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MCS51.c
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/*
* S51D - Simple MCS51 Debugger
*
* Copyright (C) 2011, Michał Dobaczewski / mdobak@(Google mail)
*
* 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
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "MCS51.h"
#include "Utils.h"
/*
* Default memory wrappers.
*/
inline BYTE* _mcuIntRAM(MCU* mcu, BYTE address, bool direct, bool info)
{
if (address >= mcu->idataMemorySize && !direct) {
address &= mcu->idataMemorySize - 1;
mcu->errid = E_IRAMOUTSIDE;
}
if (address < 0x80) {
if (info) {
mcu->_beforeAccessedIntRAM = mcu->idata[address];
mcu->accessedIntRAM = address;
}
return &mcu->idata[address];
} else {
if (direct) {
if (info) {
mcu->_beforeAccessedSFR = mcu->sfr[address - 0x80];
mcu->accessedSFR = address;
}
return &mcu->sfr[address - 0x80];
} else { // indirect
if (info) {
mcu->_beforeAccessedIntRAM = mcu->idata[address];
mcu->accessedIntRAM = address;
}
return &mcu->idata[address];
}
}
}
inline void _mcuSetIntRAM(MCU* mcu, BYTE address, bool direct, BYTE value, bool info)
{
if (direct && address == 0x99)
mcu->OUTPUT = value;
*_mcuIntRAM(mcu, address, direct, info) = value;
}
inline BYTE* _mcuExtRAM(MCU* mcu, WORD address, bool info)
{
if (address >= mcu->xdataMemorySize) {
address %= mcu->xdataMemorySize == 0 ? 1 : mcu->xdataMemorySize;
mcu->errid = E_XRAMOUTSIDE;
}
if (info) {
mcu->_beforeAccessedExtRAM = mcu->xdata[address];
mcu->accessedExtROM = address;
}
return &mcu->xdata[address];
}
inline BYTE* _mcuROM(MCU* mcu, WORD address, bool info)
{
if (mcu->xromMemorySize != 0 && (address >= mcu->iromMemorySize || !mcu->EA)) {
if (address >= mcu->xromMemorySize) {
address %= mcu->xdataMemorySize == 0 ? 1 : mcu->xdataMemorySize;
}
if (info)
mcu->accessedExtROM = address;
return &mcu->xrom[address];
}
if (address >= mcu->iromMemorySize) {
address %= mcu->idataMemorySize == 0 ? 1 : mcu->idataMemorySize;
}
if (info)
mcu->accessedIntROM = address;
return &mcu->irom[address];
}
inline BYTE* mcuIntRAM(MCU* mcu, BYTE address, bool direct)
{
return _mcuIntRAM(mcu, address, direct, true);
}
inline void mcuSetIntRAM(MCU* mcu, BYTE address, bool direct, BYTE value)
{
_mcuSetIntRAM(mcu, address, direct, value, true);
}
inline BYTE* mcuExtRAM(MCU* mcu, WORD address)
{
return _mcuExtRAM(mcu, address, true);
}
inline BYTE* mcuROM(MCU* mcu, WORD address)
{
return _mcuROM(mcu, address, true);
}
inline bool mcuCheckBit(MCU* mcu, BYTE bit)
{
BYTE address;
BYTE bitToCheck;
address = bit & 0xF8;
bitToCheck = bit & 0x07;
if (bit >= 0x80) { // sfr
if (*mcuIntRAM(mcu, address, true) & 1 << bitToCheck) {
return true;
} else {
return false;
}
} else { // int ram
address = (address >> 3) + 32;
if (*mcuIntRAM(mcu, address, true) & 1 << bitToCheck) {
return true;
} else {
return false;
}
}
}
inline void mcuSetBit(MCU* mcu, BYTE bit, bool state)
{
BYTE address;
BYTE bitToCheck;
address = bit & 0xF8;
bitToCheck = bit & 0x07;
if (bit >= 0x80) { // sfr
if (state)
*mcuIntRAM(mcu, address, true) |= 1 << bitToCheck;
else
*mcuIntRAM(mcu, address, true) &= ~(1 << bitToCheck);
} else { // int ram
address = (address >> 3) + 32;
if (state)
*mcuIntRAM(mcu, address, true) |= 1 << bitToCheck;
else
*mcuIntRAM(mcu, address, true) &= ~(1 << bitToCheck);
}
}
inline void mcuAdd(MCU* mcu, BYTE* a, BYTE* b)
{
int temp1, temp2;
if (((0x0F & *a) + (0x0F & *b)) > 0x0F)
setRegister(mcu, PSW_AC, true);
else
setRegister(mcu, PSW_AC, false);
temp1 = ((0x7F & *a) + (0x7F & *b)) > 0x7F;
temp2 = *a + *b;
if (temp2 > 0xFF) {
setRegister(mcu, PSW_CY, true);
if (temp1)
setRegister(mcu, PSW_OV, false);
else
setRegister(mcu, PSW_OV, true);
} else {
setRegister(mcu, PSW_CY, false);
if (temp1)
setRegister(mcu, PSW_OV, true);
else
setRegister(mcu, PSW_OV, false);
}
*a = (BYTE) temp2 & 0xFF;
}
inline void mcuAddc(MCU* mcu, BYTE* a, BYTE* b)
{
int temp1, temp2, c = checkRegister(mcu, PSW_CY);
if (((0x0F & *a) + (0x0F & (*b + c))) > 0x0F)
setRegister(mcu, PSW_AC, true);
else
setRegister(mcu, PSW_AC, false);
temp1 = ((0x7F & *a) + (0x7F & *b)) + c > 0x7F;
temp2 = *a + *b + c;
if (temp2 > 0xFF) {
setRegister(mcu, PSW_CY, true);
if (temp1)
setRegister(mcu, PSW_OV, false);
else
setRegister(mcu, PSW_OV, true);
} else {
setRegister(mcu, PSW_CY, false);
if (temp1)
setRegister(mcu, PSW_OV, true);
else
setRegister(mcu, PSW_OV, false);
}
*a = (BYTE) temp2 & 0xFF;
}
extern inline void mcuSub(MCU* mcu, BYTE* a, BYTE* b)
{
int temp1, temp2, c = checkRegister(mcu, PSW_CY);
if (((char) (0x0F & *a) - (char) (0xF & *b) - c))
setRegister(mcu, PSW_AC, true);
else
setRegister(mcu, PSW_AC, false);
temp1 = ((char) (0x7F & *a) - (char) (0x7F & *b) - c) < 0;
temp2 = *a - *b - c;
if (temp2 < 0) {
setRegister(mcu, PSW_CY, true);
if (temp1)
setRegister(mcu, PSW_OV, false);
else
setRegister(mcu, PSW_OV, true);
} else {
setRegister(mcu, PSW_CY, false);
if (temp1)
setRegister(mcu, PSW_OV, true);
else
setRegister(mcu, PSW_OV, false);
}
*a = (BYTE) temp2 & 0xFF;
}
// nop
void nop_00(MCU* mcu)
{
mcu->PC += 1;
}
// mov a,#(byte)
void mov_74(MCU* mcu)
{
mcu->PC += 1;
*mcu->ACC = *mcuROM(mcu, mcu->PC);
mcu->PC += 1;
}
// mov (adress),#(byte)
void mov_75(MCU* mcu)
{
mcu->PC += 1;
mcuSetIntRAM(mcu, *mcuROM(mcu, mcu->PC), true, *mcuROM(mcu, mcu->PC + 1));
mcu->PC += 2;
}
// ljmp 16bit_adres
void ljmp_02(MCU* mcu)
{
mcu->PC += 1;
mcu->PC = (WORD) *mcuROM(mcu, mcu->PC) << 8 | *mcuROM(mcu, mcu->PC + 1);
}
// sjmp offset
void sjmp_80(MCU* mcu)
{
mcu->PC += 1;
mcu->PC += (signed char) *mcuROM(mcu, mcu->PC) + 1;
}
// mov (adress1),(ardess2)
void mov_85(MCU* mcu)
{
mcu->PC += 1;
mcuSetIntRAM(mcu, *mcuROM(mcu, mcu->PC + 1), true, *mcuIntRAM(mcu,
*mcuROM(mcu, mcu->PC), true));
mcu->PC += 2;
}
// mov A,(adress)
void mov_E5(MCU* mcu)
{
mcu->PC += 1;
*mcu->ACC = *mcuIntRAM(mcu, *mcuROM(mcu, mcu->PC), true);
mcu->PC += 1;
}
// mov (bit),C
void mov_92(MCU* mcu)
{
mcu->PC += 1;
if (checkRegister(mcu, PSW_CY))
mcuSetBit(mcu, *mcuROM(mcu, mcu->PC), true);
else
mcuSetBit(mcu, *mcuROM(mcu, mcu->PC), false);
mcu->PC += 1;
}
// inc a
void inc_04(MCU* mcu)
{
(*mcu->ACC)++;
mcu->PC += 1;
}
// inc (adress)
void inc_05(MCU* mcu)
{
mcu->PC += 1;
(*mcuIntRAM(mcu, *mcuROM(mcu, mcu->PC), true))++;
mcu->PC += 1;
}
// inc DPTR
void inc_A3(MCU* mcu)
{
*mcu->DPTR = *mcu->DPTR + 1;
mcu->PC += 1;
}
// inc @R0
void inc_06(MCU* mcu)
{
(*mcuIntRAM(mcu, mcu->R[0], false))++;
mcu->PC += 1;
}
// inc @R1
void inc_07(MCU* mcu)
{
(*mcuIntRAM(mcu, mcu->R[1], false))++;
mcu->PC += 1;
}
// inc R0
void inc_08(MCU* mcu)
{
mcu->R[0]++;
mcu->PC += 1;
}
// inc R1
void inc_09(MCU* mcu)
{
mcu->R[1]++;
mcu->PC += 1;
}
// inc R2
void inc_0A(MCU* mcu)
{
mcu->R[2]++;
mcu->PC += 1;
}
// inc R3
void inc_0B(MCU* mcu)
{
mcu->R[3]++;
mcu->PC += 1;
}
// inc R4
void inc_0C(MCU* mcu)
{
mcu->R[4]++;
mcu->PC += 1;
}
// inc R5
void inc_0D(MCU* mcu)
{
mcu->R[5]++;
mcu->PC += 1;
}
// inc R6
void inc_0E(MCU* mcu)
{
mcu->R[6]++;
mcu->PC += 1;
}
// inc R7
void inc_0F(MCU* mcu)
{
mcu->R[7]++;
mcu->PC += 1;
}
// dec A
void dec_14(MCU* mcu)
{
*mcu->ACC = *mcu->ACC - 1;
mcu->PC += 1;
}
// dec (adress)
void dec_15(MCU* mcu)
{
mcu->PC += 1;
(*mcuIntRAM(mcu, *mcuROM(mcu, mcu->PC), true))--;
mcu->PC += 1;
}
// dec @R0
void dec_16(MCU* mcu)
{
(*mcuIntRAM(mcu, mcu->R[0], false))--;
mcu->PC += 1;
}
// dec @R1
void dec_17(MCU* mcu)
{
(*mcuIntRAM(mcu, mcu->R[1], false))--;
mcu->PC += 1;
}
// dec R0
void dec_18(MCU* mcu)
{
mcu->R[0]--;
mcu->PC += 1;
}
// dec R1
void dec_19(MCU* mcu)
{
mcu->R[1]--;
mcu->PC += 1;
}
// dec R2
void dec_1A(MCU* mcu)
{
mcu->R[2]--;
mcu->PC += 1;
}
// dec R3
void dec_1B(MCU* mcu)
{
mcu->R[3]--;
mcu->PC += 1;
}
// dec R4
void dec_1C(MCU* mcu)
{
mcu->R[4]--;
mcu->PC += 1;
}
// dec R5
void dec_1D(MCU* mcu)
{
mcu->R[5]--;
mcu->PC += 1;
}
// dec R6
void dec_1E(MCU* mcu)
{
mcu->R[6]--;
mcu->PC += 1;
}
// dec R7
void dec_1F(MCU* mcu)
{
mcu->R[7]--;
mcu->PC += 1;
}
// div AB
void div_84(MCU* mcu)
{
BYTE tempB;
setRegister(mcu, PSW_CY, false);
if (*mcu->B != 0) {
tempB = *mcu->ACC;
*mcu->ACC = tempB / *mcu->B;
*mcu->B = tempB % *mcu->B;
} else
setRegister(mcu, PSW_OV, true);
mcu->PC += 1;
}
// mul AB
void mul_A4(MCU* mcu)
{
WORD tempW;
tempW = (WORD) *mcu->ACC * (WORD) *mcu->B;
if (tempW > 255)
setRegister(mcu, PSW_OV, true);
else
setRegister(mcu, PSW_OV, false);
*mcu->B = (BYTE) tempW >> 8;
*mcu->ACC = (BYTE) (tempW & 0xFF);
mcu->PC += 1;
}
// rl A
void rl_23(MCU* mcu)
{
BYTE tempB;
tempB = *mcu->ACC;
*mcu->ACC = tempB << 1 | tempB >> 7;
mcu->PC += 1;
}
// rr A
void rr_03(MCU* mcu)
{
BYTE tempB;
tempB = *mcu->ACC;
*mcu->ACC = tempB >> 1 | tempB << 7;
mcu->PC += 1;
}
// rlc A
void rlc_33(MCU* mcu)
{
BYTE tempB;
tempB = *mcu->ACC;
*mcu->ACC = tempB << 1 | checkRegister(mcu, PSW_CY);
if (tempB & 0x80)
setRegister(mcu, PSW_CY, true);
else
setRegister(mcu, PSW_CY, false);
mcu->PC += 1;
}
// rrc A
void rrc_13(MCU* mcu)
{
BYTE tempB;
tempB = *mcu->ACC;
*mcu->ACC = tempB >> 1 | checkRegister(mcu, PSW_CY) << 7;
if (tempB & 0x01)
setRegister(mcu, PSW_CY, true);
else
setRegister(mcu, PSW_CY, false);
mcu->PC += 1;
}
// mov DPTR,#(16-bit data)
void mov_90(MCU* mcu)
{
mcu->PC += 1;
*mcu->DPH = *mcuROM(mcu, mcu->PC);
mcu->PC += 1;
*mcu->DPL = *mcuROM(mcu, mcu->PC);
mcu->PC += 1;
}
// mov (adress),A
void mov_F5(MCU* mcu)
{
mcu->PC += 1;
mcuSetIntRAM(mcu, *mcuROM(mcu, mcu->PC), true, *mcu->ACC);
mcu->PC += 1;
}
// add A,#(data)
void add_24(MCU* mcu)
{
mcu->PC += 1;
mcuAdd(mcu, mcu->ACC, &*mcuROM(mcu, mcu->PC));
mcu->PC += 1;
}
// add A,(adres)
void add_25(MCU* mcu)
{
mcu->PC += 1;
mcuAdd(mcu, mcu->ACC, mcuIntRAM(mcu, *mcuROM(mcu, mcu->PC), true));
mcu->PC += 1;
}
// add A,@R0
void add_26(MCU* mcu)
{
mcuAdd(mcu, mcu->ACC, mcuIntRAM(mcu, mcu->R[0], false));
mcu->PC += 1;
}
// add A,@R1
void add_27(MCU* mcu)
{
mcuAdd(mcu, mcu->ACC, mcuIntRAM(mcu, mcu->R[1], false));
mcu->PC += 1;
}
// add A,R0
void add_28(MCU* mcu)
{
mcuAdd(mcu, mcu->ACC, &mcu->R[0]);
mcu->PC += 1;
}
// add A,R1
void add_29(MCU* mcu)
{
mcuAdd(mcu, mcu->ACC, &mcu->R[1]);
mcu->PC += 1;
}
// add A,R2
void add_2A(MCU* mcu)
{
mcuAdd(mcu, mcu->ACC, &mcu->R[2]);
mcu->PC += 1;
}
// add A,R3
void add_2B(MCU* mcu)
{
mcuAdd(mcu, mcu->ACC, &mcu->R[3]);
mcu->PC += 1;
}
// add A,R4
void add_2C(MCU* mcu)
{
mcuAdd(mcu, mcu->ACC, &mcu->R[4]);
mcu->PC += 1;
}
// add A,R5
void add_2D(MCU* mcu)
{
mcuAdd(mcu, mcu->ACC, &mcu->R[5]);
mcu->PC += 1;
}
// add A,R6
void add_2E(MCU* mcu)
{
mcuAdd(mcu, mcu->ACC, &mcu->R[6]);
mcu->PC += 1;
}
// add A,R7
void add_2F(MCU* mcu)
{
mcuAdd(mcu, mcu->ACC, &mcu->R[7]);
mcu->PC += 1;
}
// ADDC
// addc A,#(data)
void addc_34(MCU* mcu)
{
mcu->PC += 1;
mcuAddc(mcu, mcu->ACC, &*mcuROM(mcu, mcu->PC));
mcu->PC += 1;
}
// addc A,(adres)
void addc_35(MCU* mcu)
{
mcu->PC += 1;
mcuAddc(mcu, mcu->ACC, mcuIntRAM(mcu, *mcuROM(mcu, mcu->PC), true));
mcu->PC += 1;
}
// addc A,@R0
void addc_36(MCU* mcu)
{
mcuAddc(mcu, mcu->ACC, mcuIntRAM(mcu, mcu->R[0], false));
mcu->PC += 1;
}
// addc A,@R1
void addc_37(MCU* mcu)
{
mcuAddc(mcu, mcu->ACC, mcuIntRAM(mcu, mcu->R[1], false));
mcu->PC += 1;
}
// addc A,R0
void addc_38(MCU* mcu)
{
mcuAddc(mcu, mcu->ACC, &mcu->R[0]);
mcu->PC += 1;
}
// addc A,R1
void addc_39(MCU* mcu)
{
mcuAddc(mcu, mcu->ACC, &mcu->R[1]);
mcu->PC += 1;
}
// addc A,R2
void addc_3A(MCU* mcu)
{
mcuAddc(mcu, mcu->ACC, &mcu->R[2]);
mcu->PC += 1;
}
// addc A,R3
void addc_3B(MCU* mcu)
{
mcuAddc(mcu, mcu->ACC, &mcu->R[3]);
mcu->PC += 1;
}
// addc A,R4
void addc_3C(MCU* mcu)
{
mcuAddc(mcu, mcu->ACC, &mcu->R[4]);
mcu->PC += 1;
}
// addc A,R5
void addc_3D(MCU* mcu)
{
mcuAddc(mcu, mcu->ACC, &mcu->R[5]);
mcu->PC += 1;
}
// addc A,R6
void addc_3E(MCU* mcu)
{
mcuAddc(mcu, mcu->ACC, &mcu->R[6]);
mcu->PC += 1;
}
// addc A,R7
void addc_3F(MCU* mcu)
{
mcuAddc(mcu, mcu->ACC, &mcu->R[7]);
mcu->PC += 1;
}
// movx A,@DPTR
void movx_E0(MCU* mcu)
{
*mcu->ACC = *mcuExtRAM(mcu, *mcu->DPTR);
mcu->PC += 1;
}
// movx @DPTR,A
void movx_F0(MCU* mcu)
{
*mcuExtRAM(mcu, *mcu->DPTR) = *mcu->ACC;
mcu->PC += 1;
}
// push (adress)
void push_C0(MCU* mcu)
{
*mcu->SP += 1;
mcu->PC += 1;
mcuSetIntRAM(mcu, *mcu->SP, false, *mcuIntRAM(mcu, *mcuROM(mcu, mcu->PC), true));
mcu->PC += 1;
}
// pop (adress)
void pop_D0(MCU* mcu)
{
mcu->PC += 1;
mcuSetIntRAM(mcu, *mcuROM(mcu, mcu->PC), true, *mcuIntRAM(mcu, *mcu->SP, false));
*mcu->SP = *mcu->SP - 1;
mcu->PC += 1;
}
// clr C
void clr_C3(MCU* mcu)
{
setRegister(mcu, PSW_CY, false);
mcu->PC += 1;
}
// setb C
void setb_D3(MCU* mcu)
{
setRegister(mcu, PSW_CY, true);
mcu->PC += 1;
}
// setb (bit)
void setb_D2(MCU* mcu)
{
mcu->PC += 1;
mcuSetBit(mcu, *mcuROM(mcu, mcu->PC), true);
mcu->PC += 1;
}
// clr (bit)
void clr_C2(MCU* mcu)
{
mcu->PC += 1;
mcuSetBit(mcu, *mcuROM(mcu, mcu->PC), false);
mcu->PC += 1;
}
// xrl (adress),A
void xrl_62(MCU* mcu)
{
mcu->PC += 1;
mcuSetIntRAM(mcu, *mcuROM(mcu, mcu->PC), true, *mcuIntRAM(mcu,
*mcuROM(mcu, mcu->PC), true) ^ (*mcu->ACC));
mcu->PC += 1;
}
// xrl (adress),#(data)
void xrl_63(MCU* mcu)
{
mcu->PC += 1;
*mcuIntRAM(mcu, *mcuROM(mcu, mcu->PC), true) ^= *mcuROM(mcu, mcu->PC + 1);
mcu->PC += 2;
}
// xrl A,#(data)
void xrl_64(MCU* mcu)
{
mcu->PC += 1;
*mcu->ACC = *mcu->ACC ^ *mcuROM(mcu, mcu->PC);
mcu->PC += 1;
}
// xrl A,(adress)
void xrl_65(MCU* mcu)
{
mcu->PC += 1;
*mcu->ACC = *mcu->ACC ^ *mcuIntRAM(mcu, *mcuROM(mcu, mcu->PC), true);
mcu->PC += 1;
}
// xrl A,@R0
void xrl_66(MCU* mcu)
{
*mcu->ACC = *mcu->ACC ^ *mcuIntRAM(mcu, mcu->R[0], false);
mcu->PC += 1;
}
// xrl A,@R1
void xrl_67(MCU* mcu)
{
*mcu->ACC = *mcu->ACC ^ *mcuIntRAM(mcu, mcu->R[1], false);
mcu->PC += 1;
}
// xrl A,R0
void xrl_68(MCU* mcu)
{
*mcu->ACC = (*mcu->ACC) ^ mcu->R[0];
mcu->PC += 1;
}
// xrl A,R1
void xrl_69(MCU* mcu)
{
*mcu->ACC = (*mcu->ACC) ^ mcu->R[1];
mcu->PC += 1;
}
// xrl A,R2
void xrl_6A(MCU* mcu)
{
*mcu->ACC = (*mcu->ACC) ^ mcu->R[2];
mcu->PC += 1;
}
// xrl A,R3
void xrl_6B(MCU* mcu)
{
*mcu->ACC = (*mcu->ACC) ^ mcu->R[3];
mcu->PC += 1;
}
// xrl A,R4
void xrl_6C(MCU* mcu)
{
*mcu->ACC = (*mcu->ACC) ^ mcu->R[4];
mcu->PC += 1;
}
// xrl A,R5
void xrl_6D(MCU* mcu)
{
*mcu->ACC = (*mcu->ACC) ^ mcu->R[5];
mcu->PC += 1;
}
// xrl A,R6
void xrl_6E(MCU* mcu)
{
*mcu->ACC = (*mcu->ACC) ^ mcu->R[6];
mcu->PC += 1;
}
// xrl A,R7
void xrl_6F(MCU* mcu)
{
*mcu->ACC = (*mcu->ACC) ^ mcu->R[7];
mcu->PC += 1;
}
// xch A,(adress)
void xch_C5(MCU* mcu)
{
BYTE tempB;
mcu->PC += 1;
tempB = *mcu->ACC;
*mcu->ACC = *mcuIntRAM(mcu, *mcuROM(mcu, mcu->PC), true);
mcuSetIntRAM(mcu, *mcuROM(mcu, mcu->PC), true, tempB);
mcu->PC += 1;
}
// xch A,@R0
void xch_C6(MCU* mcu)
{
BYTE tempB;
tempB = *mcu->ACC;
*mcu->ACC = *mcuIntRAM(mcu, mcu->R[0], false);
mcuSetIntRAM(mcu, mcu->R[0], false, tempB);
mcu->PC += 1;
}
// xch A,@R1
void xch_C7(MCU* mcu)
{
BYTE tempB;
tempB = *mcu->ACC;
*mcu->ACC = *mcuIntRAM(mcu, mcu->R[1], false);
mcuSetIntRAM(mcu, mcu->R[1], false, tempB);
mcu->PC += 1;
}
// xch A,R0
void xch_C8(MCU* mcu)
{
BYTE tempB;
tempB = *mcu->ACC;
*mcu->ACC = mcu->R[0];
mcu->R[0] = tempB;
mcu->PC += 1;
}
// xch A,R1
void xch_C9(MCU* mcu)
{
BYTE tempB;
tempB = *mcu->ACC;
*mcu->ACC = mcu->R[1];
mcu->R[1] = tempB;
mcu->PC += 1;
}
// xch A,R2
void xch_CA(MCU* mcu)
{
BYTE tempB;
tempB = *mcu->ACC;
*mcu->ACC = mcu->R[2];