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BizHawk/BizHawk.Emulation/Consoles/Calculator/TI83.cs

611 lines
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C#
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using System;
using System.Globalization;
using System.IO;
using System.Collections.Generic;
using BizHawk.Emulation.CPUs.Z80;
//http://www.ticalc.org/pub/text/calcinfo/
namespace BizHawk.Emulation.Consoles.Calculator
{
public class TI83 : IEmulator
{
//hardware
Z80A cpu = new Z80A();
byte[] rom;
byte[] ram;
int romPageLow3Bits;
int romPageHighBit;
bool maskOn;
bool onPressed = false;
int keyboardMask;
int disp_mode;
int disp_move;
uint disp_x, disp_y;
int m_LinkOutput, m_LinkState;
bool m_CursorMoved;
//-------
public byte ReadMemory(ushort addr)
{
byte ret;
int romPage = romPageLow3Bits | (romPageHighBit << 3);
//Console.WriteLine("read memory: {0:X4}", addr);
if (addr < 0x4000)
ret = rom[addr]; //ROM zero-page
else if (addr < 0x8000)
ret = rom[romPage * 0x4000 + addr - 0x4000]; //other rom page
else ret = ram[addr - 0x8000];
if (CoreComm.MemoryCallbackSystem.HasRead)
{
CoreComm.MemoryCallbackSystem.TriggerRead(addr);
}
return ret;
}
public void WriteMemory(ushort addr, byte value)
{
if (addr < 0x4000)
return; //ROM zero-page
else if (addr < 0x8000)
return; //other rom page
else ram[addr - 0x8000] = value;
if (CoreComm.MemoryCallbackSystem.HasWrite)
{
CoreComm.MemoryCallbackSystem.TriggerWrite(addr);
}
}
public void WriteHardware(ushort addr, byte value)
{
switch (addr)
{
case 0: //PORT_LINK
romPageHighBit = (value >> 4) & 1;
m_LinkOutput = value & 3;
m_LinkState = m_LinkOutput ^ 3;
break;
case 1: //PORT_KEYBOARD:
lagged = false;
keyboardMask = value;
//Console.WriteLine("write PORT_KEYBOARD {0:X2}",value);
break;
case 2: //PORT_ROMPAGE
romPageLow3Bits = value & 0x7;
break;
case 3: //PORT_STATUS
maskOn = ((value & 1) == 1);
break;
case 16: //PORT_DISPCTRL
//Console.WriteLine("write PORT_DISPCTRL {0}",value);
WriteDispCtrl(value);
break;
case 17: //PORT_DISPDATA
//Console.WriteLine("write PORT_DISPDATA {0}",value);
WriteDispData(value);
break;
}
}
public byte ReadHardware(ushort addr)
{
switch (addr)
{
case 0: //PORT_LINK
return (byte)((romPageHighBit << 4) | (m_LinkState << 2) | m_LinkOutput);
case 1: //PORT_KEYBOARD:
//Console.WriteLine("read PORT_KEYBOARD");
return ReadKeyboard();
case 2: //PORT_ROMPAGE
return (byte)romPageLow3Bits;
case 3: //PORT_STATUS
{
//Console.WriteLine("read PORT_STATUS");
byte ret = 0;
// Bits:
// 0 - Set if ON key is down and ON key is trapped
// 1 - Update things (keyboard etc)
// 2 - Unknown, but used
// 3 - Set if ON key is up
// 4-7 - Unknown
//if (onPressed && maskOn) ret |= 1;
//if (!onPressed) ret |= 0x8;
ret |= 0x8; //on key is up
ret |= 0x2; //link isnt emulated
return ret;
}
case 4: //PORT_INTCTRL
//Console.WriteLine("read PORT_INTCTRL");
return 0xFF;
case 16: //PORT_DISPCTRL
//Console.WriteLine("read DISPCTRL");
break;
case 17: //PORT_DISPDATA
return ReadDispData();
}
return 0xFF;
}
byte ReadKeyboard()
{
if (CoreComm.InputCallback != null) CoreComm.InputCallback();
//ref TI-9X
int ret = 0xFF;
//Console.WriteLine("keyboardMask: {0:X2}",keyboardMask);
if ((keyboardMask & 1) == 0)
{
if (Controller.IsPressed("DOWN")) ret ^= 1;
if (Controller.IsPressed("LEFT")) ret ^= 2;
if (Controller.IsPressed("RIGHT")) ret ^= 4;
if (Controller.IsPressed("UP")) ret ^= 8;
}
if ((keyboardMask & 2) == 0)
{
if (Controller.IsPressed("ENTER")) ret ^= 1;
if (Controller.IsPressed("PLUS")) ret ^= 2;
if (Controller.IsPressed("MINUS")) ret ^= 4;
if (Controller.IsPressed("MULTIPLY")) ret ^= 8;
if (Controller.IsPressed("DIVIDE")) ret ^= 16;
if (Controller.IsPressed("EXP")) ret ^= 32;
if (Controller.IsPressed("CLEAR")) ret ^= 64;
}
if ((keyboardMask & 4) == 0)
{
if (Controller.IsPressed("DASH")) ret ^= 1;
if (Controller.IsPressed("3")) ret ^= 2;
if (Controller.IsPressed("6")) ret ^= 4;
if (Controller.IsPressed("9")) ret ^= 8;
if (Controller.IsPressed("PARACLOSE")) ret ^= 16;
if (Controller.IsPressed("TAN")) ret ^= 32;
if (Controller.IsPressed("VARS")) ret ^= 64;
}
if ((keyboardMask & 8) == 0)
{
if (Controller.IsPressed("DOT")) ret ^= 1;
if (Controller.IsPressed("2")) ret ^= 2;
if (Controller.IsPressed("5")) ret ^= 4;
if (Controller.IsPressed("8")) ret ^= 8;
if (Controller.IsPressed("PARAOPEN")) ret ^= 16;
if (Controller.IsPressed("COS")) ret ^= 32;
if (Controller.IsPressed("PRGM")) ret ^= 64;
if (Controller.IsPressed("STAT")) ret ^= 128;
}
if ((keyboardMask & 16) == 0)
{
if (Controller.IsPressed("0")) ret ^= 1;
if (Controller.IsPressed("1")) ret ^= 2;
if (Controller.IsPressed("4")) ret ^= 4;
if (Controller.IsPressed("7")) ret ^= 8;
if (Controller.IsPressed("COMMA")) ret ^= 16;
if (Controller.IsPressed("SIN")) ret ^= 32;
if (Controller.IsPressed("MATRIX")) ret ^= 64;
if (Controller.IsPressed("X")) ret ^= 128;
}
if ((keyboardMask & 32) == 0)
{
if (Controller.IsPressed("STO")) ret ^= 2;
if (Controller.IsPressed("LN")) ret ^= 4;
if (Controller.IsPressed("LOG")) ret ^= 8;
if (Controller.IsPressed("SQUARED")) ret ^= 16;
if (Controller.IsPressed("NEG1")) ret ^= 32;
if (Controller.IsPressed("MATH"))
ret ^= 64;
if (Controller.IsPressed("ALPHA")) ret ^= 128;
}
if ((keyboardMask & 64) == 0)
{
if (Controller.IsPressed("GRAPH")) ret ^= 1;
if (Controller.IsPressed("TRACE")) ret ^= 2;
if (Controller.IsPressed("ZOOM")) ret ^= 4;
if (Controller.IsPressed("WINDOW")) ret ^= 8;
if (Controller.IsPressed("Y")) ret ^= 16;
if (Controller.IsPressed("2ND")) ret ^= 32;
if (Controller.IsPressed("MODE")) ret ^= 64;
if (Controller.IsPressed("DEL")) ret ^= 128;
}
return (byte)ret;
}
byte ReadDispData()
{
if (m_CursorMoved)
{
m_CursorMoved = false;
return 0x00; //not accurate this should be stale data or something
}
byte ret;
if (disp_mode == 1)
{
ret = vram[disp_y * 12 + disp_x];
}
else
{
int column = 6 * (int)disp_x;
int offset = (int)disp_y * 12 + (column >> 3);
int shift = 10 - (column & 7);
ret = (byte)(((vram[offset] << 8) | vram[offset + 1]) >> shift);
}
doDispMove();
return ret;
}
void WriteDispData(byte value)
{
int offset = -1;
if (disp_mode == 1)
{
offset = (int)disp_y * 12 + (int)disp_x;
vram[offset] = value;
}
else
{
int column = 6 * (int)disp_x;
offset = (int)disp_y * 12 + (column >> 3);
if (offset < 0x300)
{
int shift = column & 7;
int mask = ~(252 >> shift);
int Data = value << 2;
vram[offset] = (byte)(vram[offset] & mask | (Data >> shift));
if (shift > 2 && offset < 0x2ff)
{
offset++;
shift = 8 - shift;
mask = ~(252 << shift);
vram[offset] = (byte)(vram[offset] & mask | (Data << shift));
}
}
}
doDispMove();
}
void doDispMove()
{
switch (disp_move)
{
case 0: disp_y--; break;
case 1: disp_y++; break;
case 2: disp_x--; break;
case 3: disp_x++; break;
}
disp_x &= 0xF; //0xF or 0x1F? dunno
disp_y &= 0x3F;
}
void WriteDispCtrl(byte value)
{
if (value <= 1)
disp_mode = value;
else if (value >= 4 && value <= 7)
disp_move = value - 4;
else if ((value & 0xC0) == 0x40)
{
//hardware scroll
}
else if ((value & 0xE0) == 0x20)
{
disp_x = (uint)(value & 0x1F);
m_CursorMoved = true;
}
else if ((value & 0xC0) == 0x80)
{
disp_y = (uint)(value & 0x3F);
m_CursorMoved = true;
}
else if ((value & 0xC0) == 0xC0)
{
//contrast
}
else if (value == 2)
{
}
else if (value == 3)
{
}
else
{
}
}
public TI83(CoreComm comm, GameInfo game, byte[] rom)
{
CoreComm = comm;
cpu.ReadMemory = ReadMemory;
cpu.WriteMemory = WriteMemory;
cpu.ReadHardware = ReadHardware;
cpu.WriteHardware = WriteHardware;
cpu.IRQCallback = IRQCallback;
cpu.NMICallback = NMICallback;
this.rom = rom;
//different calculators (different revisions?) have different initPC. we track this in the game database by rom hash
//if( *(unsigned long *)(m_pRom + 0x6ce) == 0x04D3163E ) m_Regs.PC.W = 0x6ce; //KNOWN
//else if( *(unsigned long *)(m_pRom + 0x6f6) == 0x04D3163E ) m_Regs.PC.W = 0x6f6; //UNKNOWN
if (game["initPC"])
startPC = ushort.Parse(game.OptionValue("initPC"), NumberStyles.HexNumber);
HardReset();
SetupMemoryDomains();
}
void IRQCallback()
{
//Console.WriteLine("IRQ with vec {0} and cpu.InterruptMode {1}", cpu.RegisterI, cpu.InterruptMode);
cpu.Interrupt = false;
}
void NMICallback()
{
Console.WriteLine("NMI");
cpu.NonMaskableInterrupt = false;
}
public CoreComm CoreComm { get; private set; }
protected byte[] vram = new byte[0x300];
class MyVideoProvider : IVideoProvider
{
TI83 emu;
public MyVideoProvider(TI83 emu)
{
this.emu = emu;
}
public int[] GetVideoBuffer()
{
//unflatten bit buffer
int[] pixels = new int[96 * 64];
int i = 0;
for (int y = 0; y < 64; y++)
for (int x = 0; x < 96; x++)
{
int offset = y * 96 + x;
int bufbyte = offset >> 3;
int bufbit = offset & 7;
int bit = ((emu.vram[bufbyte] >> (7 - bufbit)) & 1);
if (bit == 0)
unchecked { pixels[i++] = (int)0xFFFFFFFF; }
else
pixels[i++] = 0;
}
return pixels;
}
public int VirtualWidth { get { return 96; } }
public int BufferWidth { get { return 96; } }
public int BufferHeight { get { return 64; } }
public int BackgroundColor { get { return 0; } }
}
public IVideoProvider VideoProvider {
get { return new MyVideoProvider(this); } }
public ISoundProvider SoundProvider { get { return NullSound.SilenceProvider; } }
public ISyncSoundProvider SyncSoundProvider { get { return new FakeSyncSound(NullSound.SilenceProvider, 735); } }
public bool StartAsyncSound() { return true; }
public void EndAsyncSound() { }
public static readonly ControllerDefinition TI83Controller =
new ControllerDefinition
{
Name = "TI83 Controller",
BoolButtons = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9","DOT",
"ON","ENTER",
"DOWN","LEFT","UP","RIGHT",
"PLUS","MINUS","MULTIPLY","DIVIDE",
"CLEAR", "EXP", "DASH", "PARACLOSE", "TAN", "VARS", "PARAOPEN",
"COS", "PRGM", "STAT", "COMMA", "SIN", "MATRIX", "X",
"STO", "LN", "LOG", "SQUARED", "NEG1", "MATH", "ALPHA",
"GRAPH", "TRACE", "ZOOM", "WINDOW", "Y", "2ND", "MODE", "DEL"
}
};
public ControllerDefinition ControllerDefinition { get { return TI83Controller; } }
IController controller;
public IController Controller
{
get { return controller; }
set { controller = value; }
}
//configuration
ushort startPC;
public void FrameAdvance(bool render, bool rendersound)
{
lagged = true;
//I eyeballed this speed
for (int i = 0; i < 5; i++)
{
onPressed = Controller.IsPressed("ON");
//and this was derived from other emus
cpu.ExecuteCycles(10000);
cpu.Interrupt = true;
}
Controller.UpdateControls(Frame++);
if (lagged)
{
_lagcount++;
islag = true;
}
else
islag = false;
}
public void HardReset()
{
cpu.Reset();
ram = new byte[0x8000];
for (int i = 0; i < 0x8000; i++)
ram[i] = 0xFF;
cpu.RegisterPC = startPC;
cpu.IFF1 = false;
cpu.IFF2 = false;
cpu.InterruptMode = 2;
maskOn = false;
romPageHighBit = 0;
romPageLow3Bits = 0;
keyboardMask = 0;
disp_mode = 0;
disp_move = 0;
disp_x = disp_y = 0;
}
private int _lagcount = 0;
private bool lagged = true;
private bool islag = false;
public int Frame { get; set; }
public void ResetFrameCounter()
{
Frame = 0;
_lagcount = 0;
islag = false;
}
public int LagCount { get { return _lagcount; } set { _lagcount = value; } }
public bool IsLagFrame { get { return islag; } }
public bool DeterministicEmulation { get { return true; } }
public byte[] ReadSaveRam() { return null; }
public void StoreSaveRam(byte[] data) { }
public void ClearSaveRam() { }
public bool SaveRamModified
{
get { return false; }
set { }
}
public void SaveStateText(TextWriter writer)
{
writer.WriteLine("[TI83]\n");
writer.WriteLine("Frame {0}", Frame);
cpu.SaveStateText(writer);
writer.Write("RAM ");
ram.SaveAsHex(writer);
writer.WriteLine("romPageLow3Bits {0}", romPageLow3Bits);
writer.WriteLine("romPageHighBit {0}", romPageHighBit);
writer.WriteLine("disp_mode {0}", disp_mode);
writer.WriteLine("disp_move {0}", disp_move);
writer.WriteLine("disp_x {0}", disp_x);
writer.WriteLine("disp_y {0}", disp_y);
writer.WriteLine("m_CursorMoved {0}", m_CursorMoved);
writer.WriteLine("maskOn {0}", maskOn);
writer.WriteLine("onPressed {0}", onPressed);
writer.WriteLine("keyboardMask {0}", keyboardMask);
writer.WriteLine("m_LinkOutput {0}", m_LinkOutput);
writer.WriteLine("m_LinkState {0}", m_LinkState);
writer.WriteLine("lag {0}", _lagcount);
writer.WriteLine("islag {0}", islag);
writer.WriteLine("vram {0}", Util.BytesToHexString(vram));
writer.WriteLine("[/TI83]");
}
public void LoadStateText(TextReader reader)
{
while (true)
{
string[] args = reader.ReadLine().Split(' ');
if (args[0].Trim() == "") continue;
if (args[0] == "[TI83]") continue;
if (args[0] == "[/TI83]") break;
if (args[0] == "Frame")
Frame = int.Parse(args[1]);
else if (args[0] == "[Z80]")
cpu.LoadStateText(reader);
else if (args[0] == "RAM")
ram.ReadFromHex(args[1]);
else if (args[0] == "romPageLow3Bits")
romPageLow3Bits = int.Parse(args[1]);
else if (args[0] == "romPageHighBit")
romPageHighBit = int.Parse(args[1]);
else if (args[0] == "disp_mode")
disp_mode = int.Parse(args[1]);
else if (args[0] == "disp_move")
disp_move = int.Parse(args[1]);
else if (args[0] == "disp_x")
disp_x = uint.Parse(args[1]);
else if (args[0] == "disp_y")
disp_y = uint.Parse(args[1]);
else if (args[0] == "m_CursorMoved")
m_CursorMoved = bool.Parse(args[1]);
else if (args[0] == "maskOn")
maskOn = bool.Parse(args[1]);
else if (args[0] == "onPressed")
onPressed = bool.Parse(args[1]);
else if (args[0] == "keyboardMask")
keyboardMask = int.Parse(args[1]);
else if (args[0] == "m_LinkOutput")
m_LinkOutput = int.Parse(args[1]);
else if (args[0] == "m_LinkState")
m_LinkState = int.Parse(args[1]);
else if (args[0] == "lag")
_lagcount = int.Parse(args[1]);
else if (args[0] == "islag")
islag = bool.Parse(args[1]);
else if (args[0] == "vram")
vram = Util.HexStringToBytes(args[1]);
else
Console.WriteLine("Skipping unrecognized identifier " + args[0]);
}
}
public void SaveStateBinary(BinaryWriter writer)
{
}
public void LoadStateBinary(BinaryReader reader)
{
}
public byte[] SaveStateBinary()
{
return new byte[0];
}
public string SystemId { get { return "TI83"; } }
private IList<MemoryDomain> memoryDomains;
private const ushort RamSizeMask = 0x7FFF;
private void SetupMemoryDomains()
{
var domains = new List<MemoryDomain>();
var MainMemoryDomain = new MemoryDomain("Main RAM", ram.Length, Endian.Little,
addr => ram[addr & RamSizeMask],
(addr, value) => ram[addr & RamSizeMask] = value);
domains.Add(MainMemoryDomain);
memoryDomains = domains.AsReadOnly();
}
public IList<MemoryDomain> MemoryDomains { get { return memoryDomains; } }
public MemoryDomain MainMemory { get { return memoryDomains[0]; } }
public void Dispose() { }
}
}
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