mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-01 01:06:33 +00:00
151 lines
2.0 KiB
ArmAsm
151 lines
2.0 KiB
ArmAsm
; Polar Bear
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; do the animated bounce if possible
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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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polar_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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load_loop:
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; already in hires when we come in?
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bit KEYRESET
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bit SET_GR
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bit HIRES
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bit FULLGR
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; bit PAGE1
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lda #0
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jsr hgr_page1_clearscreen
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jsr hgr_page2_clearscreen
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bit PAGE2 ; look at page2
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; load image offscreen $6000
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lda #<polar_data
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sta zx_src_l+1
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lda #>polar_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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;===============================
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;===============================
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;===============================
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; TODO
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; scroll in and bounce
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;===============================
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;===============================
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lda #0
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sta DRAW_PAGE ; draw to PAGE1
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lda #188
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sta SCROLL_START
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polar_outer_loop:
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lda SCROLL_START
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sta COUNT
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lda #0
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sta YDEST
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polar_scroll_loop:
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; setup source
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ldx COUNT
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lda hposn_low,X
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sta polar_load_smc+1
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lda hposn_high,X
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clc
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adc #$40 ; load from $6000
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sta polar_load_smc+2
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; setup destination
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ldx YDEST
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lda hposn_low,X
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sta polar_store_smc+1
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lda hposn_high,X
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clc
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adc DRAW_PAGE ; store to $2000/$4000
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sta polar_store_smc+2
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ldy #39
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polar_scroll_inner:
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polar_load_smc:
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lda $6000,Y
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polar_store_smc:
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sta $2000,Y
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dey
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bne polar_scroll_inner
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inc YDEST
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inc COUNT
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lda COUNT
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cmp #192
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bne polar_scroll_loop
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; flip pages
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jsr hgr_page_flip
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lda SCROLL_START
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beq done_polar_scroll
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sec
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sbc #4
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sta SCROLL_START
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jmp polar_outer_loop
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done_polar_scroll:
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polar_loop:
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lda #8
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jsr wait_seconds
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; lda #76
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; jsr wait_for_pattern
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; bcc polar_loop
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polar_done:
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rts
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.include "../wait_keypress.s"
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; .include "../zx02_optim.s"
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.include "../hgr_clear_screen.s"
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.include "../hgr_copy_fast.s"
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.include "../irq_wait.s"
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.include "../hgr_page_flip.s"
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polar_data:
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.incbin "graphics/polar2.hgr.zx02"
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