mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-09-28 17:55:04 +00:00
302 lines
4.4 KiB
ArmAsm
302 lines
4.4 KiB
ArmAsm
; Transmission
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;
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; by deater (Vince Weaver) <vince@deater.net>
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.include "../zp.inc"
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.include "../hardware.inc"
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.include "../qload.inc"
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.include "../music.inc"
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mod7_table = $1c00
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div7_table = $1d00
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hposn_low = $1e00
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hposn_high = $1f00
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spheres_start:
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;=====================
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; initializations
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;=====================
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;===================
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; Load graphics
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;===================
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bit SET_GR
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bit FULLGR
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bit PAGE1
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bit LORES
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lda #0
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sta DISP_PAGE
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lda #4
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sta DRAW_PAGE
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;===================================
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; Clear top/bottom of page 0 and 1
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;===================================
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jsr clear_screens
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; load image offscreen $4000
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lda #<spheres_data
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sta zx_src_l+1
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lda #>spheres_data
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sta zx_src_h+1
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lda #$40
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jsr zx02_full_decomp
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;=================================
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; copy to both pages
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jsr gr_copy_to_current
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jsr page_flip
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jsr gr_copy_to_current
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;===================================
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; Play "transmission" audio
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;===================================
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; decompress audio to $6000
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lda #<transmission_data
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sta zx_src_l+1
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lda #>transmission_data
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sta zx_src_h+1
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lda #$60
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jsr zx02_full_decomp
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; play audio
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lda #$00
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sta BTC_L
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lda #$60
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sta BTC_H
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sei ; stop music
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jsr mute_ay_both
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ldx #11
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jsr play_audio
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jsr unmute_ay_both
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cli
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;=============================
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; wait a bit
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;=============================
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; "10 seconds to transmission"
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; do we wait 10s?
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lda #2
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jsr wait_seconds
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lda #0
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sta XMISSION_COUNT
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;==========================
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; transmit sword
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;==========================
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lda #<long_sword1
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sta BASE_SPRITEL
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lda #>long_sword1
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sta BASE_SPRITEH
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move_sword_loop:
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jsr gr_copy_to_current
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jsr draw_sword
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jsr page_flip
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lda #16
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jsr wait_ticks
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lda KEYPRESS
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bmi done_sword_loop
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inc XMISSION_COUNT
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lda XMISSION_COUNT
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cmp #60
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bne move_sword_loop
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done_sword_loop:
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bit KEYRESET
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spheres_loop:
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lda #72
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jsr wait_for_pattern
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bcc spheres_loop
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spheres_done:
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rts
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;==========================
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; draw skewed sword
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;==========================
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draw_sword:
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lda BASE_SPRITEL
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sta CURRENT_SPRITEL
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lda BASE_SPRITEH
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sta CURRENT_SPRITEH ; copy start for sprite
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ldx #0
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stx REFCOUNT
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lda #3
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sta COUNT
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sword_loop:
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lda gr_offsets,X
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clc
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adc COUNT
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sta GBASL
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lda gr_offsets+1,X
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clc
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adc DRAW_PAGE
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sta GBASH
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ldy #5
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sword_inner_loop:
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lda (CURRENT_SPRITEL),Y
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beq skip_pixel
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sta (GBASL),Y
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skip_pixel:
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;====================================
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dey
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bpl sword_inner_loop
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; handle reflections
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lda REFCOUNT
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lsr
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bcs pixel_odd
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tay
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lda reflect1_h,Y
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clc
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adc DRAW_PAGE
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sta REF1H
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lda reflect1_l,Y
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sta REF1L
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lda reflect2_h,Y
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clc
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adc DRAW_PAGE
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sta REF2H
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lda reflect2_l,Y
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sta REF2L
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ldy #3
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lda (CURRENT_SPRITEL),Y
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beq pixel_odd ; skip if black
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ldy #0
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sta (REF1L),Y
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sta (REF2L),Y
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pixel_odd:
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;============================
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inc REFCOUNT
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inc COUNT
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clc
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lda CURRENT_SPRITEL
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adc #6
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sta CURRENT_SPRITEL
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lda #0
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adc CURRENT_SPRITEH
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sta CURRENT_SPRITEH
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inx
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inx
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cpx #28
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bne sword_loop
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; move to next input line
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clc
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lda BASE_SPRITEL
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adc #6
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sta BASE_SPRITEL
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lda #0
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adc BASE_SPRITEH
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sta BASE_SPRITEH
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rts
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;==========
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; page_flip
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;==========
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page_flip:
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lda DRAW_PAGE ; 3
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beq page_flip_show_1 ; 2nt/3
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page_flip_show_0:
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; show page2, draw page1
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bit PAGE2 ; 4
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lda #0 ; 2
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sta DRAW_PAGE
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rts ; 6
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page_flip_show_1:
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; show page1, draw page2
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bit PAGE1 ; 4
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lda #4
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sta DRAW_PAGE
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rts
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reflect1_h:
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; 46,44,42,40,38,36,34
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.byte >$7d0,>$750,>$6d0,>$650,>$5d0,>$550,>$4d0
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; 39, 38, 37, 36, 36, 34, 33
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reflect1_l:
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.byte <$7d0+39,<$750+38,<$6d0+37,<$650+36,<$5d0+35,<$550+34,<$4d0+33
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reflect2_h:
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; 4,6,8,10,12,14,16
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.byte >$500,>$580,>$600,>$680,>$700,>$780,>$428
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reflect2_l:
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.byte <$500+32,<$580+31,<$600+30,<$680+29,<$700+28,<$780+27,<$428+26
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.include "../wait_keypress.s"
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; .include "../gr_pageflip.s"
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.include "../gr_copy.s"
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.include "../gr_offsets.s"
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.include "../audio.s"
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.include "../irq_wait.s"
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spheres_data:
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; .incbin "graphics/spheres.hgr.zx02"
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.incbin "graphics/spheres.gr.zx02"
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transmission_data:
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.incbin "audio/transmission.btc.zx02"
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.include "graphics/sword_sprite.inc"
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