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mon.c
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mon.c
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/* EXORcister simulator
* Copyright
* (C) 2011 Joseph H. Allen
*
* This 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 1, or (at your option) any later version.
*
* It 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 software; see the file COPYING. If not, write to the Free Software Foundation,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/poll.h>
#include <signal.h>
#include <unistd.h>
#include "utils.h"
#include "unasm6800.h"
#include "asm6800.h"
#include "sim6800.h"
#include "exor.h"
#include "exorterm.h"
FILE *mon_out;
FILE *mon_in;
int last;
unsigned short last_u;
int step;
struct cmd { char *name; int (*func)(char *); char *help; } cmds[];
void huh()
{
printf("Huh?\n");
}
extern FILE *lpt_file;
int quit_cmd(char *p)
{
printf("\nBye\n");
restore_termios();
if (lpt_file)
fclose(lpt_file);
exit(-1);
return 0;
}
int help_cmd(char *p)
{
int x;
for (x = 0; cmds[x].name; ++x)
fprintf(mon_out, "%s%s\n", cmds[x].name, cmds[x].help);
printf("Append >file to redirect output to file\n");
printf("Append >>file to append output to file\n");
printf("Append <file to redirect input from file\n");
return 0;
}
int caps_cmd(char *p)
{
if (match_word(&p, "on"))
lower = 0;
else if (match_word(&p, "off"))
lower = 1;
else
huh();
return 0;
}
int m_cmd(char *p)
{
int a;
if (parse_hex(&p, &a)) {
unsigned short addr;
if (a < 0 || a > 65535) {
printf("Invalid address\n");
return 0;
}
addr = a;
for (;;) {
char c;
unsigned char d;
printf("%4.4x %2.2x ", addr, mem[addr]);
fflush(stdout);
again:
d = 0;
if (read(fileno(stdin), &c, 1) < 0) {
putchar('\n');
break;
}
if (c == 'C' - '@') {
putchar('\n');
break;
} else if (c >= '0' && c <= '9') {
putchar(c);
fflush(stdout);
d = ((c - '0') << 4);
} else if (c >= 'a' && c <= 'f') {
putchar(c);
fflush(stdout);
d = ((c - 'a' + 10) << 4);
} else if (c >= 'A' && c <= 'F') {
putchar(c);
fflush(stdout);
d = ((c - 'A' + 10) << 4);
} else if (c == 8 || c == 127) {
putchar('\n');
--addr;
continue;
} else {
putchar('\n');
++addr;
continue;
}
if (read(fileno(stdin), &c, 1) < 0) {
putchar('\n');
break;
}
if (c == 'C' - '@') {
putchar(8);
putchar(32);
putchar('\n');
break;
} else if (c >= '0' && c <= '9') {
putchar(c);
fflush(stdout);
d += (c - '0');
} else if (c >= 'a' && c <= 'f') {
putchar(c);
fflush(stdout);
d += (c - 'a' + 10);
} else if (c >= 'A' && c <= 'F') {
putchar(c);
fflush(stdout);
d += (c - 'A' + 10);
} else if (c == 8 || c == 127) {
putchar(8);
putchar(32);
putchar(8);
fflush(stdout);
goto again;
} else {
putchar(8);
putchar(32);
putchar('\n');
++addr;
continue;
}
mem[addr++] = d;
putchar('\n');
}
} else
huh();
return 0;
}
int regs_cmd(char *p)
{
int val;
if (!*p) {
#ifdef M6809
fprintf(mon_out, "PC=%4.4X A=%2.2X B=%2.2X X=%4.4X Y=%4.4X U=%4.4X SP=%2.2X DP=%2.2X CC=%2.2X\n", pc, acca, accb, ix, iy, up, sp, dp, read_flags());
#endif
#ifdef M6800
fprintf(mon_out, "PC=%4.4X A=%2.2X B=%2.2X X=%4.4X SP=%2.2X CC=%2.2X\n", pc, acca, accb, ix, sp, read_flags());
#endif
} else if (match_word(&p, "pc") && parse_hex(&p, &val)) {
pc = val;
} else if (match_word(&p, "sp") && parse_hex(&p, &val)) {
sp = val;
} else if (match_word(&p, "x") && parse_hex(&p, &val)) {
ix = val;
#ifdef M6809
} else if (match_word(&p, "y") && parse_hex(&p, &val)) {
iy = val;
} else if (match_word(&p, "u") && parse_hex(&p, &val)) {
up = val;
} else if (match_word(&p, "dp") && parse_hex(&p, &val)) {
dp = val;
#endif
} else if (match_word(&p, "a") && parse_hex(&p, &val)) {
acca = val;
} else if (match_word(&p, "b") && parse_hex(&p, &val)) {
accb = val;
} else if (match_word(&p, "cc") && parse_hex(&p, &val)) {
write_flags(val);
} else
huh();
return 0;
}
int call_cmd(char *p)
{
int val;
if (parse_hex(&p, &val)) {
pc = val;
sp_stop = sp;
printf("Continuing until return when SP=%4.4x\n", sp);
stop = 0;
} else
huh();
return 1;
}
int c_cmd(char *p)
{
int val;
if (!*p) {
stop = 0;
return 1;
} else if (parse_hex(&p, &val)) {
stop = 0;
pc = val;
return 1;
} else
huh();
return 0;
}
int s_cmd(char *p)
{
int val;
if (!*p) {
stop = 1;
step = 1;
return 1;
} else if (parse_hex(&p, &val)) {
stop = 1;
step = 1;
pc = val;
return 1;
} else
huh();
return 0;
}
int clr_cmd(char *p)
{
clr_syms();
return 0;
}
int sy_cmd(char *p)
{
show_syms(mon_out);
#ifdef M6809
printf("setdp value is %2.2x\n", pseudo_dp);
#endif
return 0;
}
int b_cmd(char *p)
{
int val;
if (!*p) {
mybrk = 0;
printf("Breakpoint cleared\n");
} else if (parse_hex(&p, &val)) {
brk_addr = val;
mybrk = 1;
printf("Breakpoint set at %4.4X\n", brk_addr);
} else
huh();
return 0;
}
int d_cmd(char *p)
{
int val;
int len;
if (!*p) {
hd(mon_out, mem, last, 0x80);
last += 0x80;
} else if (parse_hex(&p, &val) && skipws(&p)) {
len = 0x80;
parse_hex(&p, &len);
hd(mon_out, mem, last = val, len);
last += len;
} else
huh();
return 0;
}
int p_cmd(char *p)
{
int start;
int len;
int addr = 0;
if (parse_hex(&p, &start) && skipws(&p) && parse_hex(&p, &len)) {
int l;
int cksum;
while (len) {
int x;
cksum = 0;
if (len >= 16)
l = 16;
else
l = len;
cksum = l + 3;
cksum += (start >> 8);
cksum += (start & 0xFF);
fprintf(mon_out, "S1%2.2X%4.4X", l + 3, start);
for (x = 0; x != l; ++x) {
fprintf(mon_out,"%2.2X", mem[start + x]);
cksum += mem[start + x];
}
fprintf(mon_out, "%2.2X\n", (~cksum & 0xFF));
len -= l;
start += l;
}
/* End mark, starting address */
skipws(&p);
parse_hex(&p, &addr);
l = 0;
cksum = l + 3;
cksum += (addr >> 8);
cksum += (addr & 0xFF);
fprintf(mon_out, "S9%2.2X%4.4X%2.2X\n", l + 3, addr, (~cksum & 0xFF));
}
return 0;
}
int l_cmd(char *p)
{
char name[100];
char buf[180];
FILE *f = 0;
int err = 0;
int count = 0;
int line = 0;
if (parse_word(&p, name))
{
f = fopen(name, "r");
if (!f) {
printf("Couldn't open %s\n", name);
return 0;
}
}
while (f ? !!fgets(buf, sizeof(buf), f) : !jgetline(mon_in, buf)) {
++line;
if (buf[0] == 'S' && buf[1] == '1') {
int l;
int addr;
int x;
int data;
int cksum;
int chk;
p = buf + 2;
parse_hex2(&p, &l);
chk = l;
parse_hex4(&p, &addr);
chk += (addr >> 8);
chk += (addr & 0xFF);
for (x = 0; x < l - 3; ++x) {
parse_hex2(&p, &data);
chk += data;
mem[addr + x] = data;
++count;
}
parse_hex2(&p, &cksum);
if (cksum != (~chk & 0xFF)) {
printf("Checksum mismatch on line %d\n", line);
err = 1;
}
} else if (buf[0] == 'S' && buf[1] == '9') {
int l;
int addr;
int cksum;
int chk;
p = buf + 2;
parse_hex2(&p, &l);
chk = l;
parse_hex4(&p, &addr);
chk += (addr >> 8);
chk += (addr & 0xFF);
parse_hex2(&p, &cksum);
if (cksum != (~chk & 0xFF)) {
printf("Checksum mismatch on line %d\n", line);
err = 1;
}
pc = addr;
printf("PC set to %4.4x\n", addr);
break;
} else {
printf("Unknown record on line %d\n", line);
break;
}
}
if (f)
fclose(f);
printf("%d bytes loaded\n", count);
if (err) {
printf("There were checksum errors during the load.\n");
} else {
printf("No checksum errors.\n");
}
return 0;
}
int a_cmd(char *p)
{
int addr;
char buf[180];
if (parse_hex(&p, &addr)) {
for (;;) {
fprintf(mon_out, "%4.4x: ", addr);
if (!jgetline(mon_in, buf)) {
if (mon_in != stdin) {
fprintf(mon_out, "%s\n", buf);
}
if (buf[0]) {
addr = assemble(mem, addr, buf);
} else {
break;
}
} else {
fprintf(mon_out, "\n");
break;
}
}
} else
huh();
return 0;
}
int u_cmd(char *p)
{
char buf[180];
int iaddr = last_u;
if (parse_hex(&p, &iaddr) || !*p) {
int target;
int x;
unsigned short addr = (unsigned short)iaddr;
for (x = 0; x != 22; ++x) {
unasm_line(mem, &addr, buf, &target, 1);
fprintf(mon_out, "%s\n", buf);
}
last_u = addr;
} else
huh();
return 0;
}
int abort_cmd(char *p)
{
abrt = 1;
stop = 0;
return 1;
}
int reset_cmd(char *p)
{
reset = 1;
stop = 0;
return 1;
}
int dump_cmd(char *p)
{
char name[180];
int start = 0;
int size = 65536;
int fd;
strcpy(name, "dump");
if (parse_word(&p, name) && skipws(&p))
{
if (parse_hex(&p, &start) && skipws(&p))
{
parse_hex(&p, &size);
}
}
if (!size || start + size > 65536) {
printf("start + size > 64K or size == 0\n");
return 0;
}
fd = creat(name, 0666);
if (fd != -1) {
write(fd, mem + start, size);
close(fd);
printf("Wrote %d bytes starting at %d to file '%s'\n", size, start, name);
} else {
printf("Couldn't open file '%s'\n", name);
}
return 0;
}
int read_cmd(char *p)
{
char name[180];
int start = 0;
int size;
FILE *f;
strcpy(name, "dump");
if (parse_word(&p, name) && skipws(&p))
parse_hex(&p, &start);
f = fopen(name, "r");
if (!f) {
printf("Couldn't open '%s'\n", name);
return 0;
}
fseek(f, 0, SEEK_END);
size = ftell(f);
if (!size || start + size > 65536) {
printf("start + size > 64K or size == 0\n");
fclose(f);
return 0;
}
rewind(f);
fread(mem + start, size, 1, f);
fclose(f);
printf("Loaded %d bytes starting at %d\n", size, start);
return 0;
}
int lpt_cmd(char *p)
{
char name[180];
if (lpt_file)
{
fclose(lpt_file);
lpt_file = 0;
}
if (parse_word(&p, name))
{
lpt_file = fopen(name, "w");
if (lpt_file)
fprintf(stderr, "Line printer file %s opened\n", name);
else
fprintf(stderr, "Couldn't open %s\n", name);
}
return 0;
}
int drive0_cmd(char *p)
{
char name[180];
if (parse_word(&p, name))
{
close_drive(0);
set_drive(0, strdup(name));
load_drive(0);
}
else
{
show_drive(0);
}
return 0;
}
int drive1_cmd(char *p)
{
char name[180];
if (parse_word(&p, name))
{
close_drive(1);
set_drive(1, strdup(name));
load_drive(1);
}
else
{
show_drive(1);
}
return 0;
}
int drive2_cmd(char *p)
{
char name[180];
if (parse_word(&p, name))
{
close_drive(2);
set_drive(2, strdup(name));
load_drive(2);
}
else
{
show_drive(2);
}
return 0;
}
int drive3_cmd(char *p)
{
char name[180];
if (parse_word(&p, name))
{
close_drive(3);
set_drive(3, strdup(name));
load_drive(3);
}
else
{
show_drive(3);
}
return 0;
}
int t_cmd(char *p)
{
if (match_word(&p, "on"))
trace = 1;
else if (match_word(&p, "off"))
trace = 0;
else
huh();
return 0;
}
int bt_cmd(char *p)
{
show_traces(128);
return 0;
}
int poll_cmd(char *p)
{
if (match_word(&p, "on"))
polling = 1;
else if (match_word(&p, "off"))
polling = 0;
else
huh();
return 0;
}
int cd_cmd(char *p)
{
if (!*p)
p = getenv("HOME");
if (chdir(p))
printf("Error changing directory\n");
else
system("/bin/pwd");
return 0;
}
int pwd_cmd(char *p)
{
system("/bin/pwd");
return 0;
}
int ls_cmd(char *p)
{
char buf[180];
sprintf(buf, "/bin/ls %s", p);
system(buf);
return 0;
}
/* Command table */
struct cmd cmds[]=
{
{ "help", help_cmd, " Show this help text" },
{ "h", help_cmd, " Show this help text" },
{ "q", quit_cmd, " Exit simulator" },
{ "quit", quit_cmd, " Exit simulator" },
{ "t", t_cmd, " [on|off] Turn tracing on / off" },
{ "bt", bt_cmd, " Show most recent 128 instructions" },
{ "poll", poll_cmd, " [on|off] Turn ACIA polling on / off" },
{ "c", c_cmd, " [hhhh] Continue simulating [jump to address]" },
{ "s", s_cmd, " [hhhh] Step one instruction [jump to address]" },
{ "b", b_cmd, " [hhhh] Set/Clear breakpoint" },
{ "r", regs_cmd, " [reg hhhh] Show regs, set reg" },
{ "x", call_cmd, " hhhh Call subroutine, return to monitor when done" },
{ "reset", reset_cmd, " Hit reset button" },
{ "abort", abort_cmd, " Hit abort button" },
{ "caps", caps_cmd, " [on|off] Force uppercase on / off" },
{ "d", d_cmd, " hhhh [nnnn] Hex dump" },
{ "m", m_cmd, " hhhh Modify" },
{ "a", a_cmd, " hhhh Assemble" },
{ "clr", clr_cmd, " Clear symbol table" },
{ "sy", sy_cmd, " Show symbol table" },
{ "u", u_cmd, " hhhh Unassemble" },
{ "p", p_cmd, " hhhh nnnn [ssss] Punch nn bytes starting at hh in S19 format (ss is PC in S9)" },
{ "l", l_cmd, " [file] Load S19 from file or stdin" },
{ "save", dump_cmd, " [file [hhhh [nnnn]]] Save nn bytes of memory starting at hh to file in binary\n" },
{ "read", read_cmd, " [file [hhhh]] Read binary file into memory starting at hh\n" },
{ "lpt", lpt_cmd, " [file] Open line printer file\n" },
{ "drive0", drive0_cmd, " [file] Change disk in drive 0\n" },
{ "drive1", drive1_cmd, " [file] Change disk in drive 1\n" },
{ "drive2", drive2_cmd, " [file] Change disk in drive 2\n" },
{ "drive3", drive3_cmd, " [file] Change disk in drive 3\n" },
{ "cd", cd_cmd, " path Change directory\n" },
{ "pwd", pwd_cmd, " Print current directory\n" },
{ "ls", ls_cmd, " [ls-args] Print directory\n" },
{ 0, 0, 0 }
};
void monitor()
{
/* Flush any remaining terminal output */
update();
if (mon_out != stdout) {
fclose(mon_out);
mon_out = stdout;
}
if (mon_in != stdin) {
fclose(mon_in);
mon_in = stdin;
}
/* system("stty -isig"); */
nosig_termios();
if (step) {
if (trace)
show_traces(1);
else
show_traces(2);
step = 0;
} else {
if (trace)
show_traces(1);
else
show_traces(2);
}
#ifdef M6809
printf("\n6809 Monitor: Ctrl-C to exit, 'c' to continue, or type 'help'\n");
#else
printf("\n6800 Monitor: Ctrl-C to exit, 'c' to continue, or type 'help'\n");
#endif
for (;;) {
char buf[180];
char word[180];
char *p = buf;
char *q;
fputs("% ", stdout);
if (jgetline(stdin, buf)) {
quit_cmd(p);
}
if ((p = strstr(buf, " >>")) && parse_word(((q = p + 3), &q), word)) {
/* Append output */
jstrcpy(p, q);
mon_out = fopen(word, "a");
if (!mon_out) {
printf("Couldn't open '%s' for append\n", word);
continue;
}
} else if ((p = strstr(buf, " >")) && parse_word(((q = p + 2), &q), word)) {
/* Redirect output */
jstrcpy(p, q);
mon_out = fopen(word, "w");
if (!mon_out) {
printf("Couldn't open '%s' for write\n", word);
continue;
}
}
if ((p = strstr(buf, " <")) && parse_word(((q = p + 2), &q), word)) {
/* Redirect input */
jstrcpy(p, q);
mon_in = fopen(word, "r");
if (!mon_in) {
printf("Couldn't open '%s' for reading\n", word);
if (mon_out != stdout) {
fclose(mon_out);
mon_out = stdout;
}
continue;
}
}
p = buf;
if (skipws(&p) && *p) {
int x;
for (x = 0; cmds[x].name; ++x)
if (match_word(&p, cmds[x].name))
break;
if (cmds[x].name) {
skipws(&p);
if (cmds[x].func(p))
break;
} else
printf("Huh?\n");
}
if (mon_out != stdout) {
fclose(mon_out);
mon_out = stdout;
}
if (mon_in != stdin) {
fclose(mon_in);
mon_in = stdin;
}
}
/* system("stty isig"); */
sig_termios();
izexorterm();
}