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/*
* printhex.c - Print a hex memory dump
*
* Copyright (C) 1998 Gero Kuhlmann <gero@gkminix.han.de>
*
* 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
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <dos.h>
#include <ctype.h>
#include "romcheck.h"
/*
* Some useful defines
*/
#define MAXLINES 16 /* number of lines to print on one screen */
#define LINESIZE 16 /* number of hex values per line */
/*
* Print one line of hex code
*/
static void printline(seg)
unsigned int seg;
{
static unsigned char buf[LINESIZE + 1];
int i;
/* Fill buffer from rom memory */
movedata(seg, 0, __get_ds(), buf, LINESIZE);
/* Print buffer in hex and convert it into a printable string */
printf("%04X0 ", seg);
for (i = 0; i < LINESIZE; i++) {
printf(" %02X", buf[i] & 0xff);
if (buf[i] > 0x7f || !isprint(buf[i] & 0xff))
buf[i] = '.';
}
buf[LINESIZE] = '\0';
printf(" %s\n", buf);
}
/*
* Print a rom area or the whole memory as a hex dump.
*/
void printhex(sip)
struct scaninfo *sip;
{
unsigned int memstart, memend;
unsigned int curpos, i;
int index;
char c;
/* Ask the user about which area to print */
printf("\n\n");
index = readint("Enter rom area number, 0 for whole memory",
0, sip->signum, 0);
if (index > 0) {
index--;
memstart = sip->sigsegs[index];
memend = sip->sigsegs[index] + sip->sigsize[index];
} else {
memstart = readhex("Enter start segment",
STARTSEG, ENDSEG - 1, STARTSEG);
memend = readhex("Enter end segment",
memstart + 1, ENDSEG, memstart + 1);
}
curpos = memstart;
/* Print one page of output and ask user what to do next */
while (TRUE) {
printf("\n\n");
for (i = curpos; i < (curpos + MAXLINES) && i < memend; i++)
printline(i);
printf("\nPress <q> to exit");
if (i < (memend - 1))
printf(", <space> or <e> to continue");
if (curpos > memstart)
printf(", <b> or <t> to go back");
do {
c = waitchar();
switch (c) {
case 'q':
putchar('\n');
return;
case 'b':
if (curpos > memstart) {
if ((curpos - memstart) < MAXLINES)
curpos = memstart;
else
curpos -= MAXLINES;
} else
c = '\0'; /* invalid command */
break;
case 't':
if (curpos > memstart)
curpos = memstart;
else
c = '\0'; /* invalid command */
break;
case ' ':
if (i < (memend - 1))
curpos = i;
else
c = '\0'; /* invalid command */
break;
case 'e':
if (i < (memend - 1)) {
if ((memend - memstart) < MAXLINES)
curpos = memstart;
else
curpos = memend - MAXLINES;
} else
c = '\0'; /* invalid command */
break;
default:
c = '\0'; /* invalid command */
break;
}
} while (!c);
}
}
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