Exemple #1
0
    public Screen(Zilog.Z80 cpu, bool renderBorder, bool switchColors, int borderTop = 48, int borderBottom = 56, int borderSide = 64)
    {
        for (int a = 0; a < ScreenAttributes.Length; a++)
        {
            ScreenAttributes[a] = new ScreenAttribute();
        }

        SwitchColors(switchColors);
        RenderBorder = renderBorder;

        if (renderBorder)
        {
            this.bordertop    = borderTop;
            this.borderbottom = borderBottom;
            this.bordersides  = borderSide;
        }
        else
        {
            bordertop    = 0;
            borderbottom = 0;
            bordersides  = 0;
        }

        Height      = 192 + (bordertop + borderbottom);
        Width       = 256 + (bordersides * 2);
        screen      = new uint[Height * Width];
        screenflash = new uint[Height * Width];
        pixels      = new bool[Height * Width];
        this.cpu    = cpu;
    }
Exemple #2
0
    public void LoadSnapshot(byte[] snapshotbytes, Zilog.Z80 cpu)
    {
        List <MemoryBlock> MemoryBlocks = new List <MemoryBlock>();
        int snappshotposition           = 0;

        //Read header bytes
        cpu.A  = snapshotbytes[0];
        cpu.F  = snapshotbytes[1];
        cpu.C  = snapshotbytes[2];
        cpu.B  = snapshotbytes[3];
        cpu.L  = snapshotbytes[4];
        cpu.H  = snapshotbytes[5];
        cpu.PC = (snapshotbytes[7] << 8) | snapshotbytes[6];
        cpu.SP = (snapshotbytes[9] << 8) | snapshotbytes[8];
        cpu.I  = snapshotbytes[10];
        cpu.R  = snapshotbytes[11];

        int bytetwelve = snapshotbytes[12];

        if (bytetwelve == 255)
        {
            bytetwelve = 1;
        }

        //Set border color
        //cpu.Out(254, ((bytetwelve >> 1) & 0x07), 0);

        //Set it 7 on refresh register
        if ((bytetwelve & 0x01) != 0)
        {
            cpu.R7 = 0x80;
        }

        //Is snapshot comressed
        bool isCompressed = ((bytetwelve & 0x20) != 0);

        cpu.E = snapshotbytes[13];
        cpu.D = snapshotbytes[14];

        //Load Prim registers
        cpu.CPrim = snapshotbytes[15];
        cpu.BPrim = snapshotbytes[16];
        cpu.EPrim = snapshotbytes[17];
        cpu.DPrim = snapshotbytes[18];
        cpu.LPrim = snapshotbytes[19];
        cpu.HPrim = snapshotbytes[20];

        cpu.APrim = snapshotbytes[21];
        cpu.FPrim = snapshotbytes[22];

        cpu.IY = snapshotbytes[23] | (snapshotbytes[24] << 8);
        cpu.IX = snapshotbytes[25] | (snapshotbytes[26] << 8);

        cpu.IFF  = (snapshotbytes[27] != 0);
        cpu.IFF2 = (snapshotbytes[28] != 0);

        switch (snapshotbytes[29] & 0x03)
        {
        case 0:
            cpu.IM = 0;
            break;

        case 1:
            cpu.IM = 1;
            break;

        default:
            cpu.IM = 2;
            break;
        }

        /*
         * 29      1       Bit 0-1: Interrupt mode (0, 1 or 2)
         *                      Bit 2  : 1=Issue 2 emulation
         *                      Bit 3  : 1=Double interrupt frequency
         *                      Bit 4-5: 1=High video synchronisation
         *                               3=Low video synchronisation
         *                               0,2=Normal
         *                      Bit 6-7: 0=Cursor/Protek/AGF joystick
         *                               1=Kempston joystick
         *                               2=Sinclair 2 Left joystick (or user
         *                                 defined, for version 3 .z80 files)
         *                               3=Sinclair 2 Right joystick
         *  No need to read an support all of these.
         */

        snappshotposition = 30;
        if (cpu.PC == 0)
        {/*
          * Extended format
          * Most bytes in the extended section will be discarded since there are no support for them
          */
            int numberofheaderbytes = snapshotbytes[snappshotposition++] | (snapshotbytes[snappshotposition++] << 8);
            cpu.PC = (snapshotbytes[32]) | (snapshotbytes[33] << 8);

            //The rest of the header information is not relevant for this emulator
            snappshotposition += numberofheaderbytes;

            while (snappshotposition < snapshotbytes.Length)
            { //Load memory blocks
                MemoryBlock mb                = new MemoryBlock();
                int         datalength        = (snapshotbytes[snappshotposition++]) | (snapshotbytes[snappshotposition++] << 8);
                int         MemoryBlockNumber = snapshotbytes[snappshotposition++];
                if (datalength == 0xffff)
                {   //Not compressed
                    datalength   = 16384;
                    isCompressed = false;
                }
                else
                {
                    isCompressed = true;
                }
                mb = GetMemoryBlock(snapshotbytes, snappshotposition, datalength, isCompressed, MemoryBlockNumber);
                snappshotposition += datalength;
                MemoryBlocks.Add(mb);
            }
        }
        else //After the first 30 bytes a memory dump och the 48k Spectrum follows.
        {
            MemoryBlock mb = GetMemoryBlock(snapshotbytes, 30, snapshotbytes.Length - 30, isCompressed, -1);
            //Memoryblock = -1 since this is no "real" block
            MemoryBlocks.Add(mb);
        }

        //Debug.WriteLineIf(MemoryBlocks.Count <= 3, "48K Z80");
        //Debug.WriteLineIf(MemoryBlocks.Count > 3, "128K Z80");
        //Debug.WriteLineIf((snapshotbytes[29] >> 0x06) == 0, "Cursor");
        //Debug.WriteLineIf((snapshotbytes[29] >> 0x06) == 1, "Kempston");
        //Debug.WriteLineIf((snapshotbytes[29] >> 0x06) == 2, "Sinclair 2 Left joystick");
        //Debug.WriteLineIf((snapshotbytes[29] >> 0x06) == 3, "Sinclair 2 Right joystick");

        //Load Memoryblocks into memory
        foreach (MemoryBlock mb in MemoryBlocks)
        {
            switch (mb.MemoryBlockNumber)
            {
            case -1:        //All Ram
                MemoryHandler.LoadBytesintoMemory(mb.MemoryData.ToArray(), 16384, cpu);
                break;

            case 0:         //Rom
                MemoryHandler.LoadBytesintoMemory(mb.MemoryData.ToArray(), 0, cpu);
                break;

            case 1:         //Interface 1
            case 2:         //Not used for 48
            case 3:         //Not used for 48
            case 6:         //Not used for 48
            case 7:         //Not used for 48
            case 9:         //Not used for 48
            case 10:        //Not used for 48
            case 11:        //Multiface rom
                //Currently no support, using a file with these blocks might result in errors
                break;

            case 4:         //Normal 8000-bfff
                MemoryHandler.LoadBytesintoMemory(mb.MemoryData.ToArray(), 0x8000, cpu);
                break;

            case 5:         //Normal c000-ffff
                MemoryHandler.LoadBytesintoMemory(mb.MemoryData.ToArray(), 0xc000, cpu);
                break;
                break;

            //case 3:
            case 8:         //Normal 4000-7ffff
                //Loaded from 3
                MemoryHandler.LoadBytesintoMemory(mb.MemoryData.ToArray(), 0x4000, cpu);
                break;
            }
        }
    }
 public static void LoadBytesintoMemory(Byte[] bytes, int MemoryStartIndex, Zilog.Z80 cpu)
 {
     //foreach (byte b in bytes)
     //    cpu.Memory[MemoryStartIndex++] = b;
     LoadBytesintoMemory(bytes, 0, MemoryStartIndex, cpu);
 }
Exemple #4
0
 public byte[] SaveSnapshot(Zilog.Z80 cpu)
 {
     throw new NotImplementedException();
 }
 public static void LoadBytesintoMemory(Byte[] bytes, int ByteArrayStartIndex, int MemoryStartIndex, Zilog.Z80 cpu)
 {
     for (int a = ByteArrayStartIndex; a < bytes.Length && MemoryStartIndex < bytes.Length; a++)
     {
         cpu.WriteByteToMemory(MemoryStartIndex++, bytes[a]);
     }
 }