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https://github.com/deater/dos33fsprogs.git
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86 lines
1.0 KiB
ArmAsm
86 lines
1.0 KiB
ArmAsm
;========================
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; print score
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;========================
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print_score:
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lda #<score_text
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sta OUTL
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lda #>score_text
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sta OUTH
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jmp hgr_put_string
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; tail call does rts for us
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;==========================
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; update score
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;==========================
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; we have to handle 1, 2 or 3 digits
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update_score:
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ldx #9 ; offset of first digit in string
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sed ; set decimal mode
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lda #0
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sta update_leading_zero_smc+1
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update_hundreds:
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lda SCORE_HUNDREDS
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beq update_tens
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inc update_leading_zero_smc+1
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clc
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adc #'0'
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sta score_text,X
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inx
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update_tens:
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lda SCORE_TENSONES
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lsr
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lsr
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lsr
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lsr
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bne update_go_tens
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update_leading_zero_smc:
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cmp #0
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beq update_ones
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update_go_tens:
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clc
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adc #'0'
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sta score_text,X
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inx
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update_ones:
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lda SCORE_TENSONES
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and #$f
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clc
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adc #'0'
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sta score_text,X
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inx
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ldy #0
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copy_tail_loop:
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lda score_tail,Y
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sta score_text,X
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beq done_copy_tail_loop
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inx
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iny
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jmp copy_tail_loop
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done_copy_tail_loop:
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cld ; clear decimal mode
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rts
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score_text:
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.byte 0,2,"Score: 0 of 150",0,0,0
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score_tail:
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.byte " of 150",0
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