mirror of
https://github.com/rdolbeau/NuBusFPGA.git
synced 2024-06-02 03:41:29 +00:00
84 lines
1.4 KiB
C
84 lines
1.4 KiB
C
// 00 00 10 0a 00 00 00 00 01 01 5a 93 2b c7 00 0f
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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struct dir {
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uint32_t oslt;
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uint32_t length;
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uint32_t crc;
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uint8_t one;
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uint8_t appleformat;
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uint8_t tp0;
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uint8_t tp1;
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uint8_t tp2;
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uint8_t tp3;
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uint8_t zero;
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uint8_t bytelane;
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};
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int main(int argc, char **argv) {
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struct dir data;
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struct stat buf;
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int fd;
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if (argc < 2) {
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fprintf(stderr, "no I/O file\n");
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exit(-1);
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}
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data.oslt = 0;
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data.length = 0;
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data.crc = 0;
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data.one = 1;
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data.appleformat = 1;
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data.tp0 = 0x5a;
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data.tp1 = 0x93;
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data.tp2 = 0x2b;
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data.tp3 = 0xc7;
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data.zero = 0;
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data.bytelane = 0x0F;
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if (stat(argv[1], &buf)) {
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fprintf(stderr, "stat: %d -> %s\n", errno, strerror(errno));
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exit(-2);
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}
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data.length = sizeof(data) + buf.st_size;
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printf("size is %u\n", data.length);
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//.long (\entry_type<<24) + ((\label-.) & 0xffffff)
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data.oslt = 0x00 << 24 | (-buf.st_size) & 0xFFFFFF;
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printf("entry is 0x%08x\n", data.oslt);
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data.length = __builtin_bswap32(data.length);
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data.oslt = __builtin_bswap32(data.oslt);
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if ((fd = open(argv[1], O_WRONLY | O_APPEND)) == -1) {
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fprintf(stderr, "open: %d -> %s\n", errno, strerror(errno));
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exit(-3);
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}
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write(fd, &data, sizeof(data));
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close(fd);
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return 0;
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}
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