int main(int argc, char* argv[])
{
mos6502 cpu(MemoryRead, MemoryWrite);
disasm dasm;
int SPEED = 100; // %
int CPUFREQ = 1000000; // Hz - CPU clock frequency
bool HALT = false;
// Todo optimize this string buffer size?
char str[400];
if (argc < 2)
{
std::cout << "Filename required!" << std::endl;
return 0;
}
if (rom.loadFromFile(argv[1]) == 0)
{
std::cout << "Rom invalid!" << std::endl;
}
std::string caption("CBS6000 Emulator - (C)2015 Koen van Vliet");
sf::RenderWindow window(sf::VideoMode(WINDOW_WIDTH, WINDOW_HEIGHT), caption);
sf::RenderWindow dbgwindow(sf::VideoMode(DBGWINDOW_WIDTH, DBGWINDOW_HEIGHT), caption);
sf::RenderWindow zpwindow(sf::VideoMode(ZPWINDOW_WIDTH, ZPWINDOW_HEIGHT), caption);
window.setFramerateLimit(FPS);
dbgwindow.setFramerateLimit(FPS);
zpwindow.setFramerateLimit(FPS);
if (!term.load("terminal8x16.png",8,16))
{
std::cout << "Failed to open bitmap font file!" << std::endl;
return 0;
}
if (!dbgterm.load("terminal8x16.png",8,16))
{
std::cout << "Failed to open bitmap font file!" << std::endl;
return 0;
}
if (!dasmterm.load("terminal8x16.png",8,16))
{
std::cout << "Failed to open bitmap font file!" << std::endl;
return 0;
}
if (!regterm.load("terminal8x16.png",8,16))
{
std::cout << "Failed to open bitmap font file!" << std::endl;
return 0;
}
if (!zpterm.load("terminal8x16.png",8,16))
{
std::cout << "Failed to open bitmap font file!" << std::endl;
return 0;
}
int ctile = 177;
term.setCursorTile(ctile);
dbgterm.setCursorTile(ctile);
dbgterm.enableCursor(false);
dbgterm.setTextColor(sf::Color::Green);
dasmterm.enableCursor(false);
dasmterm.setTextColor(sf::Color::Cyan);
regterm.enableCursor(false);
regterm.setTextColor(sf::Color::White);
zpterm.enableCursor(false);
zpterm.setTextColor(sf::Color::White);
consoleLog("---[Debug console]---");
consoleLog(versionInfo);
net.init();
consoleLog("Starting CPU emulation");
// Reset Cpu and internal IO port for the 6510
Direction = 0x00;
PortOut = 0x00;
cpu.Reset();
bool SHOWDASM = false;
while(window.isOpen())
{
if (SPEED <= 20)
{
SHOWDASM = true;
}
sf::Event event;
while (window.pollEvent(event))
{
switch (event.type) {
case sf::Event::Closed :
window.close();
break;
case sf::Event::TextEntered:
if (event.text.unicode < 128)
{
char c = (char)event.text.unicode;
term.feedChar(c);
}
break;
case sf::Event::KeyPressed :
// Increase and decrease the CPU speed
if (event.key.code == sf::Keyboard::PageUp)
{
if (SPEED < 500)
{
SPEED += 5;
}
sprintf(str, "%d%% speed", SPEED);
consoleLog(str);
}
if (event.key.code == sf::Keyboard::PageDown)
{
if (SPEED)
{
SPEED -= 5;
if (SPEED < 0)
{
SPEED = 0;
}
sprintf(str, "%d%% speed", SPEED);
consoleLog(str);
}
}
// Stop execution
if (event.key.code == sf::Keyboard::Delete)
{
HALT = true;
SHOWDASM = true;
consoleLog("F8 to continue, F5 to step");
}
// Stop/Resume execution
if (event.key.code == sf::Keyboard::F8)
{
if (HALT)
{
HALT = false;
consoleLog("Resumed execution...");
}
else
{
HALT = true;
SHOWDASM = true;
consoleLog("F8 to continue, F5 to step");
}
}
// Execute single instruction
if (event.key.code == sf::Keyboard::F5)
{
if (HALT)
{
cpu.Run(1);
SHOWDASM = true;
}
}
if (event.key.code == sf::Keyboard::End)
{
// Reset Cpu and internal IO port for the 6510
Direction = 0x00;
PortOut = 0x00;
cpu.Reset();
HALT = false;
consoleLog("Reset CPU");
}
break;
default:
break;
}
}
// Run a bunch of instructions
if(!HALT)
{
int IPF = (CPUFREQ * SPEED) /(FPS * AVG_INSTRUCTION_CYCLES * 100); // Instructions per frame
cpu.Run(IPF);
}
if (SHOWDASM)
{
// Show live disassembly of the memory
SHOWDASM = false;
// Todo fix pc
uint16_t state[6];
uint8_t buff[3];
uint16_t pc;
cpu.GetState(state);
pc = state[3];
for(int i = 0; i< 9; i++)
{
uint pc_prev = pc;
dasmterm.printString("\r\n");
buff[0] = MemoryRead(pc);
buff[1] = MemoryRead(pc+1);
buff[2] = MemoryRead(pc+2);
pc += 1 + dasm.getDisassembly((char*)str, buff, 1, pc_prev);
if(i ==0)
dasmterm.printString(">");
else
dasmterm.printString(" ");
dasmterm.printString(str);
}
// Display CPU register contents
char charA = state[0], charX = state[1], charY = state[2];
if (charA < ' ')
{
charA = ' ';
}
if (charX < ' ')
{
charX = ' ';
}
if (charY < ' ')
{
charY = ' ';
}
sprintf(str,"\r\n"
"A: $%02X %03d \'%c\'\r\n"
"X: $%02X %03d \'%c\'\r\n"
"Y: $%02X %03d \'%c\'\r\n"
"PC: $%04X\r\n"
"SP: $%02X %03d\r\n"
"SR: $%02X, Z: %d, C: %d",
state[0],
state[0],
charA,
state[1],
state[1],
charX,
state[2],
state[2],
charY,
state[3],
state[4],
state[4],
state[5],
(state[5]>>1) & 1,
state[5] & 1);
regterm.printString(str);
// Show zero page contents
zpterm.setTextColor(sf::Color::Cyan);
zpterm.printString("\r\n----: -0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F");
zpterm.setTextColor(sf::Color::White);
for(int i = 0; i < 16; i++)
{
uint8_t d;
zpterm.printString("\r\n");
sprintf(str, "%04X: ", (uint16_t)(i * 16));
zpterm.printString(str);
for(int j = 0; j < 16; j++)
{
d = MemoryRead(i*16 + j);
if (j == 15)
sprintf(str,"%02X",d);
else
sprintf(str,"%02X,",d);
if(i*16 + j >= 0x5C && i*16+j < 0x5C+ 0x27)
zpterm.setTextColor(sf::Color::Green);
zpterm.printString(str);
zpterm.setTextColor(sf::Color::White);
}
for(int j = 0; j < 16; j++)
{
d = MemoryRead(i*16 + j);
if (d < ' ')
{
d = ' ';
}
if(i*16 + j >= 0x5C && i*16+j < 0x5C+ 0x27)
zpterm.setTextColor(sf::Color::Green);
zpterm.Write(d);
zpterm.setTextColor(sf::Color::Blue);
zpterm.Write(ctile);
zpterm.setTextColor(sf::Color::White);
}
zpterm.setTextColor(sf::Color::Blue);
for(int i = 0; i< 86; i++)
zpterm.Write(177);
zpterm.setTextColor(sf::Color::White);
}
}
// Update the screen
window.clear();
dbgwindow.clear();
zpwindow.clear();
net.update();
term.update();
dbgterm.update();
dasmterm.update();
zpterm.update();
regterm.update();
window.draw(term);
dbgwindow.draw(dbgterm);
zpwindow.draw(zpterm);
//if(HALT)
//{
dbgwindow.draw(dasmterm);
dbgwindow.draw(regterm);
//}
window.display();
dbgwindow.display();
zpwindow.display();
}
return 0;
}
