static public void OptReset()
{
Z80.Reset();
CRTC.Reset();
PPI.Reset();
UPD.Reset();
VGA.Reset();
}
public Form1()
{
InitializeComponent();
Show();
desasm.Init();
VGA.DecodeurAdresse = 0; // VGA.ROMSUP_OFF;
Z80.Init();
pictureBox1.Image = VGA.Init(pictureBox1.Width, pictureBox1.Height);
PPI.Init();
UPD.Init();
CRTC.Init();
Keyboard.OptReset();
int nbCycles = 0;
while (!finMain)
{
int cycle = Z80.ExecInstr();
bool DoResync = CRTC.CycleCRTC(cycle);
UPD.Cycle(cycle);
nbCycles += cycle;
if (debugMode.Checked)
{
while (!doExec && debugMode.Checked)
{
DoRefresh();
}
doExec = false;
}
else
{
if ((DoResync && nbCycles > 1000) || nbCycles > 100000)
{
DoRefresh();
nbCycles = 0;
}
}
}
}
static public void Load(string fileName)
{
BinaryReader br = new BinaryReader(new FileStream(fileName, FileMode.Open));
string id = System.Text.Encoding.UTF8.GetString(br.ReadBytes(0x10));
byte Version = br.ReadByte();
if (id.Substring(0, 8) == "MV - SNA")
{
Z80.AF.Word = br.ReadUInt16();
Z80.BC.Word = br.ReadUInt16();
Z80.DE.Word = br.ReadUInt16();
Z80.HL.Word = br.ReadUInt16();
Z80.IR.Word = br.ReadUInt16();
Z80.IFF1 = br.ReadByte();
Z80.IFF2 = br.ReadByte();
Z80.IX.Word = br.ReadUInt16();
Z80.IY.Word = br.ReadUInt16();
Z80.SP.Word = br.ReadUInt16();
Z80.PC.Word = br.ReadUInt16();
Z80.InterruptMode = br.ReadByte();
Z80._AF.Word = br.ReadUInt16();
Z80._BC.Word = br.ReadUInt16();
Z80._DE.Word = br.ReadUInt16();
Z80._HL.Word = br.ReadUInt16();
byte InkReg = br.ReadByte();
for (int i = 0; i < 17; i++)
{
byte val = br.ReadByte();
VGA.Write(i);
VGA.Write(0x40 | (val & 0x1F));
VGA.SyncColor();
}
VGA.Write(InkReg);
VGA.Write(0x80 | br.ReadByte());
VGA.Write(0xC0 | (br.ReadByte() & 7));
byte CrtcIndex = br.ReadByte();
for (int i = 0; i < 18; i++)
{
byte val = br.ReadByte();
CRTC.Write(0, i);
CRTC.Write(0x100, val);
}
CRTC.Write(0, CrtcIndex);
VGA.NumRomExt = br.ReadByte();
PPI.RegsPPI = br.ReadBytes(4);
byte PsgIndex = br.ReadByte();
byte[] PsgData = br.ReadBytes(16);
ushort MemSize = br.ReadUInt16();
byte CpcType = br.ReadByte();
byte LastInt = br.ReadByte();
byte[] ScrMode = br.ReadBytes(6);
byte[] DrvAName = br.ReadBytes(13);
byte[] DrvBName = br.ReadBytes(13);
byte[] CartName = br.ReadBytes(13);
UPD.Moteur = br.ReadByte();
UPD.CurrTrack = br.ReadBytes(4);
byte PrinterData = br.ReadByte();
byte EnvStep = br.ReadByte();
byte EnvDir = br.ReadByte();
byte CrtcType = br.ReadByte();
int Unused3 = br.ReadInt32();
byte HCC = br.ReadByte();
byte Unused4 = br.ReadByte();
CRTC.VCC = br.ReadByte();
CRTC.VLC = br.ReadByte();
CRTC.VtAdj = br.ReadByte();
CRTC.TailleHBL = br.ReadByte();
CRTC.TailleVBL = br.ReadByte();
ushort CrtcFlag = br.ReadUInt16();
CRTC.SyncCount = br.ReadByte();
CRTC.CntHSync = br.ReadByte();
Z80.IRQ = br.ReadByte();
byte[] Unused5 = br.ReadBytes(0x4B);
tmpRam = br.ReadBytes(1024 * MemSize);
System.Buffer.BlockCopy(tmpRam, 0, VGA.ram, 0, tmpRam.Length);
}
br.Close();
}
// Exécution de "cycles" crtc (1 cycle = 1µs)
// Retourne un indicateur disant si il faut rafraichir l'écran (une "frame" terminée)
static public bool CycleCRTC(int NbCycles)
{
bool CalcMa = false, DoResync = false;
for (; NbCycles-- > 0;)
{
VCharCount++;
if (HCC++ >= RegsCRTC[0])
{
HCC = 0;
VLC = (byte)((VLC + 1) & 0x1F);
if (VSync != 0 && ++TailleVBL >= ((RegsCRTC[3] & 0xF0) != 0 ? RegsCRTC[3] >> 4 : 16))
{
OldVSync = true;
VSync = 0;
}
if (MR)
{
MR = false;
VLC = 0;
if (!HDT)
{
MaCRTC += RegsCRTC[1];
}
VCC = (byte)((VCC + 1) & 0x7F);
}
if (VtAdj != 0)
{
CalcMa = --VtAdj == 0;
}
if (VT)
{
VT = false;
if ((RegsCRTC[5] & 0x1F) != 0)
{
VtAdj = (byte)(RegsCRTC[5] & 0x1F); // ####
}
else
{
CalcMa = true;
}
//VtAdj = RegsCRTC[ 5 ] & 0x1F;
//CalcMa = ! VtAdj;
}
if (CalcMa)
{
CalcMa = false;
OldVSync = false;
VLC = VCC = 0;
VDT = true;
MaCRTC = RegsCRTC[13] + MaHi;
}
if (VLC == RegsCRTC[9])
{
MR = true;
if (VtAdj == 0 && VCC == RegsCRTC[4])
{
VT = true;
}
}
if (VCC == RegsCRTC[6])
{
VDT = false;
}
if (VCC == RegsCRTC[7] && VSync == 0 && !OldVSync)
{
TailleVBL = 0;
SyncCount = 2;
VSync = 1;
VDelay = 2;
VswCount = 4;
}
HDT = true;
}
if (HCC == RegsCRTC[1])
{
HDT = false;
}
if (HS)
{
if (HDelay == 2)
{
if (--VHCount == 0)
{
LigneCRTC++;
VCharCount = 0;
HDelay++;
}
}
else
{
HDelay++;
}
}
if (TailleHBL != 0 && --TailleHBL == 0)
{
HS = false;
if (VDelay != 0)
{
VDelay--;
}
if (VDelay == 0 && VswCount != 0 && --VswCount == 0)
{
LigneCRTC = 0;
DoResync = true; // ####
}
CntHSync++;
if ((SyncCount != 0 && --SyncCount == 0) || CntHSync == 52)
{
Z80.IRQ = CntHSync & 32; // Si 52 lignes comptée -> Génération d'une interruption
CntHSync = 0;
}
LastMode = VGA.MemoMode; // Prise en compte nouveau mode écran
}
if (HCC == RegsCRTC[2])
{
HDelay = 0;
HS = true;
TailleHBL = (byte)((RegsCRTC[3] & 0x0F) != 0 ? RegsCRTC[3] & 0x0F : 16);
VHCount = (byte)Math.Max(0, Math.Min((TailleHBL - 2), 4));
}
if (x < TAILLE_X_ECR && LigneCRTC >= TAILLE_VBL)
{
VGA.TraceMot(x, y - 1, HDT && VDT ? ((((HCC + MaCRTC) << 1) + (((HCC + MaCRTC) & 0x1000) << 2)) & 0xC7FF) | (VLC << 11) : -1);
x += 8;
}
else
{
VGA.SyncColor();
if (VCharCount == 7)
{
if (y < TAILLE_Y_ECR)
{
x = 0;
y++;
}
else
if (LigneCRTC == TAILLE_VBL)
{
y = 0;
}
}
if (LigneCRTC == TAILLE_Y_CRTC)
{
LigneCRTC = 0;
DoResync = true;
}
}
}
return(DoResync);
}
