mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-04 20:06:09 +00:00
126 lines
1.5 KiB
ArmAsm
126 lines
1.5 KiB
ArmAsm
|
; Display falling snow
|
||
|
|
|
||
|
|
; by deater (Vince Weaver) <vince@deater.net>
|
||
|
|
|
||
|
|
; Zero Page
|
||
|
|
FRAMEBUFFER = $00 ; $00 - $0F
|
||
|
|
YPOS = $10
|
||
|
|
YPOS_SIN = $11
|
||
|
|
CH = $24
|
||
|
|
CV = $25
|
||
|
|
GBASL = $26
|
||
|
|
GBASH = $27
|
||
|
|
BASL = $28
|
||
|
|
BASH = $29
|
||
|
|
FRAME = $60
|
||
|
|
WAITING = $62
|
||
|
|
LETTERL = $63
|
||
|
|
LETTERH = $64
|
||
|
|
LETTERX = $65
|
||
|
|
LETTERY = $66
|
||
|
|
LETTERD = $67
|
||
|
|
LETTER = $68
|
||
|
|
BLARGH = $69
|
||
|
|
HGR_COLOR = $E4
|
||
|
|
STATE = $ED
|
||
|
|
DRAW_PAGE = $EE
|
||
|
|
LASTKEY = $F1
|
||
|
|
PADDLE_STATUS = $F2
|
||
|
|
TEMP = $FA
|
||
|
|
|
||
|
|
SNOWX = $F0
|
||
|
|
|
||
|
|
|
||
|
|
.include "hardware.inc"
|
||
|
|
|
||
|
|
|
||
|
|
;==================================
|
||
|
|
;==================================
|
||
|
|
|
||
|
|
jsr hgr
|
||
|
|
|
||
|
|
bit PAGE0
|
||
|
|
bit SET_GR
|
||
|
|
bit FULLGR
|
||
|
|
bit HIRES
|
||
|
|
|
||
|
|
display_loop:
|
||
|
|
|
||
|
|
;=========================
|
||
|
|
; erase old snow
|
||
|
|
|
||
|
|
ldx #0
|
||
|
|
jsr hcolor_equals
|
||
|
|
ldx #0
|
||
|
|
erase_loop:
|
||
|
|
stx SNOWX
|
||
|
|
ldx SNOWX
|
||
|
|
ldy snow_xhs,X
|
||
|
|
lda snow_ys,X
|
||
|
|
pha
|
||
|
|
lda snow_xls,X
|
||
|
|
tax
|
||
|
|
pla
|
||
|
|
jsr hplot0
|
||
|
|
|
||
|
|
inc SNOWX
|
||
|
|
ldx SNOWX
|
||
|
|
cpx #8
|
||
|
|
bne erase_loop
|
||
|
|
|
||
|
|
;=========================
|
||
|
|
; draw new snow
|
||
|
|
|
||
|
|
|
||
|
|
ldx #3
|
||
|
|
jsr hcolor_equals
|
||
|
|
|
||
|
|
ldx #0
|
||
|
|
draw_loop:
|
||
|
|
stx SNOWX
|
||
|
|
ldx SNOWX
|
||
|
|
|
||
|
|
inc snow_ys,X
|
||
|
|
lda snow_ys,X
|
||
|
|
cmp #192
|
||
|
|
bne snow_done
|
||
|
|
|
||
|
|
lda #0
|
||
|
|
sta snow_ys,X
|
||
|
|
|
||
|
|
snow_done:
|
||
|
|
ldy snow_xhs,X
|
||
|
|
lda snow_ys,X
|
||
|
|
pha
|
||
|
|
lda snow_xls,X
|
||
|
|
tax
|
||
|
|
pla
|
||
|
|
jsr hplot0
|
||
|
|
|
||
|
|
inc SNOWX
|
||
|
|
ldx SNOWX
|
||
|
|
cpx #8
|
||
|
|
bne draw_loop
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
jmp display_loop ; 3
|
||
|
|
|
||
|
|
|
||
|
|
snow_xls:
|
||
|
|
.byte 10,30,50,70,90,110,0,10
|
||
|
|
snow_xhs:
|
||
|
|
.byte 0,0,0,0,0,0,1,1
|
||
|
|
|
||
|
|
snow_ys:
|
||
|
|
.byte 0,0,0,0,0,0,0,0
|
||
|
|
|
||
|
|
;.include "state_machine.s"
|
||
|
|
;.include "gr_hline.s"
|
||
|
|
;.include "../asm_routines/keypress.s"
|
||
|
|
;.include "gr_copy.s"
|
||
|
|
;.include "random16.s"
|
||
|
|
;.include "fw.s"
|
||
|
|
.include "hgr.s"
|
||
|
|
|