sigonasr2/CHIP8Emulator
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Implemented more opcodes

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Co-authored-by: sigonasr2 <sigonasr2@gmail.com>
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sigonasr2 2023-01-04 03:09:26 -06:00
parent 03a722529a
commit 9e47287989
2 changed files with 27 additions and 11 deletions
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main.cpp
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@ -1,6 +1,7 @@
#include "pixelGameEngine.h" #include "pixelGameEngine.h"
#include "Polygon.h" #include "Polygon.h"
#include <stack> #include <stack>
#include <bitset>
using namespace olc; using namespace olc;
@ -52,11 +53,24 @@ public:
uint16_t index; //One 16-bit index register called “I” which is used to point at locations in memory uint16_t index; //One 16-bit index register called “I” which is used to point at locations in memory
std::array<uint8_t,16>reg; std::array<uint8_t,16>reg;
std::string Display8(int number){
std::bitset<8>numb(number);
return numb.to_string();
}
std::string Display16(int number){
std::bitset<16>numb(number);
return numb.to_string();
}
bool OnUserCreate() override bool OnUserCreate() override
{ {
//memory[0x200]=0x00; memory[0x200]=0x60;
//memory[0x201]=0xE0; memory[0x201]=0x0A;
memory[0x202]=0x70;
memory[0x203]=0x04;
memory[0x204]=0x12;
memory[0x205]=0x00;
//0x200 program start //0x200 program start
return true; return true;
} }
@ -81,24 +95,24 @@ public:
//DECODE //DECODE
uint8_t nibble1 = opcode>>12; uint8_t nibble1 = opcode>>12;
uint8_t X = reg[opcode>>8&0xF]; uint8_t X = opcode>>8&0xF;
uint8_t Y = reg[opcode>>4&0xF]; uint8_t Y = opcode>>4&0xF;
uint8_t N = opcode&0xF; uint8_t N = opcode&0xF;
uint8_t NN = opcode&0x00FF; uint8_t NN = opcode&0x00FF;
uint16_t NNN = opcode&0x0FFF; uint16_t NNN = opcode&0x0FFF;
std::cout<<"Opcode 0x"<<std::hex<<opcode<<std::dec<<": "<<Display8(nibble1)<<", "<<Display8(X)<<"/"<<Display8(Y)<<"/"<<Display8(N)<<"/"<<Display8(NN)<<"/"<<Display16(NNN)<<std::endl;
switch(nibble1){ switch(nibble1){
case 0x0:{ case 0x0:{
switch (NNN){ switch (NNN){
case 0x0E0:{ //Clear screen. case 0x0E0:{ //Clear screen.
std::cout<<"Screen has been cleared."<<std::endl;
for (int i=0;i<display.size();i++){ for (int i=0;i<display.size();i++){
display[i]=0; display[i]=0;
} }
}break; }break;
} }
}break; }break;
case 0x1:{ case 0x1:{ //Jump.
pc=NNN;
}break; }break;
case 0x2:{ case 0x2:{
@ -112,11 +126,13 @@ public:
case 0x5:{ case 0x5:{
}break; }break;
case 0x6:{ case 0x6:{ //Set the register X to NN.
reg[X]=NN;
std::cout<<(int)reg[X]<<std::endl;
}break; }break;
case 0x7:{ case 0x7:{ //Add w/no carry
reg[X]+=NN;
std::cout<<(int)reg[X]<<std::endl;
}break; }break;
case 0x8:{ case 0x8:{