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/*
int2tap - Convert an Intel segment file to a loadable Spectrum tape file
Copyright (C) 2004 Ian Cowburn (ianc@noddybox.demon.co.uk)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-------------------------------------------------------------------------
*/
static const char id[]="$Id$";
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "intel.h"
static const char header_id[]=I2T_INTEL_H;
extern const char *progname;
/* ---------------------------------------- CONSTANTS
*/
#undef TRUE
#undef FALSE
#define TRUE 1
#define FALSE 0
/* ---------------------------------------- PRIVATE FUNCTIONS
*/
static const unsigned ToHex(char c)
{
if (c>='0' && c<='9')
{
return c-'0';
}
if (c>='A' && c<='F')
{
return c-'A'+10;
}
if (c>='a' && c<='f')
{
return c-'a'+10;
}
return 0;
}
/* ---------------------------------------- INTERFACES
*/
int IntelLoad(const char *filename,
unsigned char mem [0x1000],
IntelInfo *info)
{
FILE *fp;
char buff[1024];
int done;
int addr_read;
int ret;
if (!(fp=fopen(filename,"r")))
{
fprintf(stderr,"%s: Failed to open %s\n",progname,filename);
return FALSE;
}
addr_read=FALSE;
info->low=0xffff;
info->high=0x0000;
done=FALSE;
ret=FALSE;
while(!done)
{
if (!fgets(buff,sizeof buff,fp))
{
fprintf(stderr,"%s: Missing EOF record in %s\n",progname,filename);
done=TRUE;
}
if (!done && buff[0]!=':')
{
fprintf(stderr,"%s: Invalid Intel HEX file %s\n",progname,filename);
done=TRUE;
}
if (!done && buff[8]=='1')
{
done=TRUE;
ret=TRUE;
}
if (!done && (buff[8]=='2' || buff[8]=='3'))
{
fprintf(stderr,"%s: Extended address in Intel HEX file %s\n",
progname,filename);
done=TRUE;
}
if (!done)
{
unsigned addr;
unsigned len;
unsigned f;
len=ToHex(buff[1])<<4|ToHex(buff[2]);
addr=ToHex(buff[3])<<12|ToHex(buff[4])<<8|
ToHex(buff[5])<<4|ToHex(buff[6]);
if (!addr_read)
{
info->addr=addr;
addr_read=TRUE;
}
for(f=0;f<len && !done;f++)
{
unsigned char b;
if (addr<info->low)
{
info->low=addr;
}
if (addr>info->high)
{
info->high=addr;
}
b=ToHex(buff[f*2+9])<<4|ToHex(buff[f*2+10]);
mem[addr++]=b;
if (addr==0)
{
fprintf(stderr,"%s: Intel HEX file %s has "
"wrapped from 0xffff to 0x0000\n",
progname,filename);
done=TRUE;
}
}
}
}
if (info->low!=0xffff)
{
info->len=(info->high-info->low)+1;
}
fclose(fp);
return ret;
}
/* END OF FILE */
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