In TI-84 assembly, you use the BCALL
or B_CALL
instruction to do a "system call" into the TI-84's ROM. This is usually used for simple I/O things (B_CALL PutS
prints a string to the screen), but it could also be for more complicated mathematical routines (LD A,OPNormal; B_CALL BinOPExec
computes the normalcdf(
function).
Google "ti-84 bcall BinOPExec" for more information on B_CALL
.