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48
Task/Integer-sequence/Z80-Assembly/integer-sequence-1.z80
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48
Task/Integer-sequence/Z80-Assembly/integer-sequence-1.z80
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@ -0,0 +1,48 @@
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org &1000
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PrintChar equ &BB5A
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ld hl,1 ;START AT ONE
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main:
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push hl
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;PRINT HIGH BYTE
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ld a,h
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call ShowHex
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;THEN PRINT LOW BYTE
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ld a,l
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call ShowHex
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;NEW LINE
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ld a,13
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call PrintChar
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ld a,10
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call PrintChar
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pop hl
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;NEXT HL
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inc hl
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;COMPARE HL TO ZERO
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ld a,h
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or l
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jr nz,main ;IF NOT ZERO, REPEAT
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ret ;RETURN TO BASIC
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ShowHex:
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push af
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and %11110000
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rrca
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rrca
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rrca
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rrca
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call PrintHexChar
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pop af
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and %00001111
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;call PrintHexChar
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;execution flows into it naturally.
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PrintHexChar:
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;this converts hexadecimal to ascii.
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or a ;Clear Carry Flag
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daa
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add a,&F0
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adc a,&40
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jp PrintChar
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;ret
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