mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-18 21:06:31 +00:00
205 lines
3.4 KiB
ArmAsm
205 lines
3.4 KiB
ArmAsm
; Display a 40x48d lo-res image
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; Uses the 40x48d page1/page2 every-1-scanline pageflip mode
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; by deater (Vince Weaver) <vince@deater.net>
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end_book:
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; cli
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;===================
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; init screen
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bit PAGE0
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bit SET_TEXT
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lda #' '+$80
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sta clear_all_color+1
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jsr gr_clear_all
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;===================
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; init vars
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lda #0
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sta DRAW_PAGE
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lda #255
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sta FRAMEL
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;===================
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; setup graphics
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jsr create_update_type1
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;======================
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; print message
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lda #<read_book_text
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sta OUTL
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lda #>read_book_text
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sta OUTH
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jsr move_and_print
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jsr move_and_print
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; lda #200
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; jsr long_wait
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; lda #200
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; jsr long_wait
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; sei
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lda #0
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sta FRAME_PLAY_OFFSET
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sta FRAME_PLAY_PAGE
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sta FRAME_OFFSET
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sta FRAME_PAGE
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jsr update_pt3_play
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; setup 7 frames
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jsr pt3_write_lc_7
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;=============================
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; Load graphic page0
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lda #<book_low
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sta GBASL
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lda #>book_low
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sta GBASH
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lda #$c ; load image to $c00
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jsr load_rle_gr
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lda #4
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sta DRAW_PAGE
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jsr gr_copy_to_current ; copy to page1
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; GR part
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bit PAGE1
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bit LORES ; 4
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bit SET_GR ; 4
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bit FULLGR ; 4
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;=============================
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; Load graphic page1
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lda #<book_high
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sta GBASL
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lda #>book_high
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sta GBASH
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lda #$c ; load image to $c00
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jsr load_rle_gr
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lda #0
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sta DRAW_PAGE
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jsr gr_copy_to_current
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; GR part
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bit PAGE0
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;==============================
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; setup graphics for vapor lock
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;==============================
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jsr vapor_lock
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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 lines to go
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; GR part
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bit LORES ; 4
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bit SET_GR ; 4
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bit FULLGR ; 4
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jsr gr_copy_to_current ; 6+ 9292
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; now we have 322 left
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; 322 - 12 = 310
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; - 3 for jmp
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; 307
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; Try X=9 Y=6 cycles=307
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ldy #6 ; 2
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loopQ: ldx #9 ; 2
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loopR: dex ; 2
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bne loopR ; 2nt/3
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dey ; 2
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bne loopQ ; 2nt/3
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jmp book_loop ; 3
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.align $100
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;================================================
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; Display Loop
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;================================================
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; We want to alternate between page1 and page2 every 65 cycles
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; vblank = 4550 cycles to do scrolling
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book_loop:
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jsr $9800 ; cycle-counted page0/page1 flip code
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;======================================================
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; We have 4550 cycles in the vblank, use them wisely
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;======================================================
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; do_nothing should be
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; 4550
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; -12 -- enter/leave flip code
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; -10 -- keypress code
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; -1243
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; =======
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; 3285 cycles
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jsr play_frame_compressed ; 6+1237
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;=================================
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; do nothing
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;=================================
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; and take 3285
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book_do_nothing:
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; Try X=163 Y=4 cycles=3285
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ldy #4 ; 2
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bloop1:
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ldx #163 ; 2
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bloop2:
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dex ; 2
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bne bloop2 ; 2nt/3
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dey ; 2
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bne bloop1 ; 2nt/3
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lda FRAME_PLAY_PAGE ; 3
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nop
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cmp #2 ; 2 (decoding takes most of a page)
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bne book_loop ; 3
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; dec FRAMEL ; 5
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; nop ; 2
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; bne book_loop ; 3
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; lda TEMP ; 3
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; lda KEYPRESS ; 4
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; bpl book_loop ; 3
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rts ; 6
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read_book_text:
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.byte 2,11,"QUIET AT LAST",0
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.byte 2,12,"FINALLY I CAN READ MY BOOK IN PEACE",0
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