private void LoadAndRun()
{
string fileName = vm.PhysicalMemory.GetString(vm.Processor.DS, (ushort)vm.Processor.DX, 256, 0);
var filePath = new VirtualPath(fileName);
var program = ProgramImage.Load(fileName, this.vm);
if (vm.Processor.ES == 0)
{
LoadImage(program);
}
else
{
ushort envSegment = vm.PhysicalMemory.GetUInt16(vm.Processor.ES, (ushort)vm.Processor.BX);
ushort cmdLineOffset = vm.PhysicalMemory.GetUInt16(vm.Processor.ES, (ushort)vm.Processor.BX + 2u);
ushort cmdLineSegment = vm.PhysicalMemory.GetUInt16(vm.Processor.ES, (ushort)vm.Processor.BX + 4u);
string cmdLineArgs = null;
if (cmdLineSegment != 0)
{
int count = vm.PhysicalMemory.GetByte(cmdLineSegment, cmdLineOffset);
if (count > 0)
{
cmdLineArgs = vm.PhysicalMemory.GetString(cmdLineSegment, cmdLineOffset + 1u, count);
}
}
LoadImage(program, envSegment, cmdLineArgs);
}
}
private void LoadOverlay()
{
string fileName = vm.PhysicalMemory.GetString(vm.Processor.DS, (ushort)vm.Processor.DX, 256, 0);
var program = ProgramImage.Load(fileName, vm);
if (!(program is ExeFile))
{
throw new InvalidOperationException();
}
ushort overlaySegment = vm.PhysicalMemory.GetUInt16(vm.Processor.ES, (ushort)vm.Processor.BX);
short relocationFactor = (short)vm.PhysicalMemory.GetUInt16(vm.Processor.ES, (ushort)vm.Processor.BX + 2u);
program.LoadOverlay(vm, overlaySegment, relocationFactor);
}