dos33fsprogs/duke/status_bar.s
2020-12-16 15:39:27 -05:00

178 lines
2.5 KiB
ArmAsm

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