| Routines

14298: THE 'TAN' FUNCTION (offset 33)

The address of this routine is found in the table of addresses. It is called indirectly via fp_calc_2. This subroutine handles the function TAN X. It simply returns SIN X/COS X, with arithmetic overflow if COS X=0.
tan | 14298 | RST 40 | X
| 14299 | DEFB 49 | duplicate: X, X
| 14300 | DEFB 31 | sin: X, SIN X
| 14301 | DEFB 1 | exchange: SIN X, X
| 14302 | DEFB 32 | cos: SIN X, COS X
| 14303 | DEFB 5 | division: SIN X/COS X=TAN X (report arithmetic overflow if needed)
| 14304 | DEFB 56 | end_calc: TAN X
| 14305 | RET | Finished: 'last value'=TAN X.