1
0
mirror of https://frontier.innolan.net/github/AmigaExamples.git synced 2025-12-07 20:11:59 +00:00

Converted makeadf to be consistent with imagecon

This commit is contained in:
alpine9000
2016-03-01 15:29:46 +11:00
parent 661183a7f9
commit aa497292fb
6 changed files with 5 additions and 97 deletions

Binary file not shown.

View File

@ -1,64 +0,0 @@
/*
* http://eab.abime.net/showpost.php?p=895070&postcount=6
* Makes a disk image of 901120 (0xdc000) bytes.
* Calculates boot block checksum.
*/
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#define DISKSIZE (0xdc000)
uint8_t image[DISKSIZE];
static void boot_chksum(uint8_t *p)
{
uint32_t oldchk,chk=0;
int i;
memset(p+4,0,4);
for (i=0; i<1024; i+=4) {
oldchk = chk;
chk += ((uint32_t)p[i+0] << 24) | ((uint32_t)p[i+1] << 16) |
((uint32_t)p[i+2] << 8) | p[i+3];
if (chk < oldchk)
++chk; /* carry */
}
chk = ~chk;
p[4] = (uint8_t)((chk >> 24) & 0xff);
p[5] = (uint8_t)((chk >> 16) & 0xff);
p[6] = (uint8_t)((chk >> 8) & 0xff);
p[7] = (uint8_t)(chk & 0xff);
}
int main(int argc,char *argv[])
{
FILE *f;
int rc = 1;
size_t len;
if (argc == 2) {
if (f = fopen(argv[1],"rb")) {
len = fread(image,1,DISKSIZE,f);
if (len > 0) {
if (len < DISKSIZE)
memset(image+len,0,DISKSIZE-len);
boot_chksum(image);
fwrite(image,1,DISKSIZE,stdout);
rc = 0;
}
else
fprintf(stderr,"Image read error!\n");
}
else
fprintf(stderr,"Cannot open '%s'!\n",argv[0]);
}
else
fprintf(stderr,"Usage: %s <image data>\n",argv[0]);
return rc;
}

View File

@ -1,29 +0,0 @@
#! /usr/bin/env python
import sys
import struct
def splice_checksum(block, chksum):
return block[0:4] + struct.pack('>I', chksum) + block[8:]
def makeit(fn, ofn):
with open(fn, 'rb') as f: data = f.read()
data = data + '\0' * (1024 - len(data))
chksum = 0
for w in xrange(0, 1024, 4):
chksum += struct.unpack('>I', data[w:w+4])[0]
if chksum > 0xffffffff:
chksum = (chksum + 1) & 0xffffffff
chksum = (~chksum) & 0xffffffff
data2 = splice_checksum(data, chksum)
with open(ofn, 'wb') as f: f.write(data2)
if len(sys.argv) == 3:
makeit(sys.argv[1], sys.argv[2])
else:
sys.stderr.write('need two args\n')