688 lines
11 KiB
ArmAsm
688 lines
11 KiB
ArmAsm
;
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; Cycle-counting text/hgr/lowres demo
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; by Vince Weaver
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;
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.include "zp.inc"
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.include "hardware.inc"
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FRAME = $60
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TREE1X = $61
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TREE2X = $62
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LETTERL = $63
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LETTERH = $64
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LETTERX = $65
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LETTERY = $66
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LETTERD = $67
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LETTER = $68
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BLARGH = $69
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MBASE = $97
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MBOFFSET = $98
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WAITING = $99
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;MB_VALUE = $91
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;DONE_PLAYING = $92
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MB_ADDRL = $93
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MB_ADDRH = $94
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MB_CHUNK_OFFSET = $95
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MB_DETECTED = $96
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WHICH_CHUNK = $97
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STATE = $98
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;===================
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; init screen
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jsr TEXT
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jsr HOME
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;==================
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; Init vars
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lda #28
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sta TREE1X
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lda #37
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sta TREE2X
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lda #0
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sta MBOFFSET
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lda #>music
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sta MBASE
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lda #<letters
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sta LETTERL
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lda #>letters
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sta LETTERH
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lda #39
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sta LETTERX
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lda #1
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sta LETTERY
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lda #15
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sta LETTERD
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lda #0
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sta DISP_PAGE
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lda #0
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sta DRAW_PAGE
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;==========================
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; setup mockingboard
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jsr mockingboard_detect_slot4
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stx MB_DETECTED
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ldx MB_DETECTED
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beq no_init_mb
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jsr mockingboard_init
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no_init_mb:
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;==========================
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; Load the background image
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lda #<katahdin
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sta getsrc_smc+1
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lda #>katahdin
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sta getsrc_smc+2
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lda #$20 ; Destination is HGR page0
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jsr decompress_lzsa2_fast
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; Wait
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; jsr wait_until_keypressed
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; GR part
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bit LORES
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bit SET_GR
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bit FULLGR
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; jsr draw_bottom_green ; 6
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; Wait
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; jsr wait_until_keypressed
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; bit HIRES
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; Wait
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; jsr wait_until_keypressed
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;=====================================================
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; attempt vapor lock
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;=====================================================
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jsr vapor_lock
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;==========================
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; setup text screen
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; clear top 6 lines to space
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; takes (Y/2)*(6+435+7)+5 = ?
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lda #$A0 ; space ; 2
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ldy #10 ; 6 lines ; 2
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jsr clear_page_loop ; 2693
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; 1 2
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; 0123456789abcdef0123456789abcdef0123456
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;line1:.asciiz " * . " $400
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;line2:.asciiz " * . . " $480
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;line3:.asciiz " * " $500
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;line4:.asciiz " * " $580
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;line5:.asciiz " . . . " $600
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;line6:.asciiz " . " $680
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lda #'.'|$80 ; print star ; 2
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sta $420 ; 4
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sta $487 ; 4
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sta $4A4 ; 4
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sta $601 ; 4
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sta $61c ; 4
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sta $621 ; 4
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sta $68d ; 4
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;============
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; 30
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; draw the moon
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lda #' ' ; print inv space ; 2
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sta $403 ; 4
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sta $482 ; 4
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sta $502 ; 4
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sta $583 ; 4
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;============
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; 18
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; vapor lock returns with us at beginning of hsync in line
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; 114 (7410 cycles), so with 5070 cycles to go
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; 5070+4550 = 9620
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; -2745 (draw text)
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; ===========
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; 6875
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; Try X=97 Y=14 cycles=6875
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ldy #14 ; 2
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loopA: ldx #97 ; 2
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loopB: dex ; 2
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bne loopB ; 2nt/3
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dey ; 2
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bne loopA ; 2nt/3
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jmp display_loop
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.align $100
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;=====================================================
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;=====================================================
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; Loop forever display loop
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;=====================================================
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;=====================================================
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display_loop:
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; each scan line 65 cycles
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; 1 cycle each byte (40cycles) + 25 for horizontal
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; Total of 12480 cycles to draw screen
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; Vertical blank = 4550 cycles (70 scan lines)
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; Total of 17030 cycles to get back to where was
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; 16666 = 17030 x=1021.8
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; 1000 x
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; TODO: find beginning of scan
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; Text mode for 6*8=48 scanlines (3120 cycles)
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; hgr for 64 scalines (4160 cycles)
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; gr for 80 scalines (5200 cycles)
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; vblank = 4550 cycles
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; text
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bit SET_TEXT ; 4
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;================
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; clear bottom green
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jsr draw_bottom_green ; 2209+6
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;================
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; Draw Small Tree
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lda #>small_tree ; 2
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sta INH ; 3
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lda #<small_tree ; 2
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sta INL ; 3
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lda TREE1X ; 3
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sta XPOS ; 3
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lda #28 ; 2
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sta YPOS ; 3
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jsr put_sprite ; 6
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;=========
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; 27
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; + 576
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;========
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; 603
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; want 3120
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; green -2215
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; tree1 -603
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; set_test -4
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;=============== 298 cycles
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; Try X=1 Y=27 cycles=298
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ldy #27 ; 2
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loop2:
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ldx #1 ; 2
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loop1:
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dex ; 2
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bne loop1 ; 2nt/3
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dey ; 2
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bne loop2 ; 2nt/3
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;=============================================
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; hgr
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bit HIRES ; 4
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bit SET_GR ; 4
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;================
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; Draw Big Tree
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lda #>big_tree ; 2
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sta INH ; 3
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lda #<big_tree ; 2
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sta INL ; 3
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lda TREE2X ; 3
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sta XPOS ; 3
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lda #30 ; 2
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sta YPOS ; 3
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jsr put_sprite ; 6
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;=========
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; 27
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; + 1410
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;========
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; 1437
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lda FRAME ; 3
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and #$1f ; 2
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and #$10 ; 2
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beq bird_walking
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; 2
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lda #>bird_rider_stand_right ; 2
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sta INH ; 3
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lda #<bird_rider_stand_right ; 2
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sta INL ; 3
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jmp draw_bird ; 3
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bird_walking:
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; 3
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lda #>bird_rider_walk_right ; 2
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sta INH ; 3
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lda #<bird_rider_walk_right ; 2
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sta INL ; 3
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; must be 15
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lda #0 ; 2
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; Must add another 15 as sprite is different
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inc XPOS ; 5
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inc XPOS ; 5
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inc XPOS ; 5
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draw_bird:
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; 15 + 7
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lda #17 ; 2
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sta XPOS ; 3
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lda #30 ; 2
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sta YPOS ; 3
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jsr put_sprite ; 6
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;=========
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; 38
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; + 2190
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;========
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; 2228
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;==========================
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; Update frame = 13 cycles
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inc FRAME ; frame++ ; 5
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lda FRAME ; 3
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and #$3f ; roll over after 63 ; 2
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sta FRAME ; 3
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;===========
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; 13
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;===========================
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; Update tree1 = 21 cycles
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and #$3f ; if (frame%64==0) ; 2
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beq dec_tree1
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; 2
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; need to do 19-5 cycles of nonsense
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inc TREE1X ; 5
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dec TREE1X ; 5
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lda #0 ; 2
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lda #0 ; 2
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jmp done_tree1 ; 3
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dec_tree1:
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; 3
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dec TREE1X ; tree1_x-- ; 5
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lda TREE1X ; 3
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bmi tree1_neg
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; 2
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ldx TREE1X ; 3
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jmp done_tree1 ; 3
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tree1_neg:
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; incoming br 3
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ldx #37 ; 2
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stx TREE1X ; 3
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done_tree1:
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;===========================
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; Update tree2 = 24 cycles
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lda FRAME ; 3
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and #$f ; if (frame%16==0) ; 2
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beq dec_tree2
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; 2
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; need to do 19-5 cycles of nonsense
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inc TREE2X ; 5
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dec TREE2X ; 5
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lda #0 ; 2
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lda #0 ; 2
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jmp done_tree2 ; 3
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dec_tree2:
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; 3
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dec TREE2X ; tree2_x-- ; 5
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lda TREE2X ; 3
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bmi tree2_neg
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; 2
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ldx TREE2X ; 3
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jmp done_tree2 ; 3
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tree2_neg:
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; incoming br 3
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ldx #37 ; 2
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stx TREE2X ; 3
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done_tree2:
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; want 4160
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; Tree2 Sprite -1437
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; Sprite -2228
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; Frame Update -13
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; Tree1 Update -21
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; Tree2 Update -24
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; hgr bits -8
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; ====================== 429 cycles
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; Try X=13 Y=6 cycles=427 R2
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lda #0 ; 2
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ldy #6 ; 2
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loop3:
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ldx #13 ; 2
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loop4:
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dex ; 2
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bne loop4 ; 2nt/3
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dey ; 2
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bne loop3 ; 2nt/3
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;===========================================================================
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; gr
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bit LORES ; 4
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;=========================
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; play mockingboard
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; 11+ 84*5 + 10*4 + 21 = 492
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lda MBASE ; 3
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sta MB_ADDRH ; 3
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lda #0 ; 2
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sta MB_ADDRL ; 3
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;=============
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; 11
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ldx #0 ; 2
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ldy MBOFFSET ; 3
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lda (MB_ADDRL),Y ; 5
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sta MB_VALUE ; 3
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jsr write_ay_both ; 6+65
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;===============
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; 84
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clc ; 2
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lda #6 ; 2
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adc MB_ADDRH ; 3
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sta MB_ADDRH ; 3
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;==============
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; 10
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ldx #2
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ldy MBOFFSET
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lda (MB_ADDRL),Y
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sta MB_VALUE
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jsr write_ay_both
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clc
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lda #6
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adc MB_ADDRH
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sta MB_ADDRH
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ldx #3
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ldy MBOFFSET
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lda (MB_ADDRL),y
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sta MB_VALUE
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jsr write_ay_both
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clc
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lda #6
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adc MB_ADDRH
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sta MB_ADDRH
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ldx #8
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ldy MBOFFSET
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lda (MB_ADDRL),y
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sta MB_VALUE
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jsr write_ay_both
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clc
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lda #6
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adc MB_ADDRH
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sta MB_ADDRH
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ldx #9
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ldy MBOFFSET
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lda (MB_ADDRL),y
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sta MB_VALUE
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jsr write_ay_both
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;
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lda FRAME ; 3
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and #1 ; 2
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clc ; 2
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adc MBOFFSET ; 3
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sta MBOFFSET ; 3
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lda MBASE ; 3
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adc #0 ; 2
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sta MBASE ; 3
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;=============
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; 21
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; 2=2 not loop
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; 2+7+3= 12 = last page
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; 2+7+15=24 = loop
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cmp #>music+5 ; 2
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bne waste_7 ;
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; 2
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lda MBOFFSET ; 3
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cmp #16 ; 2
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bne waste_12 ;
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; 2
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lda #>music ; 2
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sta MBASE ; 3
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lda #0 ; 2
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sta MBOFFSET ; 3
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jmp not_ready_to_loop ; 3
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waste_7:
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lda #0 ; 2
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inc BLARGH ; 5
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waste_12:
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; 3
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lda #0 ; 2
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inc BLARGH ; 5
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inc BLARGH ; 5
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not_ready_to_loop:
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; lores want 5200
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; mockingboard -492
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; wrap -24
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; softswitch -4
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;===================
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; 4680 cycles
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; Try X=7 Y=114 cycles=4675 R5
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inc BLARGH ; 5
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; lda #0 ; 2
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; lda #0 ; 2
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; lda #0 ; 2
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; lda #0 ; 2
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ldy #114 ; 2
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loop5:
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ldx #7 ; 2
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loop6:
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dex ; 2
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bne loop6 ; 2nt/3
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dey ; 2
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bne loop5 ; 2nt/3
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;========================================================================
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; vertical blank
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; want 4550 cycles
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; Try X=13 Y=64 cycles=4545 R2
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;=========================================================================
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jsr move_letters ; 6+126
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; exit if keypressed
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lda KEYPRESS ; 4
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bmi credits_keypressed ; 3/2nt
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;============================================
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; 6
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; Blanking time: 4550
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; move_letters -132
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; JMP at end -3
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;========================4415 cycles
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; - 6
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; =======
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; 4409
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; Try X=14 Y=58 cycles=4409
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; Try X=24 Y=35 cycles=4411 R4
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; nop
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; nop
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ldy #58 ; 2
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loop7: ldx #14 ; 2
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loop8: dex ; 2
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bne loop8 ; 2nt/3
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dey ; 2
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bne loop7 ; 2nt/3
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jmp display_loop ; 3
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;===========================================================
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;===========================================================
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;===========================================================
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credits_keypressed:
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bit KEYRESET
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lda #0 ; LOAD_TITLE
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sta WHICH_LOAD
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rts
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;wait_until_keypressed:
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; lda KEYPRESS ; check if keypressed
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; bpl wait_until_keypressed ; if not, loop
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; bit KEYRESET
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; rts
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;====================================
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; Draw bottom green
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;====================================
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; using hlin 7127, optimized a bit but still awful
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; this one is much better
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; 2209 cycles
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draw_bottom_green:
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lda #$44 ; 2
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ldx #39 ; 2
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green_loop:
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sta $728,X ; 28 ; 5
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sta $7a8,X ; 30 ; 5
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sta $450,X ; 32 ; 5
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sta $4d0,X ; 34 ; 5
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sta $550,X ; 36 ; 5
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sta $5d0,X ; 38 ; 5
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sta $650,X ; 40 ; 5
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sta $6d0,X ; 42 ; 5
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sta $750,X ; 44 ; 5
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sta $7d0,X ; 46 ; 5
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dex ; 2
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bpl green_loop ; 2nt/3
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rts ; 6
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; 4 + (40*55) + 6 - 1
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.align $100
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letters:
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;.byte 1,15
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.byte "T A L B O T",128
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.byte 2,14,"F A N T A S Y",128
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.byte 3,16,"S E V E N",128
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.byte 1,15," ",128
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.byte 2,14," ",128
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.byte 3,16," ",128
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.byte 1,19,"BY",128
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.byte 3,14,"VINCE WEAVER",128
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.byte 1,19," ",128
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.byte 3,14," ",128
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.byte 1,16,"MUSIC BY",128
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.byte 3,12,"HIROKAZU TANAKA",128
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.byte 1,16," ",128
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.byte 3,12," ",128
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.byte 2,13,"CYCLE COUNTING",128
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.byte 3,16,"IS HARD!"
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.byte 255
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.include "vapor_lock.s"
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.include "delay_a.s"
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.include "gr_hline.s"
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.include "move_letters.s"
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.include "gr_putsprite.s"
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.include "mockingboard.s"
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;.include "../asm_routines/keypress.s"
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.align $100
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.include "credits_sprites.inc"
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.include "decompress_fast_v2.s"
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;.align $1000
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katahdin:
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.incbin "graphics_credits/KATC.lzsa"
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katahdin_end:
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.align $100
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music:
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.incbin "music/music.tfv"
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