| private DisassembleXSG ( string name, ushort operand, ushort nextword, ushort address, bool showMemoryContents, ushort &instructionSize ) : string | ||
| name | string | |
| operand | ushort | |
| nextword | ushort | |
| address | ushort | |
| showMemoryContents | bool | |
| instructionSize | ushort | |
| return | string | |
private string DisassembleXSG(string name, ushort operand, ushort nextword, ushort address, bool showMemoryContents, out ushort instructionSize)
{
instructionSize = 2;
bool push = (operand & 0x0100) != 0;
int register = (operand & 0x0E00) >> 9;
bool user = (operand & 0x8000) != 0;
name = push ? "SSG" : "LSG";
string reg;
switch ((SegmentIndex)register) {
case SegmentIndex.CS:
reg = user ? "CSU" : "CSS";
break;
case SegmentIndex.DS:
reg = user ? "DSU" : "DSS";
break;
case SegmentIndex.ES:
reg = user ? "ESU" : "ESS";
break;
case SegmentIndex.SS:
reg = user ? "SSU" : "SSS";
break;
case SegmentIndex.IS:
reg = user ? "???" : "IS";
break;
default:
// operand does not include a valid segment index.
reg = "???";
break;
}
return $"{name,-8}{reg}";
}
