Fargo II

I am working on Ti Mario World for the Fargo II Shell and I need some help !!!

I almost have a complete version in TiBasic but it is too slow !!!

How can I do something like the following in Fargo II ?

"ABCDEF"->string

For i,1,dim(string)

mid(string,i,1)->register1

#("b"&string(ord(register1))->register2

goto putchar

endfor

putchar:

....

(this will use register2,but not register1)