Basilio/js/Registers.ts

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/// <reference path="Byte.ts" />
enum Flags { CARRY, ADDSUB, PARITY, UNUSED1, HALF, UNUSED2, ZERO, SIGN }
class Registers {
public static byteRegisters: Byte[] = [];
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public static shadowRegisters: Word[] = [];
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public static programCounter: Word = new Word(0);
public static stackPointer: Word = new Word(0);
public static Init() {
Registers.byteRegisters["IXH"] = new Byte(0);
Registers.byteRegisters["IXL"] = new Byte(0);
Registers.byteRegisters["IYH"] = new Byte(0);
Registers.byteRegisters["IYL"] = new Byte(0);
var tmp = "ABCDEFHLIR";
for(var i; i < tmp.length; i++)
Registers.byteRegisters[tmp[i]] = new Byte(0);
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Registers.shadowRegisters["AF"] = new Word(0);
Registers.shadowRegisters["BC"] = new Word(0);
Registers.shadowRegisters["DE"] = new Word(0);
Registers.shadowRegisters["HL"] = new Word(0);
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}
public static GenerateWord(high: string, low: string): Word {
return new Word(Registers.byteRegisters[high], Registers.byteRegisters[low]);
}
public static SetFlag(flag: Flags, value: boolean) {
if(flag != Flags.UNUSED1 && flag != Flags.UNUSED2)
Registers.byteRegisters["F"].Bit(flag, value);
}
public static GetFlag(flag: Flags): boolean {
return Registers.byteRegisters["F"].Test(flag);
}
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public static ExchangeAFShadow() {
var tmp = Registers.shadowRegisters["AF"];
Registers.shadowRegisters["AF"].Set(Registers.byteRegisters["A"], Registers.byteRegisters["F"]);
Registers.byteRegisters["A"] = tmp.High();
Registers.byteRegisters["F"] = tmp.Low();
}
public static ExchangeShadow() {
var regs = ["BC", "DE", "HL"];
for(var reg in regs) {
var tmp = Registers.shadowRegisters[regs[reg]];
Registers.shadowRegisters[regs[reg]].Set(Registers.byteRegisters[regs[reg][0]], Registers.byteRegisters[regs[reg][1]]);
Registers.byteRegisters[regs[reg][0]] = tmp.High();
Registers.byteRegisters[regs[reg][1]] = tmp.Low();
}
}
public static Exchange(a: string, b: string) {
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}
}