| Routines

16B0: THE 'SET-MIN' SUBROUTINE

Used by the routine at MAIN_EXEC. This subroutine resets the editing area and the areas after it to their minimum sizes. In effect it 'clears' the areas.
SET_MIN | 16B0 | LD HL,($5C59) | Fetch E-LINE.
| 16B3 | LD (HL),$0D | Make the editing area hold only the 'carriage return' character and the end marker, and set K-CUR accordingly
| 16B5 | LD ($5C5B),HL
| 16B8 | INC HL
| 16B9 | LD (HL),$80
| 16BB | INC HL | Reset WORKSP and move on to clear the work space.
| 16BC | LD ($5C61),HL
This entry point is used by the routines at STMT_LOOP and INPUT. Entering here will 'clear' the work space and the calculator stack.
SET_WORK | 16BF | LD HL,($5C61) | Fetch the start address of the work space WORKSP.
| 16C2 | LD ($5C63),HL | Clear the work space by setting STKBOT equal to WORKSP.
This entry point is used by the routines at ERROR_2 and E_LINE_NO. Entering here will 'clear' only the calculator stack.
SET_STK | 16C5 | LD HL,($5C63) | Fetch STKBOT.
| 16C8 | LD ($5C65),HL | Clear the stack by setting STKEND equal to STKBOT.
In all cases make MEM address the calculator's memory area.
| 16CB | PUSH HL | Save STKEND.
| 16CC | LD HL,$5C92 | The base of the memory area (MEMBOT).
| 16CF | LD ($5C68),HL | Set MEM to this address.
| 16D2 | POP HL | Restore STKEND to the HL register pair before returning.
| 16D3 | RET