public static string RenderOpCode(AddressSpace addrSpace, ushort PC)
{
var num_operands = GetInstructionLength(addrSpace, PC) - 1;
var PC1 = (ushort)(PC + 1);
string addrmodeStr;
switch (AddressingModeMatrix[addrSpace[PC]])
{
case a.REL:
addrmodeStr = String.Format("${0:x4}", (ushort)(PC + (sbyte)(addrSpace[PC1]) + 2));
break;
case a.ZPG:
case a.ABS:
addrmodeStr = RenderEA(addrSpace, PC1, num_operands);
break;
case a.ZPX:
case a.ABX:
addrmodeStr = RenderEA(addrSpace, PC1, num_operands) + ",X";
break;
case a.ZPY:
case a.ABY:
addrmodeStr = RenderEA(addrSpace, PC1, num_operands) + ",Y";
break;
case a.IDX:
addrmodeStr = "(" + RenderEA(addrSpace, PC1, num_operands) + ",X)";
break;
case a.IDY:
addrmodeStr = "(" + RenderEA(addrSpace, PC1, num_operands) + "),Y";
break;
case a.IND:
addrmodeStr = "(" + RenderEA(addrSpace, PC1, num_operands) + ")";
break;
case a.IMM:
addrmodeStr = "#" + RenderEA(addrSpace, PC1, num_operands);
break;
default:
// a.IMP, a.ACC
addrmodeStr = string.Empty;
break;
}
return(string.Format("{0} {1}", MnemonicMatrix[addrSpace[PC]], addrmodeStr));
}
public static string RenderOpCode(AddressSpace addrSpace, ushort PC)
{
var num_operands = GetInstructionLength(addrSpace, PC) - 1;
var PC1 = (ushort)(PC + 1);
string addrmodeStr = (AddressingModeMatrix[addrSpace[PC]]) switch
{
a.REL => $"${(ushort)(PC + (sbyte)addrSpace[PC1] + 2):x4}",
a.ZPG or a.ABS => RenderEA(addrSpace, PC1, num_operands),
a.ZPX or a.ABX => RenderEA(addrSpace, PC1, num_operands) + ",X",
a.ZPY or a.ABY => RenderEA(addrSpace, PC1, num_operands) + ",Y",
a.IDX => "(" + RenderEA(addrSpace, PC1, num_operands) + ",X)",
a.IDY => "(" + RenderEA(addrSpace, PC1, num_operands) + "),Y",
a.IND => "(" + RenderEA(addrSpace, PC1, num_operands) + ")",
a.IMM => "#" + RenderEA(addrSpace, PC1, num_operands),
_ => string.Empty, // a.IMP, a.ACC
};
return($"{MnemonicMatrix[addrSpace[PC]]} {addrmodeStr}");
}
public Machine7800(Cart cart, Bios7800 bios, HSC7800 hsc, ILogger logger, int scanlines, int startl, int fHZ, int sRate, ReadOnlyMemory <uint> p)
: base(logger, scanlines, startl, fHZ, sRate, p, 320)
{
Mem = new AddressSpace(this, 16, 6); // 7800: 16bit, 64byte pages
CPU = new M6502(this, 4);
Maria = new Maria(this, scanlines);
Mem.Map(0x0000, 0x0040, Maria);
Mem.Map(0x0100, 0x0040, Maria);
Mem.Map(0x0200, 0x0040, Maria);
Mem.Map(0x0300, 0x0040, Maria);
PIA = new PIA(this);
Mem.Map(0x0280, 0x0080, PIA);
Mem.Map(0x0480, 0x0080, PIA);
Mem.Map(0x0580, 0x0080, PIA);
RAM1 = new RAM6116();
RAM2 = new RAM6116();
Mem.Map(0x1800, 0x0800, RAM1);
Mem.Map(0x2000, 0x0800, RAM2);
Mem.Map(0x0040, 0x00c0, RAM2); // page 0 shadow
Mem.Map(0x0140, 0x00c0, RAM2); // page 1 shadow
Mem.Map(0x2800, 0x0800, RAM2); // shadow1
Mem.Map(0x3000, 0x0800, RAM2); // shadow2
Mem.Map(0x3800, 0x0800, RAM2); // shadow3
BIOS = bios;
HSC = hsc;
if (HSC != HSC7800.Default)
{
Mem.Map(0x1000, 0x800, HSC.SRAM);
Mem.Map(0x3000, 0x1000, HSC);
Logger.WriteLine("7800 Highscore Cartridge Installed");
}
Cart = cart;
Mem.Map(0x4000, 0xc000, Cart);
}
static int GetInstructionLength(AddressSpace addrSpace, ushort PC)
{
switch (AddressingModeMatrix[addrSpace[PC]])
{
case a.ACC:
case a.IMP:
return(1);
case a.REL:
case a.ZPG:
case a.ZPX:
case a.ZPY:
case a.IDX:
case a.IDY:
case a.IMM:
return(2);
default:
return(3);
}
}
public Machine2600(Cart cart, ILogger logger, int slines, int startl, int fHZ, int sRate, ReadOnlyMemory <uint> p)
: base(logger, slines, startl, fHZ, sRate, p, 160)
{
Mem = new AddressSpace(this, 13, 6); // 2600: 13bit, 64byte pages
CPU = new M6502(this, 1);
TIA = new TIA(this);
for (ushort i = 0; i < 0x1000; i += 0x100)
{
Mem.Map(i, 0x0080, TIA);
}
PIA = new PIA(this);
for (ushort i = 0x0080; i < 0x1000; i += 0x100)
{
Mem.Map(i, 0x0080, PIA);
}
Cart = cart;
Mem.Map(0x1000, 0x1000, Cart);
}
public static string MemDump(AddressSpace addrSpace, ushort atAddr, ushort untilAddr)
{
var dSB = new StringBuilder();
var len = untilAddr - atAddr;
while (len-- >= 0)
{
dSB.Append($"{atAddr:x4}: ");
for (var i = 0; i < 8; i++)
{
dSB.Append($"{addrSpace[atAddr++]:x2} ");
if (i == 3)
{
dSB.Append(' ');
}
}
dSB.Append('\n');
}
if (dSB.Length > 0)
{
dSB.Length--; // Trim trailing newline
}
return(dSB.ToString());
}
public AddressSpace ReadAddressSpace(MachineBase m, int addrSpaceShift, int pageShift)
{
var addressSpace = new AddressSpace(this, m, addrSpaceShift, pageShift);
return addressSpace;
}
public AddressSpace ReadAddressSpace(MachineBase m, int addrSpaceShift, int pageShift)
{
var addressSpace = new AddressSpace(this, m, addrSpaceShift, pageShift);
return(addressSpace);
}
public void Write(AddressSpace mem)
{
mem.GetObjectData(this);
}
static int GetInstructionLength(AddressSpace addrSpace, ushort PC)
=> (AddressingModeMatrix[addrSpace[PC]]) switch
{
static string RenderEA(AddressSpace addrSpace, ushort PC, int bytes)
{
var lsb = addrSpace[PC];
var msb = (bytes == 2) ? addrSpace[(ushort)(PC + 1)] : (byte)0;
var ea = (ushort)(lsb | (msb << 8));
return string.Format((bytes == 1) ? "${0:x2}" : "${0:x4}", ea);
}
static int GetInstructionLength(AddressSpace addrSpace, ushort PC)
{
switch (AddressingModeMatrix[addrSpace[PC]])
{
case a.ACC:
case a.IMP:
return 1;
case a.REL:
case a.ZPG:
case a.ZPX:
case a.ZPY:
case a.IDX:
case a.IDY:
case a.IMM:
return 2;
default:
return 3;
}
}
public static string RenderOpCode(AddressSpace addrSpace, ushort PC)
{
var num_operands = GetInstructionLength(addrSpace, PC) - 1;
var PC1 = (ushort)(PC + 1);
string addrmodeStr;
switch (AddressingModeMatrix[addrSpace[PC]])
{
case a.REL:
addrmodeStr = String.Format("${0:x4}", (ushort)(PC + (sbyte)(addrSpace[PC1]) + 2));
break;
case a.ZPG:
case a.ABS:
addrmodeStr = RenderEA(addrSpace, PC1, num_operands);
break;
case a.ZPX:
case a.ABX:
addrmodeStr = RenderEA(addrSpace, PC1, num_operands) + ",X";
break;
case a.ZPY:
case a.ABY:
addrmodeStr = RenderEA(addrSpace, PC1, num_operands) + ",Y";
break;
case a.IDX:
addrmodeStr = "(" + RenderEA(addrSpace, PC1, num_operands) + ",X)";
break;
case a.IDY:
addrmodeStr = "(" + RenderEA(addrSpace, PC1, num_operands) + "),Y";
break;
case a.IND:
addrmodeStr = "(" + RenderEA(addrSpace, PC1, num_operands) + ")";
break;
case a.IMM:
addrmodeStr = "#" + RenderEA(addrSpace, PC1, num_operands);
break;
default:
// a.IMP, a.ACC
addrmodeStr = string.Empty;
break;
}
return string.Format("{0} {1}", MnemonicMatrix[addrSpace[PC]], addrmodeStr);
}
public static string MemDump(AddressSpace addrSpace, ushort atAddr, ushort untilAddr)
{
var dSB = new StringBuilder();
var len = untilAddr - atAddr;
while (len-- >= 0)
{
dSB.AppendFormat("{0:x4}: ", atAddr);
for (var i = 0; i < 8; i++)
{
dSB.AppendFormat("{0:x2} ", addrSpace[atAddr++]);
if (i == 3)
{
dSB.Append(" ");
}
}
dSB.Append("\n");
}
if (dSB.Length > 0)
{
dSB.Length--; // Trim trailing newline
}
return dSB.ToString();
}
public static string Disassemble(AddressSpace addrSpace, ushort atAddr, ushort untilAddr)
{
var dSB = new StringBuilder();
var dPC = atAddr;
while (atAddr < untilAddr)
{
dSB.AppendFormat("{0:x4}: ", dPC);
var len = GetInstructionLength(addrSpace, dPC);
for (var i = 0; i < 3; i++)
{
if (i < len)
{
dSB.AppendFormat("{0:x2} ", addrSpace[atAddr++]);
}
else
{
dSB.Append(" ");
}
}
dSB.AppendFormat("{0,-15}{1}", RenderOpCode(addrSpace, dPC), Environment.NewLine);
dPC += (ushort)len;
}
if (dSB.Length > 0)
{
dSB.Length--; // Trim trailing newline
}
return dSB.ToString();
}
public void Write(AddressSpace mem)
{
mem.GetObjectData(this);
}