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unasm6809.c
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/* M6800 unassembler
* 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 "unasm6800.h"
#include "utils.h"
struct fact *swi_facts;
int targets[65536];
struct fact *facts[65536];
struct fact *mkfact(unsigned short addr, int type, int len, char *label, char *comment)
{
struct fact *f = (struct fact *)malloc(sizeof(struct fact));
f->next = 0;
f->addr = addr;
f->type = type;
f->len = len;
f->label = strdup(label);
f->comment = strdup(comment);
/* printf("Create fact addr=%x type=%d len=%d label=%s comment=%s\n",
addr, type, len, label, comment); */
return f;
}
/* Parse known facts */
void parse_facts(FILE *f)
{
char buf[100];
char *p;
int line = 0;
while (fgets(buf, sizeof(buf)-1, f)) {
if (buf[0] && buf[strlen(buf)-1]=='\n')
buf[strlen(buf)-1] = 0;
if (buf[0] && buf[strlen(buf)-1]=='\r')
buf[strlen(buf)-1] = 0;
p = buf;
int iaddr;
unsigned short addr;
char keyword[100];
int len;
char label[100];
char *comment = 0;
addr = 0;
keyword[0] = 0;
len = 0;
label[0] = 0;
++line;
if (parse_hex(&p, &iaddr) && skipws(&p)) {
addr = (unsigned short)iaddr;
if (parse_word(&p, keyword) && skipws(&p)) {
if (!strcmp(keyword, "code")) {
if (parse_word(&p, label) && skipws(&p)) {
comment = p;
facts[addr] = mkfact(addr, 0, 0, label, comment);
}
} else if (!strcmp(keyword, "subr")) {
if (parse_word(&p, label) && skipws(&p)) {
comment = p;
facts[addr] = mkfact(addr, 5, 0, label, comment);
}
} else {
if (parse_dec(&p, &len) && skipws(&p) &&
parse_word(&p, label) && skipws(&p)) {
comment = p;
if (!strcmp(keyword, "swi")) {
struct fact *f = mkfact(addr, 6, len, label, comment);
f->next = swi_facts;
swi_facts = f;
} else if (!strcmp(keyword, "fcb")) {
facts[addr] = mkfact(addr, 1, len, label, comment);
} else if (!strcmp(keyword, "fdb")) {
facts[addr] = mkfact(addr, 2, len, label, comment);
} else if (!strcmp(keyword, "fcc")) {
facts[addr] = mkfact(addr, 3, len, label, comment);
} else if (!strcmp(keyword, "rmb")) {
facts[addr] = mkfact(addr, 4, len, label, comment);
} else {
printf("%d: Unknown keyword '%s'\n", line, keyword);
}
} else {
printf("%d: Syntax error\n", line);
}
}
}
}
}
}
int fcb_line(unsigned char *mem, unsigned short *at_pc, char *outbuf, int flag)
{
char buf[256];
char buf1[256];
unsigned short pc = *at_pc;
struct fact *fact;
int flg = targets[pc];
sprintf(buf, "%4.4X: %2.2X ", pc, mem[pc]);
fact = facts[pc];
pc++;
if (fact) {
sprintf(buf1, "%-10s FCB $%2.2X", fact->label, mem[pc - 1]);
} else if (flg) {
sprintf(buf1, "L%4.4d FCB $%2.2X", flg, mem[pc - 1]);
} else {
sprintf(buf1, " FCB $%2.2X", mem[pc - 1]);
}
sprintf(outbuf, "%-15s%-9s",buf, buf1);
if (fact)
sprintf(outbuf + strlen(outbuf)," * %s", fact->comment);
*at_pc = pc;
return flg;
}
int rmb_line(unsigned char *mem, unsigned short *at_pc, char *outbuf, int flag, int len)
{
char buf[256];
char buf1[256];
unsigned short pc = *at_pc;
struct fact *fact;
int flg = targets[pc];
sprintf(buf, "%4.4X: %2.2X ", pc, mem[pc]);
fact = facts[pc];
pc += len;
if (fact) {
sprintf(buf1, "%-10s RMB %d", fact->label, len);
} else if (flg) {
sprintf(buf1, "L%4.4d RMB %d", flg, len);
} else {
sprintf(buf1, " RMB %d", len);
}
sprintf(outbuf, "%-15s%-9s",buf, buf1);
if (fact)
sprintf(outbuf + strlen(outbuf)," * %s", fact->comment);
*at_pc = pc;
return flg;
}
int fcc_line(unsigned char *mem, unsigned short *at_pc, char *outbuf, int flag, int len)
{
char buf[256];
char buf1[256];
unsigned short pc = *at_pc;
struct fact *fact;
int flg = targets[pc];
sprintf(buf, "%4.4X: %2.2X ", pc, mem[pc]);
fact = facts[pc];
pc += len;
if (fact) {
sprintf(buf1, "%-10s FCC %d", fact->label, len);
} else if (flg) {
sprintf(buf1, "L%4.4d FCC %d", flg, len);
} else {
sprintf(buf1, " FCC %d", len);
}
sprintf(outbuf, "%-15s%-9s",buf, buf1);
if (fact)
sprintf(outbuf + strlen(outbuf)," * %s", fact->comment);
*at_pc = pc;
return flg;
}
int fdb_line(unsigned char *mem, unsigned short *at_pc, char *outbuf, int flag)
{
char buf[256];
char buf1[256];
int pc = *at_pc;
struct fact *fact;
int flg = targets[pc];
sprintf(buf, "%4.4X: %2.2X %2.X", pc, mem[pc], mem[pc+1]);
fact = facts[pc];
pc += 2;
if (fact) {
sprintf(buf1, "%-10s FDB $%4.4X", fact->label, (((int)mem[pc - 2] << 8) + mem[pc -1]));
} else if (flg) {
sprintf(buf1, "L%4.4d FDB $%4.4X", flg, (((int)mem[pc - 2] << 8) + mem[pc -1]));
} else {
sprintf(buf1, " FDB $%4.4X", (((int)mem[pc - 2] << 8) + mem[pc -1]));
}
sprintf(outbuf, "%-15s%-9s",buf, buf1);
if (fact)
sprintf(outbuf + strlen(outbuf)," * %s", fact->comment);
*at_pc = pc;
return flg;
}
extern char *regname[];
int tfr_name(char **name, int r);
void show_list(int us, char *right, unsigned char cb);
int unasm_ind(unsigned char *mem, unsigned short *pc, char *buf, char *right)
{
unsigned char i = mem[*pc]; /* Fetch index byte */
unsigned char ind = (i & 0x10); /* Indirection bit */
unsigned char o = (i & 0x0f); /* Index type / low bits of 5-bit offset */
int r = (3 & (i >> 5)); /* Index register number */
sprintf(buf + strlen(buf), " %2.2X", i);
*pc = *pc + 1;
if (!(i & 0x80))
{ /* 5-bit signed offset */
if (ind) {
int v = -16 + o;
sprintf(right, "%d,%s", v, regname[r]);
return 0;
} else {
sprintf(right, "%d,%s", o, regname[r]);
return 0;
}
}
else
{
switch (o)
{
case 0x00: /* ,R+ */
{
if (ind)
sprintf(right, "[,%s+]", regname[r]);
else
sprintf(right, ",%s+", regname[r]);
return 0;
}
case 0x01: /* ,R++ */
{
if (ind)
sprintf(right, "[,%s+]+", regname[r]);
else
sprintf(right, ",%s++", regname[r]);
return 0;
}
case 0x02: /* ,-R */
{
if (ind)
sprintf(right, "[,-%s]", regname[r]);
else
sprintf(right, ",-%s", regname[r]);
return 0;
}
case 0x03: /* ,--R */
{
if (ind)
sprintf(right, "[,--%s]", regname[r]);
else
sprintf(right, ",--%s", regname[r]);
return 0;
}
case 0x04: /* ,R */
{
if (ind)
sprintf(right, "[,%s]", regname[r]);
else
sprintf(right, ",%s", regname[r]);
return 0;
}
case 0x05: /* B,R */
{
if (ind)
sprintf(right, "[B,%s]", regname[r]);
else
sprintf(right, "B,%s", regname[r]);
return 0;
}
case 0x06: /* A,R */
{
if (ind)
sprintf(right, "[A,%s]", regname[r]);
else
sprintf(right, "A,%s", regname[r]);
return 0;
}
case 0x08: /* Offset8,R */
{
unsigned short v = (signed char)mem[*pc];
sprintf(buf + strlen(buf), " %2.2X", mem[*pc]);
*pc = *pc + 1;
if (ind)
sprintf(right, "[%d,%s]", (signed short)v, regname[r]);
else
sprintf(right, "%d,%s", (signed short)v, regname[r]);
return 0;
}
case 0x09: /* Offset16,R */
{
unsigned short v = (mem[*pc] << 8);
sprintf(buf + strlen(buf), " %2.2X", mem[*pc]);
*pc = *pc + 1;
v += mem[*pc];
sprintf(buf + strlen(buf), "%2.2X", mem[*pc]);
*pc = *pc + 1;
if (ind)
sprintf(right, "[%d,%s]", (signed short)v, regname[r]);
else
sprintf(right, "%d,%s", (signed short)v, regname[r]);
return 0;
}
case 0x0B: /* D,R */
{
if (ind)
sprintf(right, "[D,%s]", regname[r]);
else
sprintf(right, "D,%s", regname[r]);
return 0;
}
case 0x0C: /* Offset8,PC */
{
unsigned short v = (signed char)mem[*pc];
sprintf(buf + strlen(buf), " %2.2X", mem[*pc]);
*pc = *pc + 1;
if (ind)
sprintf(right, "[$%x,PCR]", (unsigned short)(*pc + v));
else
sprintf(right, "$%x,PCR", (unsigned short)(*pc + v));
return 0;
}
case 0x0D: /* Offset16,PC */
{
unsigned short v = (mem[*pc] << 8);
sprintf(buf + strlen(buf), " %2.2X", mem[*pc]);
*pc = *pc + 1;
v += mem[*pc];
sprintf(buf + strlen(buf), "%2.2X", mem[*pc]);
*pc = *pc + 1;
if (ind)
sprintf(right, "[$%x,PCR]", (unsigned short)(*pc + v));
else
sprintf(right, "$%x,PCR", (unsigned short)(*pc + v));
return 0;
}
case 0x0F: /* Offset16 */
{
unsigned short v = (mem[*pc] << 8);
sprintf(buf + strlen(buf), " %2.2X", mem[*pc]);
*pc = *pc + 1;
v += mem[*pc];
sprintf(buf + strlen(buf), "%2.2X", mem[*pc]);
*pc = *pc + 1;
if (ind)
sprintf(right, "[$%4.4x]", v);
else
sprintf(right, "$%4.4x", v);
return 0;
}
}
}
/* Unknown if we get here... */
return -1;
}
int unasm_lbra(unsigned char *mem, unsigned short *pc, char *buf, char *right)
{
int branch_target = 0xFFFF & (*pc + 2 + (mem[*pc] << 8) + mem[*pc + 1]);
sprintf(buf + strlen(buf), " %2.2X%2.2X", mem[*pc], mem[*pc + 1]);
sprintf(right, "$%4.4x", branch_target);
*pc = *pc + 2;
return branch_target;
}
int unasm_bra(unsigned char *mem, unsigned short *pc, char *buf, char *right)
{
int branch_target = (0xFFFF & (*pc + 1 + (signed char)mem[*pc]));
sprintf(buf + strlen(buf), " %2.2X", mem[*pc]);
sprintf(right, "$%4.4x", branch_target);
*pc = *pc + 1;
return branch_target;
}
void unasm_line(unsigned char *mem, unsigned short *at_pc, char *outbuf, int *at_target, int flag)
{
unsigned short pc;
struct fact *fact;
char buf[150];
char buf1[150];
char *insn = "???";
char *left = ""; /* Left operand, like the 'D' in ADDD */
char right[20]; /* Address mode / operand */
unsigned char opcode;
int page2 = 0;
int page3 = 0;
int ea_fact = -1;
int is_jsr = 0;
int is_swi = -1;
int branch_target = -1;
int flg;
buf[0] = 0;
right[0] = 0;
/* Fetch */
pc = *at_pc;
flg = targets[pc];
fact = facts[pc];
sprintf(buf,"%4.4X: ", pc);
if (fact) switch(fact->type) {
case 1: /* FCB */ {
int x;
for (x = 0; x != fact->len; ++x) {
fcb_line(mem, at_pc, outbuf, flag);
}
return;
} case 2: /* FDB */ {
int x;
for (x = 0; x != fact->len; ++x) {
fdb_line(mem, at_pc, outbuf, flag);
}
return;
} case 3: /* FCC */ {
fcc_line(mem, at_pc, outbuf, flag, fact->len);
return;
} case 4: /* RMB */ {
rmb_line(mem, at_pc, outbuf, flag, fact->len);
return;
}
}
/* Decode instruction: */
/* Set 'insn' to instruction mnemonic */
/* Set operand to its operand */
/* Fetch op-code, deal with page2/page3 */
opcode = mem[pc++];
sprintf(buf + strlen(buf), "%2.2X", opcode);
if (opcode == 0x10) {
page2 = 1;
sprintf(buf + strlen(buf), "%2.2X", mem[pc]);
opcode = mem[pc++];
} else if (opcode == 0x11) {
page3 = 1;
sprintf(buf + strlen(buf), "%2.2X", mem[pc]);
opcode = mem[pc++];
}
if (opcode & 0x80) { /* R,M operations */
unsigned char lowop = (opcode & 0x0F);
int sixteen = 0; /* Assume 8-bit */
/* Get operand A */
if (opcode & 0x40) {
if (lowop == 0x3 || lowop == 0xC || lowop == 0xD) {
left = "D";
sixteen = 1;
} else if (lowop == 0xE || lowop == 0xF) {
sixteen = 1;
if (page2) {
left = "S";
} else {
left = "U";
}
} else {
left = "B";
}
} else {
if (lowop == 0x3) {
sixteen = 1;
if (page3) {
left = "U";
} else {
left = "D";
}
} else if (lowop == 0xC) {
sixteen = 1;
if (page2) {
left = "Y";
} else if (page3) {
left = "S";
} else {
left = "X";
}
} else if (lowop == 0x0E || lowop == 0x0F) {
sixteen = 1;
if (page2) {
left = "Y";
} else {
left = "X";
}
} else {
/* will get here for lowop == 0x0D, but it's OK */
left = "A";
}
}
/* Get operand B's effective address */
switch (opcode & 0x30) {
case 0x00: {
if (sixteen) {
sprintf(buf + strlen(buf), " %2.2X%2.2X", mem[pc], mem[pc + 1]);
sprintf(right, "#$%4.4x", (mem[pc] << 8) + mem[pc + 1]);
pc += 2;
} else {
sprintf(buf + strlen(buf), " %2.2X", mem[pc]);
sprintf(right, "#$%2.2x", mem[pc]);
pc += 1;
}
break;
} case 0x10: {
sprintf(buf + strlen(buf), " %2.2X", mem[pc]);
sprintf(right, "$%2.2x", mem[pc++]);
break;
} case 0x20: {
if (unasm_ind(mem, &pc, buf, right))
goto invalid;
break;
} case 0x30: {
sprintf(buf + strlen(buf), " %2.2X%2.2X", mem[pc], mem[pc + 1]);
sprintf(right, "$%4.4x", (mem[pc] << 8) + mem[pc + 1]);
pc += 2;
break;
}
}
/* Operate F = A op B */
/* If A doesn't change, then we must F = A */
switch (opcode & 0x0F) {
case 0x00: /* SUB N,Z,V,C,H) */ {
insn = "SUB";
break;
} case 0x01: /* CMP N,Z,V,C,H */ {
insn = "CMP";
break;
} case 0x02: /* SBC N,Z,V,C,H */ {
insn = "SBC";
break;
} case 0x03: /* SUBD/CMPD/CMPU or ADDD */ {
if (opcode & 0x40) {
insn = "ADD";
} else {
if (page3 || page2)
insn = "CMP";
else
insn = "SUB";
}
break;
} case 0x04: /* AND N,Z,V=0 */ {
insn = "AND";
break;
} case 0x05: /* BIT N,Z,V=0 */ {
insn = "BIT";
break;
} case 0x06: /* LDA N,Z,V=0 */ {
insn = "LD";
break;
} case 0x07: /* STA N,Z,V=0 */ {
insn = "ST";
break;
} case 0x08: /* EOR N,Z,V=0*/ {
insn = "EOR";
break;
} case 0x09: /* ADC H,N,Z,V,C */ {
insn = "ADC";
break;
} case 0x0A: /* ORA N,Z,V=0 */ {
insn = "ORA";
break;
} case 0x0B: /* ADD H,N,Z,V,C */ {
insn = "ADD";
break;
} case 0x0C: {
if (opcode & 0x40) { /* LDD */
insn = "LD";
} else { /* CMPX/CMPY/CMPS */
insn = "CMP";
}
break;
} case 0x0D: {
if (opcode & 0x40) { /* STD */
insn = "ST";
} else { /* BSR/JSR */
if (!(opcode & 0x30)) { /* BSR */
insn = "BSR";
/* Replace immediate operand with branch target */
branch_target = (0xFFFF & (pc + (signed char)mem[0xFFFF & (pc - 1)]));
sprintf(right, "$%4.4x", branch_target);
left = "";
} else {
insn = "JSR";
left = "";
}
}
break;
} case 0x0E: { /* LDX/LDY/LDU/LDS */
insn = "LD";
break;
} case 0x0F: { /* STX/STY/STU/STS */
insn = "ST";
break;
}
}
} else if ((opcode & 0x40) || !(opcode & 0xF0)) { /* R.M.W. operations */
/* Fetch load operand */
if (!(opcode & 0xF0)) {
/* Direct */
sprintf(buf + strlen(buf), " %2.2X", mem[pc]);
sprintf(right, "$%2.2x", mem[pc++]);
} else {
switch (opcode & 0x30) {
case 0x00: {
/* ACCA */
left = "A";
break;
} case 0x10: {
/* ACCB */
left = "B";
break;
} case 0x20: {
/* Indexed */
if (unasm_ind(mem, &pc, buf, right))
goto invalid;
break;
} case 0x30: {
/* Extended */
sprintf(buf + strlen(buf), " %2.2X%2.2X", mem[pc], mem[pc+1]);
sprintf(right, "$%4.4x", (mem[pc] << 8) + mem[pc+1]);
pc += 2;
break;
}
}
}
/* Operate */
switch (opcode & 0x0F) {
case 0x00: /* NEG N, Z, V= ((f==0x80)?1:0), C= ((f==0)?1:0) */ {
insn = "NEG";
break;
} case 0x01: /* ??? */ {
goto invalid;
break;
} case 0x02: /* ??? */ {
goto invalid;
break;
} case 0x03: /* COM N, Z, V=0, C=1 */ {
insn = "COM";
break;
} case 0x04: /* LSR N=0,Z,C,V=N^C */ {
insn = "LSR";
break;
} case 0x05: /* ??? */ {
goto invalid;
break;
} case 0x06: /* ROR N,Z,C,V=N^C */ {
insn = "ROR";
break;
} case 0x07: /* ASR N,Z,C,V=N^C */ {
insn = "ASR";
break;
} case 0x08: /* ASL N,Z,C,V=N^C */ {
insn = "ASL";
break;
} case 0x09: /* ROL N,Z,C,V=N^C */ {
insn = "ROL";
break;
} case 0x0A: /* DEC N,Z,V = (a=0x80?1:0) */ {
insn = "DEC";
break;
} case 0x0B: /* ??? */ {
goto invalid;
break;
} case 0x0C: /* INC N,Z,V = (a=0x7F?1:0) */ {
insn = "INC";
break;
} case 0x0D: /* TST N,Z,V=0,C=0 */ {
insn = "TST";
break;
} case 0x0E: /* JMP */ {
insn = "JMP";
break;
} case 0x0F: /* CLR N=0, Z=1, V=0, C=0 */ {
insn = "CLR";
break;
}
}
} else {
switch(opcode) {
case 0x12: { /* NOP */
insn = "NOP";
break;
} case 0x13: { /* SYNC */
insn = "SYNC";
break;
} case 0x16: { /* LBRA */
insn = "LBRA";
branch_target = unasm_lbra(mem, &pc, buf, right);
break;
} case 0x17: { /* LBSR */
insn = "LBSR";
branch_target = unasm_lbra(mem, &pc, buf, right);
break;
} case 0x19: { /* DAA N,Z,V,C */
insn = "DAA";
break;
} case 0x1A: { /* ORCC */
insn = "ORCC";
sprintf(buf + strlen(buf), " %2.2X", mem[pc]);
sprintf(right, "#$%2.2x", mem[pc++]);
break;
} case 0x1C: { /* ANDCC */
insn = "ANDCC";
sprintf(buf + strlen(buf), " %2.2X", mem[pc]);
sprintf(right, "#$%2.2x", mem[pc++]);
break;
} case 0x1D: { /* SEX */
insn = "SEX";
break;
} case 0x1E: { /* EXG */
char *n;
insn = "EXG";
sprintf(buf + strlen(buf), " %2.2X", mem[pc]);
if (tfr_name(&n, mem[pc] >> 4))
goto invalid;
strcat(right, n);
if (tfr_name(&n, mem[pc] & 0xF))
goto invalid;
pc++;
strcat(right, ",");
strcat(right, n);
break;
} case 0x1F: { /* TFR */
char *n;
insn = "TFR";
sprintf(buf + strlen(buf), " %2.2X", mem[pc]);
if (tfr_name(&n, mem[pc] >> 4))
goto invalid;
strcat(right, n);
if (tfr_name(&n, mem[pc] & 0xF))
goto invalid;
pc++;
strcat(right, ",");
strcat(right, n);
break;
} case 0x30: { /* LEAX */
insn = "LEAX";
if (unasm_ind(mem, &pc, buf, right))
goto invalid;
break;
} case 0x31: { /* LEAY */
insn = "LEAY";
if (unasm_ind(mem, &pc, buf, right))
goto invalid;
break;
} case 0x32: { /* LEAS */
insn = "LEAS";
if (unasm_ind(mem, &pc, buf, right))
goto invalid;
break;
} case 0x33: { /* LEAU */
insn = "LEAU";
if (unasm_ind(mem, &pc, buf, right))
goto invalid;
break;
} case 0x34: { /* PSHS */
insn = "PSHS";
show_list(0, right, mem[pc++]);
break;
} case 0x35: { /* PULS */
insn = "PULS";
show_list(0, right, mem[pc++]);
break;
} case 0x36: { /* PSHU */
insn = "PSHU";
show_list(1, right, mem[pc++]);
break;
} case 0x37: { /* PULU */
insn = "PULU";
show_list(1, right, mem[pc++]);
break;
} case 0x39: { /* RTS */
insn = "RTS";
break;
} case 0x3A: { /* ABX */
insn = "ABX";
break;
} case 0x3B: { /* RTI */
insn = "RTI";
break;
} case 0x3C: { /* CWAI */
insn = "CWAI";
break;
} case 0x3D: { /* MUL */
insn = "MUL";
break;
} case 0x3F: { /* SWI */
if (page2)
insn = "SWI2";
else if (page3)
insn = "SWI3";
else {
insn = "SWI";
}
break;
} case 0x20: /* BRA */ {
if (page2) {
insn = "LBRA";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BRA";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x21: /* BRN */ {
if (page2) {
insn = "LBRN";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BRN";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x22: /* BHI */ {
if (page2) {
insn = "LBHI";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BHI";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x23: /* BLS */ {
if (page2) {
insn = "LBLS";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BLS";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x24: /* BCC */ {
if (page2) {
insn = "LBCC";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BCC";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x25: /* BCS */ {
if (page2) {
insn = "LBCS";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BCS";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x26: /* BNE */ {
if (page2) {
insn = "LBNE";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BNE";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x27: /* BEQ */ {
if (page2) {
insn = "LBEQ";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BEQ";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x28: /* BVC */ {
if (page2) {
insn = "LBVC";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BVC";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x29: /* BVS */ {
if (page2) {
insn = "LBVS";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BVS";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x2A: /* BPL */ {
if (page2) {
insn = "LBPL";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BPL";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x2B: /* BMI */ {
if (page2) {
insn = "LBMI";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BMI";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x2C: /* BGE */ {
if (page2) {
insn = "LBGE";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BGE";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x2D: /* BLT */ {
if (page2) {
insn = "LBLT";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BLT";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x2E: /* BGT */ {
if (page2) {
insn = "LBGT";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BGT";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} case 0x2F: /* BLE */ {
if (page2) {
insn = "LBLE";
branch_target = unasm_lbra(mem, &pc, buf, right);
} else {
insn = "BLE";
branch_target = unasm_bra(mem, &pc, buf, right);
}
break;
} default: /* ??? */ {
goto invalid;
break;
}
}
}
invalid:
if (fact)
sprintf(buf1, "%-10s ", fact->label);
else if (flg)
sprintf(buf1, "L%4.4d ", flg);
else
sprintf(buf1, " ");
strcat(buf1, insn);
strcat(buf1, left);
strcat(buf1, " ");
strcat(buf1, right);
if (ea_fact == -1 && (branch_target >= 0 && branch_target <= 0xFFFF))
ea_fact = branch_target;
if (ea_fact != -1) {
struct fact *f = facts[ea_fact];
if (f) {
sprintf(buf1 + strlen(buf1)," [%s %s]", f->label,f->comment);
}
}
sprintf(outbuf, "%-15s%-9s",buf, buf1);
if (is_swi != -1) {
struct fact *f;
for (f = swi_facts;f;f = f->next)
if (f->len == is_swi)
break;
if (f) {
sprintf(outbuf + strlen(outbuf), " (%s %s)",f->label,f->comment);
}
} else if (branch_target > 0 && branch_target < 0x10000 && facts[branch_target]) {
/* sprintf(outbuf + strlen(outbuf), " (to %s [%s])", facts[branch_target]->label, facts[branch_target]->comment); */
} else if (branch_target > 0 && branch_target < 0x10000 && targets[branch_target])