mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-01 01:06:33 +00:00
120 lines
2.0 KiB
ArmAsm
120 lines
2.0 KiB
ArmAsm
; make pictures by drawing boxes
|
|
|
|
; 223 -- initial
|
|
; 220 -- update end
|
|
; 219 -- store color already multiplied by 17
|
|
; 215 -- load Y0 directly into X
|
|
; 211 -- load X1 directly into H2
|
|
; 208 -- add subroutine to read byte into A, no need to save Y
|
|
; 205 -- optimize end loop
|
|
; 197 -- only update color if changed
|
|
|
|
.include "zp.inc"
|
|
.include "hardware.inc"
|
|
|
|
X0 = $F0
|
|
Y1 = $F3
|
|
|
|
|
|
;1DEFFNP(X)=PEEK(2054+I*5+X)-32:
|
|
;GR:POKE49234,0:
|
|
;FORI=0TO29:COLOR=FNP(0):FORY=FNP(3)TOFNP(4)
|
|
;:HLINFNP(1),FNP(2)ATY:NEXTY,I:GETA
|
|
|
|
|
|
;================================
|
|
; Clear screen and setup graphics
|
|
;================================
|
|
boxes:
|
|
|
|
jsr SETGR ; set lo-res 40x40 mode
|
|
bit FULLGR ; make it 40x48
|
|
|
|
draw_box_loop:
|
|
|
|
; get color
|
|
|
|
jsr load_byte
|
|
bmi use_old_color
|
|
cmp #$7F
|
|
end:
|
|
beq end ; hit end
|
|
|
|
jsr SETCOL
|
|
|
|
jsr load_byte ; Y0
|
|
|
|
use_old_color:
|
|
and #$3f
|
|
tax
|
|
|
|
jsr load_byte ; Y1
|
|
sta Y1
|
|
|
|
jsr load_byte ; X0
|
|
sta X0
|
|
|
|
jsr load_byte ; X1
|
|
sta H2
|
|
|
|
inner_loop:
|
|
|
|
;; HLINE Y,H2 at A
|
|
;; X left alone, carry set on exit
|
|
;; H2 left alone
|
|
;; Y and A trashed
|
|
|
|
ldy X0
|
|
txa
|
|
jsr HLINE
|
|
|
|
cpx Y1
|
|
inx
|
|
bcc inner_loop
|
|
bcs draw_box_loop
|
|
|
|
|
|
load_byte:
|
|
inc load_byte_smc+1 ; assume we are always < 256 bytes
|
|
; so no need to wrap
|
|
load_byte_smc:
|
|
lda box_data-1
|
|
|
|
rts
|
|
|
|
|
|
; 4 6 6 6 6
|
|
box_data:
|
|
|
|
.byte $0F,$00,$2F,$00,$27
|
|
.byte $08,$01,$2B,$0A,$1B
|
|
.byte $0D,$28,$29,$03,$14
|
|
.byte $A4,$27,$03,$16
|
|
.byte $A0,$23,$05,$17
|
|
.byte $9C,$1F,$08,$18
|
|
.byte $08,$23,$26,$07,$0E
|
|
.byte $A4,$27,$08,$12
|
|
.byte $9F,$1F,$0D,$12
|
|
.byte $05,$2A,$2B,$03,$14
|
|
.byte $AC,$2D,$06,$13
|
|
.byte $08,$2C,$2D,$14,$17
|
|
.byte $88,$16,$1C,$1C
|
|
.byte $0D,$02,$1A,$09,$18
|
|
.byte $08,$04,$18,$0A,$15
|
|
.byte $00,$06,$17,$0B,$14
|
|
.byte $08,$15,$29,$22,$22
|
|
.byte $93,$28,$22,$24
|
|
.byte $05,$13,$14,$1C,$23
|
|
.byte $95,$16,$1B,$21
|
|
.byte $0D,$17,$2B,$19,$21
|
|
.byte $00,$18,$20,$1A,$20
|
|
.byte $A2,$2A,$1A,$20
|
|
.byte $05,$1C,$1C,$1B,$20
|
|
.byte $A6,$26,$1B,$20
|
|
.byte $03,$1F,$20,$1F,$1F
|
|
.byte $A9,$2A,$1F,$1F
|
|
.byte $05,$19,$1E,$1D,$1E
|
|
.byte $A3,$28,$1D,$1E
|
|
.byte $0C,$02,$03,$17,$17
|
|
.byte $7F
|