98 lines
1.5 KiB
Plaintext
98 lines
1.5 KiB
Plaintext
.include "../platform/c64_0.oph"
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.require "../platform/c64kernal.oph"
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.data
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.org $C000
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.text
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.macro print
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lda #<_1
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ldx #>_1
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jsr printstr
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.macend
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.macro greet
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lda #30
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jsr delay
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`print hello1
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`print _1
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`print hello2
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.macend
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lda #147
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jsr chrout
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`greet target1
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`greet target2
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`greet target3
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`greet target4
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`greet target5
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`greet target6
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`greet target7
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`greet target8
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`greet target9
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`greet target10
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rts
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hello1: .byte "HELLO, ",0
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hello2: .byte "!", 13, 0
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target1: .byte "PROGRAMMER", 0
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target2: .byte "ROOM", 0
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target3: .byte "BUILDING", 0
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target4: .byte "NEIGHBORHOOD", 0
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target5: .byte "CITY", 0
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target6: .byte "NATION", 0
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target7: .byte "WORLD", 0
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target8: .byte "SOLAR SYSTEM", 0
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target9: .byte "GALAXY", 0
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target10: .byte "UNIVERSE", 0
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; DELAY routine. Takes values from the Accumulator and pauses
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; for that many jiffies (1/60th of a second).
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.scope
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.data
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.space _tmp 1
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.space _target 1
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.text
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delay: sta _tmp ; save argument (rdtim destroys it)
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jsr rdtim
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clc
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adc _tmp ; add current time to get target
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sta _target
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* jsr rdtim
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cmp _target
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bmi - ; Buzz until target reached
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rts
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.scend
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; PRINTSTR routine. Accumulator stores the low byte of the address,
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; X register stores the high byte. Destroys the values of $10 and
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; $11.
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.scope
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.data zp
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.space _ptr 2
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.text
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printstr:
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sta _ptr
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stx _ptr+1
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ldy #$00
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_lp: lda (_ptr),y
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beq _done
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jsr chrout
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iny
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bne _lp
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_done: rts
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.scend
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.checkpc $A000
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.data
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.checkpc $D000
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.data zp
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.checkpc $80
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