mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-27 02:31:00 +00:00
708 lines
11 KiB
ArmAsm
708 lines
11 KiB
ArmAsm
;=====================================
|
|
; Rasterbars in Space
|
|
;=====================================
|
|
|
|
|
|
space_bars:
|
|
|
|
;===================
|
|
; init screen
|
|
|
|
;===================
|
|
; init vars
|
|
lda #15
|
|
sta XPOS
|
|
lda #38
|
|
sta YPOS
|
|
|
|
lda #0
|
|
sta FRAME
|
|
sta FRAMEH
|
|
|
|
;=============================
|
|
; Load graphic hgr
|
|
|
|
lda #<sb_background_hgr
|
|
sta LZ4_SRC
|
|
lda #>sb_background_hgr
|
|
sta LZ4_SRC+1
|
|
|
|
lda #<(sb_background_hgr_end-8) ; skip checksum at end
|
|
sta LZ4_END
|
|
lda #>(sb_background_hgr_end-8) ; skip checksum at end
|
|
sta LZ4_END+1
|
|
|
|
lda #<$2000
|
|
sta LZ4_DST
|
|
lda #>$2000
|
|
sta LZ4_DST+1
|
|
|
|
jsr lz4_decode
|
|
|
|
|
|
|
|
;==================
|
|
; setup framebuffer
|
|
|
|
lda #0
|
|
sta ZPOS
|
|
|
|
|
|
;=============================
|
|
; Load graphic page1 $800
|
|
|
|
lda #4
|
|
sta DRAW_PAGE
|
|
|
|
lda #$22
|
|
jsr clear_gr
|
|
|
|
|
|
|
|
|
|
;=============================
|
|
; Load graphic page2 $c00
|
|
|
|
|
|
lda #8
|
|
sta DRAW_PAGE
|
|
|
|
lda #$00
|
|
jsr clear_gr
|
|
|
|
|
|
lda #<score_text
|
|
sta OUTL
|
|
lda #>score_text
|
|
sta OUTH
|
|
|
|
jsr move_and_print
|
|
|
|
|
|
lda #0
|
|
sta DRAW_PAGE
|
|
|
|
; GR part
|
|
bit PAGE0
|
|
|
|
sei ; disable interrupt music
|
|
|
|
;==============================
|
|
; setup graphics for vapor lock
|
|
;==============================
|
|
|
|
jsr vapor_lock ; 6
|
|
|
|
; vapor lock returns with us at beginning of hsync in line
|
|
; 114 (7410 cycles), so with 5070 lines to go
|
|
|
|
; so we have 5070 + 4550 = 9620 to kill
|
|
|
|
jsr gr_copy_to_current ; 6+ 9292
|
|
|
|
; now we have 322 left
|
|
|
|
; GR part
|
|
bit LORES ; 4
|
|
bit SET_GR ; 4
|
|
bit FULLGR ; 4
|
|
|
|
; 322 - 12 = 310
|
|
; - 3 for jmp
|
|
; 307
|
|
|
|
; Try X=9 Y=6 cycles=307
|
|
|
|
ldy #6 ; 2
|
|
sbloopA:ldx #9 ; 2
|
|
sbloopB:dex ; 2
|
|
bne sbloopB ; 2nt/3
|
|
dey ; 2
|
|
bne sbloopA ; 2nt/3
|
|
|
|
jmp sb_begin_loop
|
|
.align $100
|
|
|
|
|
|
;================================================
|
|
; Spacebars 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
|
|
|
|
sb_begin_loop:
|
|
|
|
sb_display_loop:
|
|
|
|
|
|
; 1 2 3
|
|
;0123456789012345678901234567890123456789
|
|
;LEVEL: 6 LIVES: 2 SCORE: 01978 HI: 02018
|
|
|
|
; 0-7 = text mode
|
|
; 8-87 = hgr
|
|
; 88 - 168 = split
|
|
; 169 - 191 = gr
|
|
|
|
|
|
; 8 lines of text mode
|
|
|
|
|
|
ldy #8 ; 2
|
|
|
|
sb_text_loop:
|
|
bit SET_TEXT ; 4
|
|
lda #29 ; 2
|
|
jsr delay_a ; 25+29
|
|
|
|
dey ; 2
|
|
bne sb_text_loop ; 3
|
|
;================
|
|
; 65
|
|
|
|
|
|
; -1
|
|
|
|
|
|
sb_hgr_loop:
|
|
; delay 80*65 = 5200
|
|
; 2180
|
|
; -2
|
|
; +1
|
|
; -8
|
|
;=========================
|
|
; 3011
|
|
; -1038 play_music
|
|
;================================
|
|
; 1973
|
|
|
|
bit SET_GR ; 4
|
|
bit HIRES ; 4
|
|
|
|
|
|
|
|
; draw sprite at same time
|
|
lda #>ship_forward ; 2
|
|
sta INH ; 3
|
|
lda #<ship_forward ; 2
|
|
sta INL ; 3
|
|
jsr put_sprite ; 6
|
|
; + 2164
|
|
;===========
|
|
; 2180
|
|
|
|
|
|
jsr play_music ; 6+1032
|
|
|
|
; Try X=196 Y=2 cycles=1973
|
|
|
|
; Try X=59 Y=10 cycles=3011
|
|
|
|
ldy #2 ; 2
|
|
sbloopC:ldx #196 ; 2
|
|
sbloopD:dex ; 2
|
|
bne sbloopD ; 2nt/3
|
|
dey ; 2
|
|
bne sbloopC ; 2nt/3
|
|
|
|
|
|
|
|
|
|
sb_mixed:
|
|
lda $0 ;kill 6 cycles (room for rts) ; 2
|
|
ldx #9 ; 2
|
|
ldy #9 ; 14 ; 126 ; 2
|
|
|
|
sb_mixed_loop:
|
|
lda ss_multiples,x ; 4
|
|
sta split_smc+1 ; 4
|
|
split_smc:
|
|
jsr split_4 ; 6+46
|
|
dey ; 2
|
|
bne sb_mixed_loop ; 3
|
|
|
|
; -1
|
|
nop ; 2
|
|
ldy #9 ; 2
|
|
dex ; 2
|
|
bne split_smc ; 3
|
|
|
|
; -1
|
|
|
|
; need to kill
|
|
; -6 from offset
|
|
; +1 fall through
|
|
; -9 from check
|
|
; +1 from other fallthrough
|
|
;================
|
|
; -13
|
|
|
|
|
|
|
|
sb_all_gr:
|
|
; 23 lines of this
|
|
|
|
; 23 * 65 = 1495
|
|
; -4
|
|
; -13
|
|
; =========
|
|
; 1478
|
|
|
|
bit LORES ; 4
|
|
|
|
; Try X=41 Y=7 cycles=1478
|
|
|
|
ldy #7 ; 2
|
|
sbloopE:ldx #41 ; 2
|
|
sbloopF:dex ; 2
|
|
bne sbloopF ; 2nt/3
|
|
dey ; 2
|
|
bne sbloopE ; 2nt/3
|
|
|
|
|
|
|
|
;======================================================
|
|
; We have 4550 cycles in the vblank, use them wisely
|
|
;======================================================
|
|
|
|
; do_nothing should be 4550
|
|
; -3470 draw_framebuffer
|
|
; -533 setup framebuffer
|
|
; -21 frame count
|
|
; -16 auto-move
|
|
; -7 timeout
|
|
; -34 keypress
|
|
; -1 adjust center mark back
|
|
; ===========
|
|
; 468
|
|
|
|
|
|
|
|
;====================
|
|
; Auto-move ship
|
|
;====================
|
|
; look it up in lookup table?
|
|
|
|
lda FRAMEH ; 3
|
|
lsr ; 2
|
|
and #$1f ; 2
|
|
tax ; 2
|
|
lda sb_x_lookup,X ; 4
|
|
sta XPOS ; 3
|
|
;=======
|
|
; 16
|
|
|
|
;=====================
|
|
; timeout
|
|
;=====================
|
|
; 7 cycles
|
|
lda FRAMEH ; 3
|
|
cmp #100 ; 2
|
|
beq sb_exit ; 3
|
|
; -1
|
|
|
|
; Try X=11 Y=8 cycles=489 R2
|
|
; Try X=31 Y=3 cycles=484
|
|
; Try X=22 Y=4 cycles=465 R3
|
|
|
|
lda $0
|
|
|
|
ldy #4 ; 2
|
|
sbloop1:ldx #22 ; 2
|
|
sbloop2:dex ; 2
|
|
bne sbloop2 ; 2nt/3
|
|
dey ; 2
|
|
bne sbloop1 ; 2nt/3
|
|
|
|
jsr setup_framebuffer ; 6+527
|
|
|
|
jsr draw_framebuffer ; 6+3464
|
|
|
|
; Increment frame count
|
|
; noflo: 16 + 2 + (3) = 21
|
|
; oflo: 16 + 5 = 21
|
|
inc FRAME ; 5
|
|
lda FRAME ; 3
|
|
and #3 ; 15 Hz ; 2
|
|
sta FRAME ; 3
|
|
beq sb_frame_oflo ; 3
|
|
;============
|
|
; 16
|
|
; -1
|
|
lda $0 ; nop ; 3
|
|
jmp sb_frame_noflo ; 3
|
|
sb_frame_oflo:
|
|
inc FRAMEH ; 5
|
|
sb_frame_noflo:
|
|
|
|
|
|
; no keypress = 10+(24) = 34
|
|
; left pressed = 9+8+12+(5)= 34
|
|
; right pressed = 9+8+5+12 = 34
|
|
|
|
lda KEYPRESS ; 4
|
|
bpl sb_no_keypress ; 3
|
|
; -1
|
|
jmp sb_handle_keypress ; 3
|
|
sb_no_keypress:
|
|
inc $0 ; 5
|
|
dec $0 ; 5
|
|
inc $0 ; 5
|
|
dec $0 ; 5
|
|
nop ; 2
|
|
nop ; 2
|
|
|
|
jmp sb_display_loop ; 3
|
|
|
|
sb_handle_keypress:
|
|
bit KEYRESET ; clear keypress ; 4
|
|
cmp #'Q'|$80 ; 2
|
|
beq sb_exit ; 3
|
|
; -1
|
|
|
|
sb_check_left:
|
|
cmp #$08|$80 ; left ; 2
|
|
bne sb_check_right ; 3
|
|
; -1
|
|
dec XPOS ; 5
|
|
|
|
nop ; nop ; 2
|
|
lda $0 ; nop ; 3
|
|
jmp sb_display_loop ; 3
|
|
|
|
sb_check_right:
|
|
cmp #$15|$80 ; 2
|
|
bne sb_exit ; 3
|
|
; -1
|
|
inc XPOS ; 5
|
|
|
|
jmp sb_display_loop ; 3
|
|
|
|
sb_exit:
|
|
cli ; re-enable interrupt music
|
|
jmp blue_line
|
|
|
|
sb_real_exit:
|
|
bit KEYRESET
|
|
rts ; 6
|
|
|
|
|
|
.align $100
|
|
|
|
; total =
|
|
; 4 wide: = 53
|
|
; 12 wide: = 253
|
|
; 20 wide: = 421
|
|
; 28 wide: = 813
|
|
; 36 wide: = 757
|
|
; 40 wide: = 1161
|
|
; 6
|
|
;====================================
|
|
; 3464
|
|
draw_framebuffer:
|
|
|
|
|
|
; 2 + (4*(X*8)+5) -1 =
|
|
; 2 + 4*(8+5) -1 = 85
|
|
|
|
ldx #4 ; 2
|
|
fb4_loop:
|
|
lda FRAMEBUFFER+0 ; 3
|
|
sta $5a8+18-1,x ; 5
|
|
dex ; 2
|
|
bne fb4_loop ; 3
|
|
|
|
|
|
; 2 + (12*(X*8)+5) -1 =
|
|
; 2 + 12*(16+5) -1 = 253
|
|
|
|
ldx #12 ; 2
|
|
fb12_loop:
|
|
lda FRAMEBUFFER+1 ; 3
|
|
sta $628+14-1,x ; 5
|
|
lda FRAMEBUFFER+2 ; 3
|
|
sta $6a8+14-1,x ; 5
|
|
dex ; 2
|
|
bne fb12_loop ; 3
|
|
|
|
; 2 + (20*(X*8)+5) -1 =
|
|
; 2 + 20*(16+5) -1 = 421
|
|
|
|
ldx #20 ; 2
|
|
fb20_loop:
|
|
lda FRAMEBUFFER+3 ; 3
|
|
sta $728+10-1,x ; 5
|
|
lda FRAMEBUFFER+4 ; 3
|
|
sta $7a8+10-1,x ; 5
|
|
dex ; 2
|
|
bne fb20_loop ; 3
|
|
|
|
|
|
; 2 + (28*(X*8)+5) -1 =
|
|
; 2 + 28*(24+5) -1 = 813
|
|
|
|
ldx #28 ; 2
|
|
fb28_loop:
|
|
lda FRAMEBUFFER+5 ; 3
|
|
sta $450+6-1,x ; 5
|
|
lda FRAMEBUFFER+6 ; 3
|
|
sta $4d0+6-1,x ; 5
|
|
lda FRAMEBUFFER+7 ; 3
|
|
sta $550+6-1,x ; 5
|
|
dex ; 2
|
|
bne fb28_loop ; 3
|
|
|
|
|
|
; 2 + (36*(X*8)+5) -1 =
|
|
; 2 + 36*(16+5) -1 = 757
|
|
|
|
ldx #36 ; 2
|
|
fb36_loop:
|
|
lda FRAMEBUFFER+8 ; 3
|
|
sta $5d0+2-1,x ; 5
|
|
lda FRAMEBUFFER+9 ; 3
|
|
sta $650+2-1,x ; 5
|
|
dex ; 2
|
|
bne fb36_loop ; 3
|
|
|
|
; 2 + (40*(X*8)+5) -1 =
|
|
; 2 + 40*(24+5) + -1 = 1161
|
|
|
|
ldx #40 ; 2
|
|
fb40_loop:
|
|
lda FRAMEBUFFER+10 ; 3
|
|
sta $6d0-1,x ; 5
|
|
lda FRAMEBUFFER+11 ; 3
|
|
sta $750-1,x ; 5
|
|
lda FRAMEBUFFER+12 ; 3
|
|
sta $7d0-1,x ; 5
|
|
dex ; 2
|
|
bne fb40_loop ; 3
|
|
|
|
; -1
|
|
rts ; 6
|
|
|
|
|
|
|
|
;.align $100
|
|
;.include "screen_split.s"
|
|
;background_hgr:
|
|
;.incbin "SB_BACKGROUNDC.BIN.lz4",11
|
|
;background_hgr_end:
|
|
|
|
score_text:
|
|
.byte 0,0
|
|
.asciiz "LEVEL:6 LIVES:2 SCORE:001978 HI:002018"
|
|
|
|
|
|
|
|
; Note on the distance calculations
|
|
; we use something simplistic here
|
|
; see http://www.extentofthejam.com/pseudo/
|
|
|
|
; "Texture": 64?
|
|
; 0 GREY 5,7,f,7,5,0,0,0
|
|
; 1 0,0,0,0,0,0,0,0
|
|
; 2 BLUE 2,6,f,6,2,0,0,0
|
|
; 3 0,0,0,0,0,0,0,0
|
|
; 4 GREEN 4,c,f,c,4,0,0,0
|
|
; 5 0,0,0,0,0,0,0,0
|
|
; 6 RED 1,b,f,b,1,0,0,0
|
|
; 7 0,0,0,0,0,0,0,0
|
|
.align $100
|
|
;.align 64
|
|
raster_texture:
|
|
.byte $5,$7,$f,$7,$5,$0,$0,$0 ; grey
|
|
.byte $0,$0,$0,$0,$0,$0,$0,$0
|
|
.byte $2,$6,$f,$6,$2,$0,$0,$0 ; blue
|
|
.byte $0,$0,$0,$0,$0,$0,$0,$0
|
|
.byte $4,$c,$f,$c,$4,$0,$0,$0 ; green
|
|
.byte $0,$0,$0,$0,$0,$0,$0,$0
|
|
.byte $1,$b,$f,$b,$1,$0,$0,$0 ; red
|
|
.byte $0,$0,$0,$0,$0,$0,$0,$0,$0
|
|
|
|
offset_lookup:
|
|
|
|
; Linear
|
|
; .byte 26,24,22,20,18,16,14,12,10, 8, 6, 4, 2,0
|
|
|
|
.byte 29,24,20,16,13,10,8,6,4,3,2,1,0,0
|
|
|
|
sb_x_lookup:
|
|
.byte 15,14,13,12,11,10, 9, 8, 8, 9,10,11,12,13,14,15
|
|
.byte 15,16,17,18,19,20,21,22, 22,21,20,19,18,17,16,15
|
|
|
|
;.align $100
|
|
|
|
; 2 + 40*13 + 5 = 527
|
|
setup_framebuffer:
|
|
ldx #0 ; 2
|
|
setup_fb_loop:
|
|
lda offset_lookup,X ; 4
|
|
clc ; 2
|
|
adc FRAMEH ; 3
|
|
and #$3f ; 2
|
|
tay ; 2
|
|
lda raster_texture,y ; 4
|
|
asl ; 2
|
|
asl ; 2
|
|
asl ; 2
|
|
asl ; 2
|
|
;============
|
|
; 25
|
|
|
|
ora raster_texture+1,y ; 4
|
|
|
|
sta FRAMEBUFFER,x ; zp ; 4
|
|
inx ; 2
|
|
cpx #13 ; 2
|
|
bne setup_fb_loop ; 3
|
|
;===========
|
|
; 15
|
|
|
|
; -1
|
|
rts ; 6
|
|
|
|
|
|
|
|
|
|
blue_line:
|
|
bit PAGE0 ; set page 0
|
|
bit LORES ; Lo-res graphics
|
|
bit FULLGR
|
|
bit SET_GR ; set graphics
|
|
|
|
lda #0
|
|
sta DRAW_PAGE
|
|
jsr clear_all
|
|
; jsr clear_screens_notext ; clear top/bottom of page 0/1
|
|
|
|
blueline_loop:
|
|
|
|
;================
|
|
; draw the ship
|
|
;================
|
|
draw_ship_big:
|
|
jsr clear_all
|
|
|
|
lda #>ship_forward
|
|
sta INH
|
|
lda #<ship_forward
|
|
sta INL
|
|
|
|
lda #15
|
|
sta XPOS
|
|
lda #34
|
|
sta YPOS
|
|
jsr put_sprite
|
|
|
|
draw_ship_small:
|
|
jsr delay_1s
|
|
jsr clear_all
|
|
|
|
lda #>ship_small
|
|
sta INH
|
|
lda #<ship_small
|
|
sta INL
|
|
|
|
lda #17
|
|
sta XPOS
|
|
lda #30
|
|
sta YPOS
|
|
jsr put_sprite
|
|
|
|
draw_ship_tiny:
|
|
jsr delay_1s
|
|
jsr clear_all
|
|
|
|
lda #>ship_tiny
|
|
sta INH
|
|
lda #<ship_tiny
|
|
sta INL
|
|
|
|
lda #18
|
|
sta XPOS
|
|
lda #28
|
|
sta YPOS
|
|
jsr put_sprite
|
|
|
|
lda #18
|
|
sta SPEED
|
|
|
|
jsr delay_1s
|
|
|
|
draw_ship_line:
|
|
lda #2
|
|
jsr delay_custom
|
|
jsr clear_all
|
|
|
|
lda #COLOR_LIGHTBLUE
|
|
sta COLOR
|
|
|
|
clc
|
|
lda #20
|
|
adc SPEED
|
|
sta V2
|
|
|
|
sec
|
|
lda #20
|
|
sbc SPEED
|
|
tay
|
|
|
|
; 20 - 0 to 0 - 20, 20 - 40
|
|
|
|
lda #26
|
|
jsr hlin_double
|
|
|
|
dec SPEED
|
|
bne draw_ship_line
|
|
|
|
draw_ship_done:
|
|
lda #$77
|
|
sta clear_all_color+1
|
|
jsr clear_all
|
|
|
|
lda #2
|
|
jsr delay_custom
|
|
|
|
lda #$0
|
|
sta clear_all_color+1
|
|
jsr clear_all
|
|
|
|
jsr delay_1s
|
|
|
|
lda #40
|
|
jsr delay_custom
|
|
|
|
jmp sb_real_exit
|
|
|
|
;1s = 17030*60 = 1021800
|
|
|
|
|
|
delay_1s:
|
|
lda #20
|
|
delay_custom:
|
|
sta STATE
|
|
delay_1s_loop:
|
|
|
|
; 17030 - 1038 = 15992
|
|
|
|
; jsr play_music ; 6+1032
|
|
|
|
; Try X=113 Y=28 cycles=15989 R3
|
|
|
|
ldy #28 ; 2
|
|
sbloopU:ldx #113 ; 2
|
|
sbloopV:dex ; 2
|
|
bne sbloopV ; 2nt/3
|
|
dey ; 2
|
|
bne sbloopU ; 2nt/3
|
|
|
|
dec STATE
|
|
bne delay_1s_loop
|
|
|
|
rts
|