toptensoftware

public byte ReadByte(ushort seg, ushort offset)
{
    return memory[(seg << 4) + offset];
}

toptensoftware

class Selector
{
    public byte[] memory;
}

Selector[] _selectorTable;

public byte ReadByte(ushort seg, ushort offset)
{
    var sel = _selectorTable[seg >> 3];

toptensoftware

class Selector
{
    public byte[] memory;
    bool writable;
}

Selector[] _selectorTable;

public void WriteByte(ushort seg, ushort offset, byte value)
{

toptensoftware

public interface IBus
{
    byte ReadByte(ushort seg, ushort offset);
    void WriteByte(ushort seg, ushort offset, byte value);
    ushort ReadPortWord(ushort port);
    void WritePortWord(ushort port, ushort value);
    bool IsExecutableSelector(ushort seg);
}

toptensoftware

        [TestMethod]
        public void Adc_Eb_Gb()
        {
            WriteByte(0, 100, 40);
            FlagC = true;
            al = 20;
            emit("adc byte [100], al");
            run();
            Assert.AreEqual(ReadByte(0, 100), 61);
        }

toptensoftware

// Create a CPU
_cpu = new CPU();

// Setup the memory bus
_cpu.Bus = _memoryHeap;

// Setup some registers
_cpu.cs = 0x10;
_cpu.ip = 0x100;
_cpu.ax = whatever;

toptensoftware

// NeFileReader - opens a 16-bit "NE" file
public class NeFileReader : IDisposable
{
    // Constructor, throws exception if error, keeps file open, call IDispose to close
    public NeFileReader(string filename);

    // Name of currently open file
    public string FileName { get; }

    // Name of the module extract from name table

toptensoftware

MODULE DUMP: C:\Users\brad\Dropbox\Win16\Games2\WEPUTIL.DLL
App Flags: FullScreeen | WinPMCompat | DLL
Auto Data Segment: 3
CS:IP: 0001:19D2
SS:SP: 0000:0000
Stack Size: 0x0000

Imported Name Table:
    1: KERNEL
    8: GDI

toptensoftware

File Map:
00000000 - 0000003E [003E] MZ Header
0000003E - 00000080 [0042] -
00000080 - 000000C0 [0040] NE Header
000000C0 - 000000D8 [0018] Segment Table
000000D8 - 000001AB [00D3] Resource table
000001AB - 000001AC [0001] -
000001AC - 000001BD [0011] Resident name table
000001BD - 0000029C [00DF] -
0000029C - 000003FB [015F] Non-resident name table

toptensoftware

// Allocation represents the actual memory behind one or more selectors
public class Allocation
{
    public Allocation(uint bytes, ushort flags)
    {
        this.flags = flags;
        buffer = new byte[bytes];
    }
    public ushort flags;            // GlobalAlloc flags
    public byte[] buffer;           // The actual "memory"!