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#include <stdio.h>
#include <stdlib.h>
/* extract DSCII text from rom image, print in human-readable form.
usage: ./dumptxt startaddr endaddr
addresses are hex.
$C0: copyright symbol (double-wide), we print as 'c)'
$C1 - $DA: alphabet (but J Q Z are bogus-looking)
$B0 - $BA: numbers
$8D - carriage return (and newline), we print as 'nl'
$A0 - space
$F0-$FF set the color mask, but only in text drawn by draw_title_text.
We print these as cN where N is the low nybble.
*/
#define ROM "defender.rom"
int main(int argc, char **argv) {
int i, start, end, needaddr = 1;
unsigned char buf[16384];
FILE *f = fopen(ROM, "rb");
if(argc != 3) {
fprintf(stderr, "Usage: %s startaddr endaddr\n give addresses in hex, e.g. %s b844 b86c\n", argv[0], argv[0]);
exit(1);
}
if(!f) {
perror(ROM);
exit(1);
}
fread(buf, 16384, 1, f);
start = (int)strtol(argv[1], 0, 16);
end = (int)strtol(argv[2], 0, 16);
if(start < 0x8000 || start >= 0xc000 || end < 0x8000 || end >= 0xc000) {
fprintf(stderr, "start/end addr(s) invalid or out of range, must be 8000-bfff\n");
exit(1);
}
fprintf(stderr, "dumping text from $%04x to $%04x\n", start, end);
for(i = start; i <= end; i++) {
unsigned char c = buf[i - 0x8000];
if(needaddr) {
printf("%04x: '", start);
needaddr = 0;
}
if(!c) {
putchar('\'');
putchar('\n');
needaddr = 1;
} else if(c >= 0xb0 && c <= 0xba) {
putchar(c - 0xb0 + '0');
} else if(c == 0xc0) {
putchar('c');
putchar(')');
} else if(c == 0xa0) {
putchar(' ');
} else if(c == 0x8d) {
putchar('n');
putchar('l');
} else if(c >= 0xc1 && c <= 0xda) {
putchar(c - 0xc1 + 'A');
} else if(c >= 0xf0) {
putchar('c');
if(c > 0xf9)
putchar(c - 0xfa + 'A');
else
putchar(c - 0xf0 + '0');
} else {
putchar('?');
}
}
if(!needaddr) {
putchar('\'');
putchar('\n');
fprintf(stderr, "last string not null-terminated!\n");
}
return 0;
}
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