178 lines
2.5 KiB
ArmAsm
178 lines
2.5 KiB
ArmAsm
; Draw Status Bar
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;===========================
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; inc_score_by_10
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;===========================
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; FIXME: make sure interrupt routine handles d flag properly
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inc_score_by_10:
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sed
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lda SCORE0
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clc
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adc #$10
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sta SCORE0
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lda SCORE1
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adc #0
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sta SCORE1
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lda SCORE2
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adc #0
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sta SCORE2
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cld
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jsr update_score
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rts
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;===========================
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; update score
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;===========================
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update_score:
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lda SCORE0
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and #$f
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ora #$b0 ; 0 -> $b0
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sta status_string+6
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lda SCORE0
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lsr
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lsr
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lsr
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lsr
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ora #$b0 ; 0 -> $b0
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sta status_string+5
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lda SCORE1
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and #$f
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ora #$b0 ; 0 -> $b0
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sta status_string+4
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lda SCORE1
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lsr
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lsr
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lsr
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lsr
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ora #$b0 ; 0 -> $b0
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sta status_string+3
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lda SCORE2
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and #$f
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ora #$b0 ; 0 -> $b0
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sta status_string+2
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lda #2
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sta UPDATE_STATUS
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rts
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;===========================
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; update health
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;===========================
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update_health:
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ldx #0
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update_health_loop:
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cpx HEALTH
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bcc health_on
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lda #'_'|$80
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bne done_health
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health_on:
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lda #' '
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done_health:
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sta status_string+9,X
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inx
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cpx #8
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bne update_health_loop
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rts
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;===========================
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; update items
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;===========================
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update_items:
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lda INVENTORY
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and #INV_RED_KEY
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beq done_red_key
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lda #'R'&$3f
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sta status_string+33
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done_red_key:
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lda INVENTORY
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and #INV_BLUE_KEY
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beq done_blue_key
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lda #'B'&$3f
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sta status_string+35
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done_blue_key:
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rts
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;===========================
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; update the status bar
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;===========================
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update_status_bar:
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jsr update_score
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jsr update_health
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jsr update_items
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lda #2
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sta UPDATE_STATUS
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rts
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;===========================
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; draw the status bar
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;===========================
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draw_status_bar:
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; to improve frame rate, only draw if update status set?
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; not implemented yet
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jsr inverse_text ; print help node
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lda #<help_string
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sta OUTL
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lda #>help_string
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sta OUTH
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jsr move_and_print
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jsr normal_text ; (normal)
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jsr move_and_print ; print explain text
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jsr raw_text
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jsr move_and_print ; print status line
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rts
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help_string:
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.byte 3,20," PRESS 'H' FOR HELP ",0
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score_string:
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; 012456789012345678901234567890123456789
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.byte 0,22,"SCORE HEALTH FIREPOWER INVENTORY",0
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status_string:
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; .byte 0,23,"ZZZZZ XXXXXXXX =- ",0
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.byte 0,23,"ZZZZZ"
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.byte ' '|$80,' '|$80
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.byte "XXXXXXXX"
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.byte ' '|$80,' '|$80
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.byte '='|$80,'-'|$80,' '|$80,' '|$80,' '|$80,' '|$80,' '|$80,' '|$80,' '|$80,' '|$80
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.byte ' '|$80,' '|$80,' '|$80,' '|$80,' '|$80,' '|$80,' '|$80,' '|$80,' '|$80,' '|$80,' '|$80,' '|$80,0
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