private void HandleExtbioCall()
{
if (cpu.Registers.DE != 0x2222 || cpu.Registers.A == 0xFF)
{
return;
}
var suppliedSpecIdentifier = Encoding.ASCII.GetString(GetMemoryContents(ARG, SpecIdentifier.Length + 1));
if (!suppliedSpecIdentifier.Equals(SpecIdentifier + "\0", StringComparison.InvariantCultureIgnoreCase))
{
return;
}
if (cpu.Registers.A == 0)
{
cpu.Registers.B++;
return;
}
if (cpu.Registers.A == 1)
{
cpu.Registers.A = slotNumber;
cpu.Registers.B = 0xFF;
cpu.Registers.HL = EntryPointAddress;
cpu.ExecuteRet();
return;
}
cpu.Registers.A--;
}
private void BeforeZ80InstructionFetch(ushort instructionAddress)
{
if (memory.GetCurrentSlot(1) != slotNumber)
{
return;
}
if (kernelRoutines.ContainsKey(z80.Registers.PC))
{
var routine = kernelRoutines[z80.Registers.PC];
routine();
z80.ExecuteRet();
}
}
private void CpuOnBeforeInstructionFetch(object sender, BeforeInstructionFetchEventArgs e)
{
if (!hookedMethods.ContainsKey(regs.PC))
{
return;
}
if (segmentNumber == null &&
(mappedRam = slotsSystem.GetSlotContents(slotsSystem.GetCurrentSlot(1)) as IMappedRam) != null &&
ExtractString(0x4000, 14) == "FileSysDriver")
{
segmentNumber = mappedRam.GetBlockInBank(1);
}
if (segmentNumber != null &&
mappedRam?.GetBlockInBank(1) == segmentNumber.Value &&
slotsSystem.GetSlotContents(slotsSystem.GetCurrentSlot(1)) == mappedRam)
{
hookedMethods[regs.PC]();
cpu.ExecuteRet();
}
}
