mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-27 02:31:00 +00:00
chiptune: update krw decoder
This commit is contained in:
Vince Weaver
parent
8dcc5a39e6
commit
f3b7a21ce2
@ -390,73 +390,26 @@ new_song:
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jsr clear_bottoms ; clear bottom of page 0/1
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lda #>LZ4_BUFFER
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lda #>LZ4_BUFFER ; point to LZ4 data
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sta OUTH
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lda #<LZ4_BUFFER
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sta OUTL
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ldy #4 ; skip KRW at front
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ldy #3 ; skip KRW magic at front
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; print title
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lda #20 ; VTAB 20: HTAB from file
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jsr print_header_info
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; FIXME: optimize
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; Print Author
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lda #21 ; VTAB 21: HTAB from file
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jsr print_header_info
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lda #20
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sta CV
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lda (OUTL),Y
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sta CH
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; Print clock
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lda #23 ; VTAB 23: HTAB from file
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jsr print_header_info
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lda OUTL
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clc
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adc #5 ; point past header stuff
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sta OUTL
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lda OUTH
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adc #0
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sta OUTH
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jsr print_both_pages
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iny
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tya
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ldy #0
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clc
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adc OUTL
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sta OUTL
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lda OUTH
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adc #$0
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sta OUTH
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lda #21
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sta CV
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lda (OUTL),Y
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sta CH
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inc OUTL
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bne bloop2
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inc OUTH
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bloop2:
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jsr print_both_pages
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iny
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tya
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ldy #0
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clc
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adc OUTL
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sta OUTL
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lda OUTH
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adc #$0
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sta OUTH
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lda #23
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sta CV
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lda (OUTL),Y
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sta CH
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inc OUTL
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bne bloop3
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inc OUTH
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bloop3:
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jsr print_both_pages
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; Point LZ4 src at proper place
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ldy #0
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lda #>(LZ4_BUFFER+3)
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@ -472,12 +425,7 @@ bloop3:
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adc #0
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sta LZ4_SRC+1
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jsr next_subsong
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; should tail call
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rts
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; Fall through to next_subsong
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;=================
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; next sub-song
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@ -502,12 +450,53 @@ next_subsong:
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jsr lz4_decode ; decode
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; tail-call?
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rts
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;===================
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; print header info
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;===================
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; shortcut to print header info
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; a = VTAB
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print_header_info:
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sta CV
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iny ; adjust pointer
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tya
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ldy #0
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clc
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adc OUTL
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sta OUTL
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lda OUTH
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adc #$0
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sta OUTH
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lda (OUTL),Y ; get HTAB value
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sta CH
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inc OUTL ; increment 16-bits
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bne bloop22
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inc OUTH
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bloop22:
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jmp print_both_pages ; print, tail call
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;==========
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; filenames
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;==========
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krw_file:
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.asciiz "CHRISTMAS.KRW"
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.asciiz "CAMOUFLAGE.KRW"
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.asciiz "FIGHTING.KRW"
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.asciiz "UNIVERSE.KRW"
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.asciiz "INTRO2.KRW"
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.asciiz "TECHNO.KRW"
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@ -126,3 +126,12 @@ void lsr(void) {
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a=(temp_a&0xff);
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// printf("LSR A=%x\n",a);
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}
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unsigned char high(int value) {
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return (value>>8)&0xff;
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}
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unsigned char low(int value) {
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return (value&0xff);
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}
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@ -12,3 +12,7 @@ void cmp(int value);
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void pha(void);
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void pla(void);
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void lsr(void);
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unsigned char high(int value);
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unsigned char low(int value);
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@ -7,7 +7,7 @@ SDL_INCLUDE= `sdl-config --cflags`
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all: fade fixed_point rainbow sparkle starfield starfield_fixed kaleido \
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tfv mode7_demo text text_demo tfv_multiply rasterbars rasterbars_fixed \
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lz4d_verbose 6502_test
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lz4d_verbose 6502_test krw_decode
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#### Library
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@ -38,6 +38,14 @@ lz4d_verbose.o: lz4d_verbose.c demo_title.c
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####
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krw_decode: krw_decode.o 6502_emulate.o
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$(CC) $(LFLAGS) $(SDL_LIBS) -o krw_decode krw_decode.o 6502_emulate.o
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krw_decode.o: krw_decode.c demo_title.c
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$(CC) $(CFLAGS) -c krw_decode.c
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####
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fixed_point: fixed_point.o
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$(CC) $(LFLAGS) -o fixed_point fixed_point.o
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@ -231,6 +239,6 @@ clean:
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rm -f *~ *.o gr-sim rainbow sparkle starfield starfield_fixed kaleido \
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tfv text mode7_demo fade fixed_point tfv_multiply \
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rasterbars rasterbars_fixed lookup_tables text_demo \
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lz4d_verbose 6502_test
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lz4d_verbose 6502_test krw_decode
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368
gr-sim/krw_decode.c
Normal file
368
gr-sim/krw_decode.c
Normal file
@ -0,0 +1,368 @@
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#include <stdio.h>
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#include <string.h>
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#include "6502_emulate.h"
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#define MAX_INPUT 65536
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static unsigned char input[MAX_INPUT];
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#define LZ4_BUFFER 0x2000
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#define ORGOFFSET 0x6000
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#define src 0x0
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#define dst 0x2
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#define end 0x4
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#define count 0x6
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#define delta 0x8
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#define CH 0x24
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#define CV 0x25
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#define OUTL 0xFE
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#define OUTH 0xFF
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static void getsrc(void) {
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//getsrc:
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a=ram[y_indirect(src,y)]; // lda (src), y
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printf("LOAD %02X%02X: %02X\n",ram[src+1],ram[src],a);
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ram[src]++; //inc src
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if (ram[src]!=0) goto done_getsrc; //bne +
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ram[src+1]++; //inc src+1
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done_getsrc: ;
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//+ rts
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}
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void buildcount(void) {
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printf("\tBUILDCOUNT: A=0x%x\n",a);
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//buildcount:
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x=1; // ?? // ldx #1
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ram[count+1]=x; // ?? // stx count+1
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cmp(0xf); // if 15, more complicated // cmp #$0f
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if (z==0) goto done_buildcount; // otherwise A is count // bne ++
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buildcount_loop:
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ram[count]=a; //- sta count
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// printf("MBC ");
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getsrc(); //jsr getsrc
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printf("\tADDITIONAL BUILDCOUNT 0x%x, adding 0x%x\n",a,ram[count]);
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x=a; //tax
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c=0; //clc
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adc(ram[count]); //adc count
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printf("\tGOT 0x%x c=%d\n",a,c);
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if (c==0) goto skip_buildcount; // bcc +
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ram[count+1]++; //inc count+1
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skip_buildcount:
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printf("\tUPDATED COUNT %02X%02X\n",ram[count+1],a);
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x++; // check if x is 255 //+ inx
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if (x==0) goto buildcount_loop; // if so, add in next byte //beq -
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done_buildcount: ; //++ rts
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printf("\tBUILDCOUNT= %02X%02X r[c+1]=%02X r[c]=%02X a=%02X x=%02X\n",
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ram[count+1],a,ram[count+1],ram[count],a,x);
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}
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static void putdst(void) {
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// printf("PUTADDR=%04X\n",y_indirect(dst,y));
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// putdst:
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ram[y_indirect(dst,y)]=a; // sta (dst), y
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if (y!=0) printf("ERROR ERROR ERROR ERROR ERROR\n");
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printf("\t\tPUT: %02X%02X = %02X\n",ram[dst+1],ram[dst],a);
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ram[dst]++; // inc dst
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if (ram[dst]!=0) goto putdst_end; // bne +
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ram[dst+1]++; // inc dst+1
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putdst_end:;
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//+ rts
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}
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static void getput(void) {
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// getput:
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printf("GP ");
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getsrc(); // jsr getsrc
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putdst(); // ; fallthrough
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}
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// 202 -> 201 -> 100 -> 1FF
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// 201 -> 100 -> 1FF
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// 200 -> 2ff -> 2fe
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// 1ff -> 1fe
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static void docopy(void) {
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printf("\tDOCOPY ENTRY: %02X%02X\n",ram[count+1],x);
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// docopy:
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docopy_label:
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printf("\tDOCOPY %02X%02X: ",ram[count+1],x);
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getput(); // jsr getput
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x--; // dex
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if (x!=0) goto docopy_label; // bne docopy
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ram[count+1]--; // dec count+1
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if (ram[count+1]!=0) goto docopy_label; //bne docopy
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//rts
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}
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int lz4_decode(void) {
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FILE *fff;
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int size;
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short orgoff,paksize,pakoff;
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//LZ4 data decompressor for Apple II
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//Peter Ferrie (peter.ferrie@gmail.com)
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//init = 0 ;set to 1 if you know the values
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//hiunp = 0 ;unpacker entirely in high memory
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//hipak = 0 ;packed data entirely in high memory (requires hiunp)
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//oep = 0; //first unpacked byte to run, you must set this by yourself
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orgoff = ORGOFFSET; //offset of first unpacked byte, you must set this by yourself
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paksize = size-0xb-8;
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// minus 4 for checksum at end
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// not sure what other 4 is from?
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// block checksum? though had that disabled?
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//size of packed data, you must set this by yourself if hiunp=0
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pakoff = LZ4_BUFFER+11; // 11 byte offset to data?
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//LCBANK2 = $c083
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//MOVE = $fe2c
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a=(pakoff&0xff); //lda #<pakoff ;packed data offset
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ram[src]=a; //sta src
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a=(pakoff+paksize)&0xff;//lda #<(pakoff+paksize) ;packed data size
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ram[end]=a; // sta end
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a=(pakoff>>8); //lda #>pakoff
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ram[src+1]=a; //sta src+1
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a=(pakoff+paksize)>>8; //lda #>(pakoff+paksize)
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ram[end+1]=a; // sta end+1
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a=(orgoff>>8); //lda #>orgoff ;original unpacked data offset
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ram[dst+1]=a; //sta dst+1
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a=(orgoff&0xff); //lda #<orgoff
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ram[dst]=a; // sta dst
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printf("packed size: raw=%x, adj=%x\n",size,paksize);
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printf("packed addr: %02X%02X\n",ram[src+1],ram[src]);
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printf("packed end : %02X%02X\n",ram[end+1],ram[end]);
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printf("dest addr : %02X%02X\n",ram[dst+1],ram[dst]);
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// https://github.com/lz4/lz4/wiki/lz4_Frame_format.md
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// Should: check for magic number 04 22 4d 18
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// FLG: 64 in our case (01=version, block.index=1, block.checksum=0
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// size=0, checksum=1, reserved
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// MAX Blocksize: 40 (64kB)
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// HEADER CHECKSUM: a7
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// BLOCK HEADER: 4 bytes (le) If highest bit set, uncompressed!
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//unpack: //;unpacker entrypoint
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// goto unpmain; // jmp unpmain
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//unpack:
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y=0; // used for offset //ldy #0
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parsetoken:
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printf("LOAD TOKEN: ");
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getsrc(); // jsr getsrc
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// get token
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pha(); // save for later // pha
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lsr(); // num literals in top 4 // lsr
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lsr(); // lsr
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lsr(); // lsr
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lsr(); // lsr
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if (a==0) goto copymatches; // if zero, no literals // beq copymatches
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buildcount(); // otherwise, build the count // jsr buildcount
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x=a; // tax
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docopy(); // jsr docopy
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a=ram[src]; // lda src
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cmp(ram[end]); // cmp end
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a=ram[src+1]; // lda src+1
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sbc(ram[end+1]); // sbc end+1
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if (c) {
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printf("Done!\n");
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printf("src : %02X%02X\n",ram[src+1],ram[src]);
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printf("packed end : %02X%02X\n",ram[end+1],ram[end]);
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goto done; // bcs done
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}
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copymatches:
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printf("\tDELTAL ");
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getsrc(); // jsr getsrc
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ram[delta]=a; // sta delta
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printf("\tDELTAH ");
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getsrc(); // jsr getsrc
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ram[delta+1]=a; // sta delta+1
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printf("\tDELTA is %02X%02X\n",ram[delta+1],ram[delta]);
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pla(); // restore token // pla
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a=a&0xf; // get bottom 4 bits // and #$0f
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buildcount(); // jsr buildcount
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c=0; // clc
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adc(4); // adc #4
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x=a; // tax
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if (x==0) goto copy_skip; //BUGFIX // beq +
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if (c==0) goto copy_skip; // bcc +
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ram[count+1]++; // inc count+1
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copy_skip:
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a=ram[src+1]; //+ lda src+1
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pha(); // pha
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a=ram[src]; // lda src
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pha(); // pha
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printf("\tSAVED SRC: %02X%02X\n",ram[src+1],ram[src]);
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// printf("CALCULATING: DST %02X%02X - DELTA %02X%02X\n",ram[dst+1],ram[dst],ram[delta+1],ram[delta]);
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c=1; // sec
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a=ram[dst]; // lda dst
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sbc(ram[delta]); // sbc delta
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ram[src]=a; // sta src
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a=ram[dst+1]; // lda dst+1
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sbc(ram[delta+1]); // sbc delta+1
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ram[src+1]=a; // sta src+1
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printf("\tNEW SRC: %02X%02X\n",ram[src+1],ram[src]);
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docopy(); // jsr docopy
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pla(); // pla
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ram[src]=a; // sta src
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pla(); // pla
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ram[src+1]=a; // sta src+1
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printf("\tRESTORED SRC: %02X%02X\n",ram[src+1],ram[src]);
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goto parsetoken; // jmp parsetoken
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done:
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pla(); // pla
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int out_size=(ram[dst+1]<<8)+ram[dst];
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out_size-=ORGOFFSET;
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printf("dest addr : %02X%02X\n",ram[dst+1],ram[dst]);
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int i,j,addr,temp;
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addr=ORGOFFSET;
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printf("\n");
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for(i=0;i<256;i++) {
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if (i%16==0) printf("%04X: ",addr+i);
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printf("%02X ",ram[addr+i]);
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if (i%16==15) {
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for(j=0;j<16;j++) {
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temp=ram[((addr+i)&0xfff0)+j];
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if ((temp<' ') || (temp>127)) printf(".");
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else printf("%c",temp);
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}
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printf("\n");
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}
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}
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printf("\n");
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// rts
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fff=fopen("out.out","w");
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if (fff==NULL) {
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fprintf(stderr,"Error opening!\n");
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return -1;
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}
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printf("Out size=%d\n",out_size);
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fwrite(&ram[ORGOFFSET],1,out_size,fff);
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fclose(fff);
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return 0;
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}
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static void print_both_pages(void) {
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int i;
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for(i=0;i<ram[CH];i++) printf(" ");
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y=0;
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while(1) {
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a=ram[y_indirect(OUTL,y)];
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if (a==0) break;
|
||||
printf("%c",a);
|
||||
y++;
|
||||
}
|
||||
printf("\n");
|
||||
}
|
||||
|
||||
|
||||
static void print_header_info(void) {
|
||||
|
||||
ram[CV]=a;
|
||||
|
||||
y++;
|
||||
a=y;
|
||||
y=0;
|
||||
c=0;
|
||||
adc(ram[OUTL]);
|
||||
ram[OUTL]=a;
|
||||
a=ram[OUTH];
|
||||
adc(0);
|
||||
ram[OUTH]=a;
|
||||
|
||||
a=ram[y_indirect(OUTL,y)];
|
||||
ram[CH]=a;
|
||||
|
||||
ram[OUTL]++;
|
||||
if (ram[OUTL]==0) ram[OUTH]++;
|
||||
|
||||
print_both_pages();
|
||||
}
|
||||
|
||||
int main(int argc, char **argv) {
|
||||
|
||||
FILE *fff;
|
||||
int size;
|
||||
|
||||
init_6502();
|
||||
|
||||
if (argc<2) {
|
||||
fprintf(stderr,"\nUsage: %s filename\n\n",argv[0]);
|
||||
}
|
||||
|
||||
fff=fopen(argv[1],"r");
|
||||
if (fff==NULL) {
|
||||
fprintf(stderr,"Error opening %s!\n",argv[1]);
|
||||
return -1;
|
||||
}
|
||||
|
||||
size=fread(input,sizeof(unsigned char),MAX_INPUT,fff);
|
||||
printf("Read %d bytes\n",size);
|
||||
|
||||
fclose(fff);
|
||||
|
||||
memcpy(&ram[LZ4_BUFFER],input,size);
|
||||
|
||||
a=high(LZ4_BUFFER);
|
||||
ram[OUTH]=a;
|
||||
a=low(LZ4_BUFFER);
|
||||
ram[OUTL]=a;
|
||||
|
||||
y=3;
|
||||
|
||||
a=20;
|
||||
print_header_info();
|
||||
|
||||
a=21;
|
||||
print_header_info();
|
||||
printf("\n");
|
||||
|
||||
a=23;
|
||||
print_header_info();
|
||||
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user