mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-15 02:05:16 +00:00
168 lines
2.1 KiB
ArmAsm
168 lines
2.1 KiB
ArmAsm
;=============================
|
|
; show VMW splash screen
|
|
;=============================
|
|
opening:
|
|
lda #100
|
|
sta MATCH
|
|
jsr draw_logo
|
|
jsr page_flip
|
|
|
|
;clc
|
|
;infinity:
|
|
;bcc infinity
|
|
|
|
; Draw the shining band
|
|
|
|
lda #0
|
|
sta MATCH
|
|
shine_loop:
|
|
|
|
jsr draw_logo
|
|
jsr page_flip
|
|
|
|
inc MATCH
|
|
lda MATCH
|
|
cmp #30
|
|
bne shine_loop
|
|
|
|
; Done, print string
|
|
|
|
lda #8
|
|
sta CH ; HTAB 9
|
|
|
|
lda #20
|
|
sta CV ; VTAB 21
|
|
|
|
|
|
lda #>(vmwsw_string)
|
|
sta OUTH
|
|
lda #<(vmwsw_string)
|
|
sta OUTL
|
|
|
|
jsr move_and_print ; print("A VMW SOFTWARE PRODUCTION");
|
|
|
|
jsr page_flip
|
|
|
|
jsr wait_until_keypressed
|
|
|
|
rts
|
|
|
|
|
|
;=====================
|
|
; display part of logo
|
|
;=====================
|
|
;
|
|
draw_segment:
|
|
lda #0
|
|
sta LOOP
|
|
|
|
segment_loop:
|
|
lda YADD
|
|
clc
|
|
adc YY
|
|
sta YY ; yy=yy+yadd
|
|
|
|
lda COLOR1
|
|
sta COLOR ; color=COLOR1
|
|
|
|
lda MATCH ; if (ram[XX]==ram[MATCH])
|
|
cmp XX
|
|
bne nocolmatch1
|
|
|
|
lda COLOR ; color_equals(ram[COLOR1]*3);
|
|
clc
|
|
adc COLOR1
|
|
adc COLOR1
|
|
sta COLOR
|
|
|
|
nocolmatch1:
|
|
lda YY
|
|
sta V2
|
|
lda XX
|
|
clc
|
|
adc #9
|
|
tay
|
|
lda #10
|
|
tax
|
|
|
|
jsr vlin ; X,V2 at Y vlin(10,ram[YY],9+ram[XX]);
|
|
|
|
lda COLOR2
|
|
sta COLOR ; color=COLOR2
|
|
|
|
lda MATCH ; if (ram[XX]==ram[MATCH])
|
|
cmp XX
|
|
bne nocolmatch2
|
|
|
|
lda COLOR ; color_equals(ram[COLOR2]*3);
|
|
clc
|
|
adc COLOR2
|
|
adc COLOR2
|
|
sta COLOR
|
|
|
|
nocolmatch2:
|
|
lda #34
|
|
sta V2
|
|
lda XX
|
|
clc
|
|
adc #9
|
|
tay
|
|
lda YY
|
|
cmp #34
|
|
beq skip_bottom ; if (ram[YY]==34) skip
|
|
tax
|
|
jsr vlin ; X,V2 at Y vlin(ram[YY],34,9+ram[XX]);
|
|
|
|
skip_bottom:
|
|
|
|
|
|
inc XX ; ram[XX]++;
|
|
|
|
inc LOOP
|
|
lda LOOP
|
|
cmp #4
|
|
bne segment_loop
|
|
|
|
lda YADD ; ram[YADD]=-ram[YADD];
|
|
eor #$ff
|
|
clc
|
|
adc #1
|
|
sta YADD
|
|
|
|
rts
|
|
|
|
;=================
|
|
; display VMW logo
|
|
;=================
|
|
;
|
|
draw_logo:
|
|
lda #0
|
|
sta XX ; start of logo
|
|
lda #10
|
|
sta YY ; draw at Y=10
|
|
lda #6
|
|
sta YADD ; step of 6
|
|
|
|
lda #$00
|
|
sta COLOR2
|
|
lda #$11
|
|
sta COLOR1 ; first colors are red/black
|
|
jsr draw_segment
|
|
lda #$44
|
|
sta COLOR2 ; now red/green
|
|
jsr draw_segment
|
|
lda #$22
|
|
sta COLOR1 ; now green/blue
|
|
jsr draw_segment
|
|
jsr draw_segment
|
|
jsr draw_segment
|
|
lda #$00
|
|
sta COLOR2 ; now blue/black
|
|
jsr draw_segment
|
|
|
|
rts
|
|
|
|
vmwsw_string:
|
|
.asciiz "A VMW SOFTWARE PRODUCTION"
|
|
|