mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-26 11:30:12 +00:00
603 lines
10 KiB
ArmAsm
603 lines
10 KiB
ArmAsm
; Uses the 40x48d page1/page2 every-1-scanline pageflip mode
|
|
|
|
; self modifying code to get some extra colors (pseudo 40x192 mode)
|
|
|
|
; by deater (Vince Weaver) <vince@deater.net>
|
|
|
|
credits:
|
|
|
|
;===================
|
|
; init screen
|
|
jsr TEXT
|
|
jsr HOME
|
|
bit KEYRESET
|
|
|
|
;===================
|
|
; init vars
|
|
|
|
lda #0
|
|
sta DRAW_PAGE
|
|
sta FRAME
|
|
|
|
lda #<credits_text
|
|
sta CREDITS_POINTERL
|
|
lda #>credits_text
|
|
sta CREDITS_POINTERH
|
|
|
|
;==================
|
|
; setup graphics
|
|
|
|
jsr create_update_type1
|
|
jsr setup_rasterbars
|
|
|
|
; change to page0/page0/page1/page1 for first 32 lines
|
|
; 0101010101010101010101010101010101010101
|
|
; 1100110011001100110011001100110011001100
|
|
; | *| *| *| *--------| *| *| *| *
|
|
; 0 34 78 12 5 4 78 12 56 9
|
|
; 11 1 2 22 33 33 3
|
|
lda #$54
|
|
sta $9001+(49*3)
|
|
sta $9001+(49*7)
|
|
sta $9001+(49*11)
|
|
sta $9001+(49*15)
|
|
sta $9001+(49*27)
|
|
sta $9001+(49*31)
|
|
sta $9001+(49*35)
|
|
sta $9001+(49*39)
|
|
|
|
lda #$55
|
|
sta $9001+(49*0)
|
|
sta $9001+(49*4)
|
|
sta $9001+(49*8)
|
|
sta $9001+(49*12)
|
|
sta $9001+(49*24)
|
|
sta $9001+(49*28)
|
|
sta $9001+(49*32)
|
|
sta $9001+(49*36)
|
|
|
|
|
|
;=============================
|
|
; Load graphic page0
|
|
|
|
lda #<credits_low
|
|
sta GBASL
|
|
lda #>credits_low
|
|
sta GBASH
|
|
|
|
lda #$c ; load image to $c00
|
|
|
|
jsr load_rle_gr
|
|
|
|
lda #4
|
|
sta DRAW_PAGE
|
|
|
|
jsr gr_copy_to_current ; copy to page1
|
|
|
|
; GR part
|
|
bit PAGE1
|
|
bit LORES ; 4
|
|
bit SET_GR ; 4
|
|
bit FULLGR ; 4
|
|
|
|
; jsr wait_until_keypressed
|
|
|
|
|
|
;=============================
|
|
; Load graphic page1
|
|
|
|
lda #<credits_high
|
|
sta GBASL
|
|
lda #>credits_high
|
|
sta GBASH
|
|
lda #$c ; load to $c00
|
|
jsr load_rle_gr
|
|
|
|
lda #0
|
|
sta DRAW_PAGE
|
|
|
|
jsr gr_copy_to_current
|
|
|
|
; GR part
|
|
bit PAGE0
|
|
|
|
; jsr wait_until_keypressed
|
|
|
|
|
|
;==============================
|
|
; setup graphics for vapor lock
|
|
;==============================
|
|
|
|
jsr vapor_lock
|
|
|
|
; vapor lock returns with us at beginning of hsync in line
|
|
; 114 (7410 cycles), so with 5070 lines to go
|
|
|
|
; GR part
|
|
bit LORES ; 4
|
|
bit SET_GR ; 4
|
|
bit FULLGR ; 4
|
|
|
|
jsr gr_copy_to_current ; 6+ 9292
|
|
|
|
; 5070 + 4550 = 9620
|
|
; 9292
|
|
; 12
|
|
; 6
|
|
; ====
|
|
; 310
|
|
|
|
; - 3 for jmp
|
|
; 307
|
|
|
|
; Try X=9 Y=6 cycles=307
|
|
|
|
ldy #6 ; 2
|
|
tloopA: ldx #9 ; 2
|
|
tloopB: dex ; 2
|
|
bne tloopB ; 2nt/3
|
|
dey ; 2
|
|
bne tloopA ; 2nt/3
|
|
|
|
jmp credits_loop ; 3
|
|
|
|
.align $100
|
|
|
|
;================================================
|
|
; Display Loop
|
|
;================================================
|
|
; each scan line 65 cycles
|
|
; 1 cycle each byte (40cycles) + 25 for horizontal
|
|
; Total of 12480 cycles to draw screen
|
|
; Vertical blank = 4550 cycles (70 scan lines)
|
|
; Total of 17030 cycles to get back to where was
|
|
|
|
; We want to alternate between page1 and page2 every 65 cycles
|
|
; vblank = 4550 cycles to do scrolling
|
|
|
|
|
|
credits_loop:
|
|
|
|
jsr $9000
|
|
|
|
;======================================================
|
|
; We have 4550 cycles in the vblank, use them wisely
|
|
;======================================================
|
|
|
|
; 4550 -- VBLANK
|
|
; -582 -- erase 22+4*(8+6+126) = 582
|
|
; -696 -- move+draw 4*(16+26+6+126) = 696
|
|
; -10 -- keypress
|
|
; -12 -- call/return of draw code
|
|
; -446 -- do_words
|
|
;=======
|
|
; 2804
|
|
|
|
pad_time:
|
|
|
|
; we erase, then draw
|
|
; doing a blanket erase of all 128 lines would cost 3459 cycles!
|
|
|
|
;=========================
|
|
; do words
|
|
;=========================
|
|
|
|
jsr draw_credits ; 6+440
|
|
|
|
;=========================
|
|
; ERASE
|
|
;=========================
|
|
|
|
lda #$00 ; 2
|
|
sta smc_raster_color1_1+1 ; 4
|
|
sta smc_raster_color1_2+1 ; 4
|
|
sta smc_raster_color2_1+1 ; 4
|
|
sta smc_raster_color2_2+1 ; 4
|
|
sta smc_raster_color3_1+1 ; 4
|
|
;=============
|
|
; 22
|
|
|
|
; erase red
|
|
|
|
lda red_x ; 4
|
|
and #$7f ; 2
|
|
tax ; 2
|
|
|
|
jsr draw_rasterbar ; 6+126
|
|
|
|
; erase yellow
|
|
|
|
lda yellow_x ; 4
|
|
and #$7f ; 2
|
|
tax ; 2
|
|
|
|
jsr draw_rasterbar ; 6+126
|
|
|
|
; erase green
|
|
|
|
lda green_x ; 4
|
|
and #$7f ; 2
|
|
tax ; 2
|
|
|
|
jsr draw_rasterbar ; 6+126
|
|
|
|
; erase red
|
|
|
|
lda blue_x ; 4
|
|
and #$7f ; 2
|
|
tax ; 2
|
|
|
|
jsr draw_rasterbar ; 6+126
|
|
|
|
|
|
;=========================
|
|
; MOVE and DRAW
|
|
;=========================
|
|
|
|
|
|
;============
|
|
; move red
|
|
|
|
ldy red_x ; 4
|
|
lda movement_table,Y ; 4
|
|
sta red_x ; 4
|
|
and #$7f ; 2
|
|
tax ; 2
|
|
;==========
|
|
; 16
|
|
|
|
; draw red
|
|
|
|
lda #$33 ; 2
|
|
sta smc_raster_color1_1+1 ; 4
|
|
sta smc_raster_color1_2+1 ; 4
|
|
lda #$bb ; 2
|
|
sta smc_raster_color2_1+1 ; 4
|
|
sta smc_raster_color2_2+1 ; 4
|
|
lda #$ff ; 2
|
|
sta smc_raster_color3_1+1 ; 4
|
|
;=============
|
|
; 26
|
|
|
|
|
|
jsr draw_rasterbar ; 6+126
|
|
|
|
|
|
;============
|
|
; move yellow
|
|
|
|
ldy yellow_x ; 4
|
|
lda movement_table,Y ; 4
|
|
sta yellow_x ; 4
|
|
and #$7f ; 2
|
|
tax ; 2
|
|
;==========
|
|
; 16
|
|
|
|
; draw yellow
|
|
|
|
lda #$88 ; 2
|
|
sta smc_raster_color1_1+1 ; 4
|
|
sta smc_raster_color1_2+1 ; 4
|
|
lda #$dd ; 2
|
|
sta smc_raster_color2_1+1 ; 4
|
|
sta smc_raster_color2_2+1 ; 4
|
|
lda #$ff ; 2
|
|
sta smc_raster_color3_1+1 ; 4
|
|
;=============
|
|
; 26
|
|
|
|
|
|
jsr draw_rasterbar ; 6+126
|
|
|
|
;============
|
|
; move green
|
|
|
|
ldy green_x ; 4
|
|
lda movement_table,Y ; 4
|
|
sta green_x ; 4
|
|
and #$7f ; 2
|
|
tax ; 2
|
|
;==========
|
|
; 16
|
|
|
|
; draw green
|
|
|
|
lda #$44 ; 2
|
|
sta smc_raster_color1_1+1 ; 4
|
|
sta smc_raster_color1_2+1 ; 4
|
|
lda #$cc ; 2
|
|
sta smc_raster_color2_1+1 ; 4
|
|
sta smc_raster_color2_2+1 ; 4
|
|
lda #$ff ; 2
|
|
sta smc_raster_color3_1+1 ; 4
|
|
;=============
|
|
; 26
|
|
|
|
|
|
jsr draw_rasterbar ; 6+126
|
|
|
|
;============
|
|
; move blue
|
|
|
|
ldy blue_x ; 4
|
|
lda movement_table,Y ; 4
|
|
sta blue_x ; 4
|
|
and #$7f ; 2
|
|
tax ; 2
|
|
;==========
|
|
; 16
|
|
|
|
; draw blue
|
|
|
|
lda #$22 ; 2
|
|
sta smc_raster_color1_1+1 ; 4
|
|
sta smc_raster_color1_2+1 ; 4
|
|
lda #$66 ; 2
|
|
sta smc_raster_color2_1+1 ; 4
|
|
sta smc_raster_color2_2+1 ; 4
|
|
lda #$ff ; 2
|
|
sta smc_raster_color3_1+1 ; 4
|
|
;=============
|
|
; 26
|
|
|
|
|
|
jsr draw_rasterbar ; 6+126
|
|
|
|
|
|
|
|
|
|
;============================
|
|
; WAIT for VBLANK to finish
|
|
;============================
|
|
|
|
; Try X=61 Y=9 cycles=2800 R4
|
|
nop
|
|
nop
|
|
|
|
ldy #9 ; 2
|
|
tloop1: ldx #61 ; 2
|
|
tloop2: dex ; 2
|
|
bne tloop2 ; 2nt/3
|
|
dey ; 2
|
|
bne tloop1 ; 2nt/3
|
|
|
|
|
|
lda KEYPRESS ; 4
|
|
bpl cno_keypress ; 3
|
|
rts
|
|
|
|
cno_keypress:
|
|
|
|
jmp credits_loop ; 3
|
|
|
|
|
|
;========================
|
|
; Draw a rasterbar
|
|
; unroll as memory is free! haha
|
|
;========================
|
|
; X is location
|
|
|
|
; 2+22+24+24+24+24+6 = 126
|
|
|
|
draw_rasterbar:
|
|
|
|
ldy #0 ; 2
|
|
;====
|
|
|
|
lda y_lookup_l,X ; 4
|
|
sta OUTL ; 3
|
|
lda y_lookup_h,X ; 4
|
|
sta OUTH ; 3
|
|
|
|
smc_raster_color1_1:
|
|
lda #$33 ; 2
|
|
sta (OUTL),Y ; 6
|
|
;============
|
|
; 22
|
|
|
|
inx ; 2
|
|
lda y_lookup_l,X ; 4
|
|
sta OUTL ; 3
|
|
lda y_lookup_h,X ; 4
|
|
sta OUTH ; 3
|
|
|
|
smc_raster_color2_1:
|
|
lda #$bb ; 2
|
|
sta (OUTL),Y ; 6
|
|
|
|
inx ; 2
|
|
lda y_lookup_l,X ; 4
|
|
sta OUTL ; 3
|
|
lda y_lookup_h,X ; 4
|
|
sta OUTH ; 3
|
|
|
|
smc_raster_color3_1:
|
|
lda #$ff ; 2
|
|
sta (OUTL),Y ; 6
|
|
|
|
inx
|
|
lda y_lookup_l,X ; 4
|
|
sta OUTL ; 3
|
|
lda y_lookup_h,X ; 4
|
|
sta OUTH ; 3
|
|
|
|
smc_raster_color2_2:
|
|
lda #$bb ; 2
|
|
sta (OUTL),Y ; 6
|
|
|
|
inx
|
|
lda y_lookup_l,X ; 4
|
|
sta OUTL ; 3
|
|
lda y_lookup_h,X ; 4
|
|
sta OUTH ; 3
|
|
|
|
smc_raster_color1_2:
|
|
lda #$33 ; 2
|
|
sta (OUTL),Y ; 6
|
|
|
|
rts ; 6
|
|
|
|
|
|
red_x: .byte $10
|
|
yellow_x: .byte $20
|
|
green_x: .byte $30
|
|
blue_x: .byte $40
|
|
|
|
|
|
;=================================
|
|
; draw credits
|
|
;=================================
|
|
; credits pointer
|
|
;
|
|
; noframe: 13 = 13 (need 427) +12
|
|
; end: 13+12= 25 (need 415) +83
|
|
; newchar: 13+12+4+79 = 108 (need 333) +332
|
|
; putchar: 13+12+4+377+28+6 = 440
|
|
|
|
draw_credits:
|
|
inc FRAME ; 5
|
|
lda FRAME ; 3
|
|
and #$f ; 2
|
|
beq credits_handle_next ; 3
|
|
;====
|
|
; 13
|
|
credits_long_delay:
|
|
; -1
|
|
; 12+1 = 13 cycles
|
|
|
|
lda TEMP ; 3
|
|
lda TEMP ; 3
|
|
lda TEMP ; 3
|
|
nop ; 2
|
|
nop ; 2
|
|
|
|
credits_skip:
|
|
; 83 cycles
|
|
lda #56 ; 2
|
|
jsr delay_a ; delay 25+a (81)
|
|
|
|
credits_short_delay:
|
|
; 332 cycles-6 = 326
|
|
|
|
; 83 cycles
|
|
lda #56 ; 2
|
|
jsr delay_a ; delay 25+a (81)
|
|
|
|
; 243 cycles
|
|
lda #216 ; 2
|
|
jsr delay_a ; delay 25+a (241)
|
|
|
|
rts ; 6
|
|
|
|
|
|
credits_handle_next:
|
|
ldy #0 ; 2
|
|
lda (CREDITS_POINTERL),Y ; 5
|
|
cmp #$ff ; 2
|
|
beq credits_skip ; 3
|
|
;===
|
|
; 12
|
|
|
|
; -1
|
|
cmp #'@' ; 2
|
|
bcs credits_put_char ; bge ; 3
|
|
;====
|
|
; 4
|
|
|
|
credits_check_xy:
|
|
; -1
|
|
sta CREDITS_Y ; 3
|
|
iny ; 2
|
|
lda (CREDITS_POINTERL),Y ; 5
|
|
sta CREDITS_X ; 3
|
|
iny ; 2
|
|
;====
|
|
; 14
|
|
|
|
lda (CREDITS_POINTERL),Y ; 5
|
|
sta colors_hi ; 4
|
|
iny ; 2
|
|
lda (CREDITS_POINTERL),Y ; 5
|
|
sta colors_hi+1 ; 4
|
|
iny ; 2
|
|
lda (CREDITS_POINTERL),Y ; 5
|
|
sta colors_lo ; 4
|
|
iny ; 2
|
|
lda (CREDITS_POINTERL),Y ; 5
|
|
sta colors_lo+1 ; 4
|
|
iny ; 2
|
|
;===
|
|
; 44
|
|
|
|
clc ; 2
|
|
tya ; 2
|
|
adc CREDITS_POINTERL ; 3
|
|
sta CREDITS_POINTERL ; 3
|
|
lda #0 ; 2
|
|
adc CREDITS_POINTERH ; 3
|
|
sta CREDITS_POINTERH ; 3
|
|
|
|
jmp credits_short_delay ; 3
|
|
;====
|
|
; 21
|
|
credits_put_char:
|
|
ldx CREDITS_X ; 3
|
|
ldy CREDITS_Y ; 3
|
|
jsr put_char ; 6+365
|
|
;======
|
|
; 377
|
|
|
|
clc ; 2
|
|
lda CREDITS_X ; 3
|
|
adc #4 ; 2
|
|
sta CREDITS_X ; 3
|
|
|
|
clc ; 2
|
|
lda #1 ; 2
|
|
adc CREDITS_POINTERL ; 3
|
|
sta CREDITS_POINTERL ; 3
|
|
lda #0 ; 2
|
|
adc CREDITS_POINTERH ; 3
|
|
sta CREDITS_POINTERH ; 3
|
|
;=====
|
|
; 28
|
|
|
|
draw_credits_end:
|
|
rts ; 6
|
|
|
|
.align $100
|
|
credits_text:
|
|
.byte 0,10, $B1,$3F,$F3,$1B, 'C','O','D','E','[' ; "CODE:"
|
|
.byte 6,8, $B1,$3F,$F3,$1B, 'D','E','A','T','E','R' ; "DEATER"
|
|
.byte '@','@' ; time pad
|
|
.byte 0,10, $00,$00,$00,$00, 'C','O','D','E','[' ; "CODE:"
|
|
.byte 6,8, $00,$00,$00,$00, 'D','E','A','T','E','R' ; "DEATER"
|
|
|
|
.byte 0,8, $D8,$9F,$F9,$8D, 'M','U','S','I','C','[' ; "MUSIC:"
|
|
.byte 6,14, $D8,$9F,$F9,$8D, 'D','Y','A' ; "DYA"
|
|
.byte '@','@' ; time pad
|
|
.byte 0,8, $00,$00,$00,$00, 'M','U','S','I','C','[' ; "MUSIC:"
|
|
.byte 6,14, $00,$00,$00,$00, 'D','Y','A' ; "DYA"
|
|
|
|
.byte 0,8, $72,$6F,$F6,$27, 'M','A','G','I','C','[' ; "MAGIC:"
|
|
.byte 6,8, $72,$6F,$F6,$27, 'Q','K','U','M','B','A' ; "QKUMBA"
|
|
.byte '@','@' ; time pad
|
|
.byte 0,8, $00,$00,$00,$00, 'M','A','G','I','C','[' ; "MAGIC:"
|
|
.byte 6,8, $00,$00,$00,$00, 'Q','K','U','M','B','A' ; "QKUMBA"
|
|
|
|
.byte 0,8, $C4,$CF,$FC,$4C, 'T','H','A','N','K','S' ; "THANKS"
|
|
.byte 6,4, $C4,$CF,$FC,$4C, 'F','R','O','G','Y','S','U','E' ; "FROGYSUE"
|
|
.byte '@' ; time pad
|
|
.byte 0,8, $00,$00,$00,$00, 'T','H','A','N','K','S' ; "THANKS"
|
|
.byte 6,4, $00,$00,$00,$00, 'F','R','O','G','Y','S','U','E' ; "FROGYSUE"
|
|
|
|
|
|
.byte 0,10, $75,$5F,$F5,$57, 'A','@','V','M','W' ; "A VMW"
|
|
.byte 6,0, $75,$5F,$F5,$57, 'P','R','O','D','U','C','T','I','O','N'
|
|
; "PRODUCTION"
|
|
.byte 255 ; done
|
|
credits_text_end:
|
|
|
|
.assert >credits_text = >(credits_text_end-1), error, "credits_text crosses page"
|