post it into the google doc, then add your name or screen name to the very bottom of the document, along with what routines you should be credited for. I'll be working on it regularly myself as well, time providing.

Also, I seem to have lost my resources on the appropriate headers for a TI Application file, so someone can edit that in to the Doc as well.

When it is done, we can publish this as a community project, rather than a project done by a single author. That allows us to make it a large, feature-dynamic project, very quickly. This will be cross posted to cemetech as well.

Link to Google Doc:
https://docs.google.com/document/d/1R5MgUPEO1muFVD_8rArb5MsTiMA5M7KATDqquwZ3wKE/edit

For a better description, head over to http://www.cemetech.net/forum/viewtopic.php?p=196685#196685

Well, my hope is to not need to use tokens at all. If you use the proper invocation string at the beginning of the input, it is automatic.

So, have you made any more progress on this awesome project?