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Routines |
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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.
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| 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 | |||
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This entry point is used by the routines at STMT_LOOP and INPUT.
Entering here will 'clear' the work space and the calculator stack.
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| 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. | ||
| SET_STK | 16C5 | LD HL,($5C63) | Fetch STKBOT. | |
| 16C8 | LD ($5C65),HL | Clear the stack by setting STKEND equal to STKBOT. | ||
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In all cases make MEM address the calculator's memory area.
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| 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 | |||
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