dos33fsprogs/gr-sim/lz4d_verbose.c

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#include <stdio.h>
#include <string.h>
#include "6502_emulate.h"
#define MAX_INPUT 65536
static unsigned char input[MAX_INPUT];
#define src 0x0
#define dst 0x2
#define end 0x4
#define count 0x6
#define delta 0x8
#define A1L 0x3c
#define A1H 0x3d
#define A2L 0x3e
#define A2H 0x3f
#define A4L 0x42
#define A4H 0x43
static void getsrc(void) {
//getsrc:
a=ram[y_indirect(src,y)]; // lda (src), y
ram[src]++; //inc src
if (ram[src]!=0) goto done_getsrc; //bne +
ram[src+1]++; //inc src+1
done_getsrc: ;
printf("LOADED %02X%02X-1: %02X\n",ram[src+1],ram[src],a);
//+ rts
}
void buildcount(void) {
//buildcount:
x=1; // ldx #1
ram[count+1]=x; // stx count+1
cmp(0xf); // cmp #$0f
if (z==0) goto done_buildcount; // bne ++
minus_buildcount:
ram[count]=a; //- sta count
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printf("MBC ");
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getsrc(); //jsr getsrc
x=a; //tax
c=0; //clc
adc(ram[count]); //adc count
if (c==0) goto skip_buildcount; // bcc +
ram[count+1]++; //inc count+1
skip_buildcount:
x++; //+ inx
if (x==0) goto minus_buildcount; //beq -
done_buildcount: ; //++ rts
}
static void putdst(void) {
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// printf("PUTADDR=%04X\n",y_indirect(dst,y));
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// putdst:
ram[y_indirect(dst,y)]=a; // sta (dst), y
ram[dst]++; // inc dst
if (ram[dst]!=0) goto putdst_end; // bne +
ram[dst+1]++; // inc dst+1
putdst_end:;
//+ rts
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printf("\tPUT: %02X%02X-1,%02X = %02X\n",ram[dst+1],ram[dst],y,a);
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}
static void getput(void) {
// getput:
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printf("GP ");
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getsrc(); // jsr getsrc
putdst(); // ; fallthrough
}
static void docopy(void) {
// docopy:
docopy_label:
getput(); // jsr getput
x--; // dex
if (x!=0) goto docopy_label; // bne docopy
ram[count+1]--; // dec count+1
if (ram[count+1]!=0) goto docopy_label; //bne docopy
//rts
}
int main(int argc, char **argv) {
FILE *fff;
int size;
short orgoff,paksize,pakoff;
init_6502();
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fff=fopen("../mockingboard/outi.raw.lz4","r");
if (fff==NULL) {
fprintf(stderr,"Error opening!\n");
return -1;
}
size=fread(input,sizeof(unsigned char),MAX_INPUT,fff);
printf("Read %d bytes\n",size);
fclose(fff);
memcpy(&ram[0x2000],input,size);
//LZ4 data decompressor for Apple II
//Peter Ferrie (peter.ferrie@gmail.com)
//init = 0 ;set to 1 if you know the values
//hiunp = 0 ;unpacker entirely in high memory
//hipak = 0 ;packed data entirely in high memory (requires hiunp)
//oep = 0; //first unpacked byte to run, you must set this by yourself
orgoff = 0x8000; //offset of first unpacked byte, you must set this by yourself
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paksize = size-0xb-8;
// minus 4 for checksum at end
// not sure what other 4 is from?
// block checksum? though had that disabled?
//size of packed data, you must set this by yourself if hiunp=0
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pakoff = 0x200b; // 11 byte offset to data?
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//LCBANK2 = $c083
//MOVE = $fe2c
a=(pakoff&0xff); //lda #<pakoff ;packed data offset
ram[src]=a; //sta src
a=(pakoff+paksize)&0xff;//lda #<(pakoff+paksize) ;packed data size
ram[end]=a; // sta end
a=(pakoff>>8); //lda #>pakoff
ram[src+1]=a; //sta src+1
a=(pakoff+paksize)>>8; //lda #>(pakoff+paksize)
ram[end+1]=a; // sta end+1
a=(orgoff>>8); //lda #>orgoff ;original unpacked data offset
ram[dst+1]=a; //sta dst+1
a=(orgoff&0xff); //lda #<orgoff
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]);
printf("packed end : %02X%02X\n",ram[end+1],ram[end]);
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
// Should: check for magic number 04 22 4d 18
// FLG: 64 in our case (01=version, block.index=1, block.checksum=0
// size=0, checksum=1, reserved
// MAX Blocksize: 40 (64kB)
// HEADER CHECKSUM: a7
// BLOCK HEADER: 4 bytes (le) If highest bit set, uncompressed!
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//unpack: //;unpacker entrypoint
goto unpmain; // jmp unpmain
unpmain:
y=0; //ldy #0
parsetoken:
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printf("PT ");
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getsrc(); // jsr getsrc
pha(); // pha
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lsr(); // lsr
lsr(); // lsr
lsr(); // lsr
lsr(); // lsr
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if (a==0) goto copymatches; // beq copymatches
buildcount(); // jsr buildcount
x=a; // tax
docopy(); // jsr docopy
a=ram[src]; // lda src
cmp(ram[end]); // cmp end
a=ram[src+1]; // lda src+1
sbc(ram[end+1]); // sbc end+1
if (c) {
printf("Done!\n");
printf("src : %02X%02X\n",ram[src+1],ram[src]);
printf("packed end : %02X%02X\n",ram[end+1],ram[end]);
goto done; // bcs done
}
copymatches:
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printf("CM1 ");
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getsrc(); // jsr getsrc
ram[delta]=a; // sta delta
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printf("CM1 ");
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getsrc(); // jsr getsrc
ram[delta+1]=a; // sta delta+1
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printf("DELTA is %02X%02X\n",ram[delta+1],ram[delta]);
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pla(); // pla
a=a&0xf; // and #$0f
buildcount(); // jsr buildcount
c=0; // clc
adc(4); // adc #4
x=a; // tax
if (c==0) goto copy_skip; // bcc +
ram[count+1]++; // inc count+1
copy_skip:
a=ram[src+1]; //+ lda src+1
pha(); // pha
a=ram[src]; // lda src
pha(); // pha
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printf("SAVED SRC: %02X%02X\n",ram[src+1],ram[src]);
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
a=ram[dst]; // lda dst
sbc(ram[delta]); // sbc delta
ram[src]=a; // sta src
a=ram[dst+1]; // lda dst+1
sbc(ram[delta+1]); // sbc delta+1
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ram[src+1]=a; // sta src+1
printf("NEW SRC: %02X:%02X\n",ram[src+1],ram[src]);
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docopy(); // jsr docopy
pla(); // pla
ram[src]=a; // sta src
pla(); // pla
ram[src+1]=a; // sta src+1
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printf("RESTORED SRC: %02X%02X\n",ram[src+1],ram[src]);
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goto parsetoken; // jmp parsetoken
done:
pla(); // pla
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int out_size=(ram[dst+1]<<8)+ram[dst];
out_size-=0x8000;
printf("dest addr : %02X%02X\n",ram[dst+1],ram[dst]);
int i,j,addr,temp;
addr=0x8000;
printf("\n");
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for(i=0;i<256;i++) {
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if (i%16==0) printf("%04X: ",addr+i);
printf("%02X ",ram[addr+i]);
if (i%16==15) {
for(j=0;j<16;j++) {
temp=ram[((addr+i)&0xfff0)+j];
if ((temp<' ') || (temp>127)) printf(".");
else printf("%c",temp);
}
printf("\n");
}
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}
printf("\n");
// rts
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fff=fopen("out.out","w");
if (fff==NULL) {
fprintf(stderr,"Error opening!\n");
return -1;
}
printf("Out size=%d\n",out_size);
fwrite(&ram[0x8000],1,out_size,fff);
fclose(fff);
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return 0;
}