mirror of
https://github.com/deater/dos33fsprogs.git
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fancy_lores: loads at least. now to figre out vapor lock
This commit is contained in:
Vince Weaver
parent
dd5fe8623c
commit
51dd5e9a25
@ -1,25 +0,0 @@
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include ../Makefile.inc
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all: png_to_40x96 katahdin_40_96.inc
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katahdin_40_96.inc: png_to_40x96 katahdin_40_96.png
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./png_to_40x96 asm katahdin_40_96.png katahdin > katahdin_40_96.inc
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loadpng.o: loadpng.c
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$(CC) $(CFLAGS) -c loadpng.c
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png_to_40x96: png_to_40x96.o
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$(CC) $(LFLAGS) -lpng -o png_to_40x96 png_to_40x96.o
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png_to_40x96.o: png_to_40x96.c
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$(CC) $(CFLAGS) -c png_to_40x96.c
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install:
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cp png_to_40x96 $(INSTALL_LOC)
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clean:
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rm -f *~ *.o *.inc png_to_40x96
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37
fancy_lores/Makefile
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37
fancy_lores/Makefile
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@ -0,0 +1,37 @@
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include ../Makefile.inc
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DOS33 = ../dos33fs-utils/dos33
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all: fancy_lores_viewer.dsk png_to_40x96 katahdin_40_96.inc
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fancy_lores_viewer.dsk: DISP4096
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$(DOS33) -y fancy_lores_viewer.dsk BSAVE -a 0x1000 DISP4096
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DISP4096: disp4096.o
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ld65 -o DISP4096 disp4096.o -C ../linker_scripts/apple2_1000.inc
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disp4096.o: disp4096.s gr_copy.s \
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katahdin_40_96.inc
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ca65 -o disp4096.o disp4096.s -l disp4096.lst
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katahdin_40_96.inc: png_to_40x96 katahdin_40_96.png
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./png_to_40x96 asm katahdin_40_96.png katahdin > katahdin_40_96.inc
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loadpng.o: loadpng.c
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$(CC) $(CFLAGS) -c loadpng.c
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png_to_40x96: png_to_40x96.o
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$(CC) $(LFLAGS) -lpng -o png_to_40x96 png_to_40x96.o
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png_to_40x96.o: png_to_40x96.c
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$(CC) $(CFLAGS) -c png_to_40x96.c
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install:
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cp png_to_40x96 $(INSTALL_LOC)
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clean:
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rm -f *~ *.o *.lst *.inc png_to_40x96 DISP4096
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Before Width: | Height: | Size: 16 KiB After Width: | Height: | Size: 16 KiB |
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Before Width: | Height: | Size: 15 KiB After Width: | Height: | Size: 15 KiB |
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Before Width: | Height: | Size: 11 KiB After Width: | Height: | Size: 11 KiB |
351
fancy_lores/disp4096.s
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351
fancy_lores/disp4096.s
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@ -0,0 +1,351 @@
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; Display a 40x96 lo-res image
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; Uses the 40x96 page1/page2 every-2-scanline pageflip mode
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; as shown in my kfest18 hackfest demo
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; by deater (Vince Weaver) <vince@deater.net>
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; Zero Page
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FRAMEBUFFER = $00 ; $00 - $0F
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YPOS = $10
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YPOS_SIN = $11
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CH = $24
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CV = $25
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GBASL = $26
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GBASH = $27
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BASL = $28
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BASH = $29
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FRAME = $60
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BLARGH = $69
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DRAW_PAGE = $EE
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LASTKEY = $F1
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PADDLE_STATUS = $F2
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TEMP = $FA
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; Soft Switches
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KEYPRESS= $C000
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KEYRESET= $C010
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SET_GR = $C050 ; Enable graphics
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FULLGR = $C052 ; Full screen, no text
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PAGE0 = $C054 ; Page0
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PAGE1 = $C055 ; Page1
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LORES = $C056 ; Enable LORES graphics
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PADDLE_BUTTON0 = $C061
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PADDL0 = $C064
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PTRIG = $C070
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; ROM routines
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TEXT = $FB36 ;; Set text mode
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HOME = $FC58 ;; Clear the text screen
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WAIT = $FCA8 ;; delay 1/2(26+27A+5A^2) us
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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 #0
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sta DRAW_PAGE
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; Clear Page0
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lda #$00
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sta DRAW_PAGE
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jsr clear_gr
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; draw border line
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; lda #$55
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; ldy #38
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; jsr hline
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; Clear Page1
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lda #$4
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sta DRAW_PAGE
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lda #$0
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jsr clear_gr
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;==================
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; Draw Blue Border on screen
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;==================
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; F -> 7 -> 6 -> 2
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; lda #$0
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; sta DRAW_PAGE
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; lda #$6f
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; ldy #0
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; jsr hline
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; lda #$72
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; ldy #38
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; jsr hline
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; lda #$4
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; sta DRAW_PAGE
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; lda #$27
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; ldy #0
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; jsr hline
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; lda #$f6
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; ldy #38
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; jsr hline
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;=============================
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; Load graphic page0
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lda #$0c
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sta BASH
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lda #$00
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sta BASL ; load image to page0 $400
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lda #>(katahdin_low)
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sta GBASH
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lda #<(katahdin_low)
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sta GBASL
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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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bit LORES ; 4
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bit SET_GR ; 4
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bit FULLGR ; 4
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jsr wait_until_keypressed
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;=============================
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; Load graphic page1
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lda #$0c
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sta BASH
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lda #$00
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sta BASL ; load image to page0 $400
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lda #>(katahdin_high)
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sta GBASH
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lda #<(katahdin_high)
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sta GBASL
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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
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; GR part
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bit PAGE1
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jsr wait_until_keypressed
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;=====================================================
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; attempt vapor lock
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; by reading the "floating bus" we can see most recently
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; written value of the display
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; we look for $55 (which is the grey line)
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;=====================================================
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; See:
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; Have an Apple Split by Bob Bishop
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; Softalk, October 1982
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; Challenges: each scan line scans 40 bytes.
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; The blanking happens at the *beginning*
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; So 65 bytes are scanned, starting at adress of the line - 25
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; the scan takes 8 cycles, look for 4 repeats of the value
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; to avoid false positive found if the horiz blanking is mirroring
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; the line (max 3 repeats in that case)
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vapor_lock_loop: ; first make sure we have all zeroes
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LDA #$00
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zxloop:
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LDX #$04
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wiloop:
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CMP $C051
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BNE zxloop
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DEX
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BNE wiloop
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LDA #$72 ; now look for our border color (4 times)
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zloop:
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LDX #$04
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qloop:
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CMP $C051
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BNE zloop
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DEX
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BNE qloop
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; found first line of low-res grey, need to kill time
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; until we can enter at top of screen
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; so we want roughly 10 lines * 4 = 40*65 = 2600+4550-65
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; +4550 - 65 (for the scanline we missed) = 7085 - 12 = 7073
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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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; want 7073
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; Try X=26 Y=52 cycles=7073
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lda #0 ; 2
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lda #0 ; 2
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ldy #52 ; 2
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loopA:
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ldx #26 ; 2
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loopB:
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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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; Display Loop
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;================================================
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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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; 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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; 2 + 48*( (4+2+25*(2+3)) + (4+2+23*(2+3)+4+5)) + 9)
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; 48*[(6+125)-1] + [(6+115+10)-1]
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display_loop:
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ldy #48 ; 2
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outer_loop:
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bit PAGE0 ; 4
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ldx #25 ; 130 cycles with PAGE0 ; 2
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page0_loop: ; delay 126+bit
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dex ; 2
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bne page0_loop ; 2/3
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bit PAGE1 ; 4
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ldx #23 ; 130 cycles with PAGE1 ; 2
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page1_loop: ; delay 115+(7 loop)+4 (bit)+4(extra)
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dex ; 2
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bne page1_loop ; 2/3
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nop ; 2
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lda DRAW_PAGE ; 3
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dey ; 2
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bne outer_loop ; 2/3
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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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; scroll_the_text should be 4550+1 -2 - 13 -13 = 4523
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; rasterbars should be 4550+1 -2 - 13 -18 = 4518
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; do_nothing should be 4550+1 -2 - 13 -19 = 4517
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jsr do_nothing ; 6
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jmp display_loop ; 3
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;=================================
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; do nothing
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;=================================
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; and take 4517-6 = 4511 cycles to do it
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do_nothing:
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; Try X=7 Y=110 cycles=4511
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ldy #110 ; 2
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loop1:
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ldx #7 ; 2
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loop2:
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dex ; 2
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bne loop2 ; 2nt/3
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dey ; 2
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bne loop1 ; 2nt/3
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rts ; 6
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;==================================
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; HLINE
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;==================================
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; Color in A
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; Y has which line
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hline:
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pha ; 3
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ldx gr_offsets,y ; 4+
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stx hline_loop+1 ; 4
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lda gr_offsets+1,y ; 4+
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clc ; 2
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adc DRAW_PAGE ; 3
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sta hline_loop+2 ; 4
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pla ; 4
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ldx #39 ; 2
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hline_loop:
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sta $5d0,X ; 38 ; 5
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dex ; 2
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bpl hline_loop ; 2nt/3
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rts ; 6
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;==========================
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; Clear gr screen
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;==========================
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; Color in A
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clear_gr:
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ldy #46
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clear_page_loop:
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jsr hline
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dey
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dey
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bpl clear_page_loop
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rts
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gr_offsets:
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.word $400,$480,$500,$580,$600,$680,$700,$780
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.word $428,$4a8,$528,$5a8,$628,$6a8,$728,$7a8
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.word $450,$4d0,$550,$5d0,$650,$6d0,$750,$7d0
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.include "../asm_routines/gr_unrle.s"
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.include "../asm_routines/keypress.s"
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.include "gr_copy.s"
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.include "katahdin_40_96.inc"
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BIN
fancy_lores/fancy_lores_viewer.dsk
Normal file
BIN
fancy_lores/fancy_lores_viewer.dsk
Normal file
Binary file not shown.
59
fancy_lores/gr_copy.s
Normal file
59
fancy_lores/gr_copy.s
Normal file
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;=========================================================
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; gr_copy_to_current, 40x48 version
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;=========================================================
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; copy 0xc00 to DRAW_PAGE
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;
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; 45 + 2 + 120*(8*9 + 5) -1 + 6 = 9292
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gr_copy_to_current:
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lda DRAW_PAGE ; 3
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clc ; 2
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adc #$4 ; 2
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sta gr_copy_line+5 ; 4
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sta gr_copy_line+11 ; 4
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adc #$1 ; 2
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sta gr_copy_line+17 ; 4
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sta gr_copy_line+23 ; 4
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adc #$1 ; 2
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sta gr_copy_line+29 ; 4
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sta gr_copy_line+35 ; 4
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adc #$1 ; 2
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sta gr_copy_line+41 ; 4
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sta gr_copy_line+47 ; 4
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;===========
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; 45
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ldy #119 ; for early ones, copy 120 bytes ; 2
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gr_copy_line:
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lda $C00,Y ; load a byte (self modified) ; 4
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sta $400,Y ; store a byte (self modified) ; 5
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lda $C80,Y ; load a byte (self modified) ; 4
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sta $480,Y ; store a byte (self modified) ; 5
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lda $D00,Y ; load a byte (self modified) ; 4
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sta $500,Y ; store a byte (self modified) ; 5
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lda $D80,Y ; load a byte (self modified) ; 4
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sta $580,Y ; store a byte (self modified) ; 5
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lda $E00,Y ; load a byte (self modified) ; 4
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sta $600,Y ; store a byte (self modified) ; 5
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lda $E80,Y ; load a byte (self modified) ; 4
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sta $680,Y ; store a byte (self modified) ; 5
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lda $F00,Y ; load a byte (self modified) ; 4
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sta $700,Y ; store a byte (self modified) ; 5
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lda $F80,Y ; load a byte (self modified) ; 4
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sta $780,Y ; store a byte (self modified) ; 5
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dey ; decrement pointer ; 2
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bpl gr_copy_line ; ; 2nt/3
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rts ; 6
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|
Before Width: | Height: | Size: 23 KiB After Width: | Height: | Size: 23 KiB |
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Before Width: | Height: | Size: 22 KiB After Width: | Height: | Size: 22 KiB |
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Before Width: | Height: | Size: 133 KiB After Width: | Height: | Size: 133 KiB |
@ -103,7 +103,7 @@ int loadpng(char *filename, unsigned char **image_ptr, int *xsize, int *ysize,
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width = png_get_image_width(png_ptr, info_ptr);
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height = png_get_image_height(png_ptr, info_ptr);
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*xsize=width;
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*ysize=height;
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*ysize=height/2;
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color_type = png_get_color_type(png_ptr, info_ptr);
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bit_depth = png_get_bit_depth(png_ptr, info_ptr);
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@ -137,7 +137,7 @@ int loadpng(char *filename, unsigned char **image_ptr, int *xsize, int *ysize,
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out_ptr=image;
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if (color_type==PNG_COLOR_TYPE_RGB_ALPHA) {
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for(y=0;y<height;y+=2) {
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for(y=high;y<height;y+=4) {
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for(x=0;x<width;x++) {
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/* top color */
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@ -151,9 +151,9 @@ int loadpng(char *filename, unsigned char **image_ptr, int *xsize, int *ysize,
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a2_color=convert_color(color);
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/* bottom color */
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color= (row_pointers[y+1][x*4]<<16)+
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(row_pointers[y+1][x*4+1]<<8)+
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(row_pointers[y+1][x*4+2]);
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color= (row_pointers[y+2][x*4]<<16)+
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(row_pointers[y+2][x*4+1]<<8)+
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(row_pointers[y+2][x*4+2]);
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if (debug) {
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printf("%x ",color);
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}
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@ -167,14 +167,14 @@ int loadpng(char *filename, unsigned char **image_ptr, int *xsize, int *ysize,
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}
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}
|
||||
else if (color_type==PNG_COLOR_TYPE_PALETTE) {
|
||||
for(y=0;y<height;y+=2) {
|
||||
for(y=high;y<height;y+=4) {
|
||||
for(x=0;x<width;x++) {
|
||||
|
||||
/* top color */
|
||||
a2_color=row_pointers[y][x];
|
||||
|
||||
/* bottom color */
|
||||
color=row_pointers[y+1][x];
|
||||
color=row_pointers[y+2][x];
|
||||
|
||||
a2_color|=(color<<4);
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user