| Routines

08980: THE 'STK-TO-A' SUBROUTINE

Used by the routine at STK_TO_BC. This subroutine loads the A register with the floating point number held at the top of the calculator stack. The number must be in the range 0 to 255.
Output
A | Number from the calculator stack
C | Sign of the number (1 or 255)
STK_TO_A | 08980 | CALL FP_TO_A | Modulus of rounded last value to A if possible; else, report error.
| 08983 | JP C,REPORT_B_3
| 08986 | LD C,1 | One to C for positive last value.
| 08988 | RET Z | Return if value was positive.
| 08989 | LD C,255 | Else change C to 255 (i.e. minus one).
| 08991 | RET | Finished.