public Machine(ISound sound, IM6809 cpu, IInput input, IMemory memory)
{
_mem = memory;
Sound = sound;
Input = input;
_cpu = cpu;
cpu.Reset();
Screen = new Screen(_mem);
}
private void ReadBit(IM6809 machine)
{
if (!IsFileOpened)
{
return;
}
// need to read 1 byte ?
if (_k7Bit == 0x00)
{
try
{
_k7Byte = _k7FileStream.ReadByte();
}
catch (Exception)
{
}
_k7Bit = 0x80;
}
var octet = _mem.Read(0x2045) << 1;
if ((_k7Byte & _k7Bit) == 0)
{
machine.RegA = 0;
}
else
{
octet |= 0x01;
machine.RegA = 0xFF;
}
// positionne l'octet dans la page 0 du moniteur
_mem.Write(0x2045, octet & 0xFF);
_k7Bit = _k7Bit >> 1;
}