TI83 - put Link Port class into its own file with a rename and some refactor
This commit is contained in:
adelikat
parent
c1c9a482f9
commit
c61dd6b295
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@ -89,6 +89,7 @@
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<Compile Include="Calculator\TI83.ISettable.cs" />
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<Compile Include="Calculator\TI83.cs" />
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<Compile Include="Calculator\TI83.IDebuggable.cs" />
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<Compile Include="Calculator\TI83LinkPort.cs" />
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<Compile Include="Computers\Commodore64\C64.Core.cs" />
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<Compile Include="Computers\Commodore64\C64.cs" />
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<Compile Include="Computers\Commodore64\C64.Motherboard.cs" />
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@ -34,9 +34,9 @@ namespace BizHawk.Emulation.Cores.Calculators
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private int disp_mode;
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private int disp_move;
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private uint disp_x, disp_y;
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private int m_LinkOutput, m_LinkInput;
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internal int m_LinkOutput, m_LinkInput;
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private int m_LinkState
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internal int m_LinkState
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{
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get
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{
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@ -44,7 +44,7 @@ namespace BizHawk.Emulation.Cores.Calculators
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}
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}
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private bool LinkActive;
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internal bool LinkActive;
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private bool m_CursorMoved;
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private int lagCount = 0;
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@ -66,7 +66,7 @@ namespace BizHawk.Emulation.Cores.Calculators
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cpu.NMICallback = NMICallback;
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this.rom = rom;
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LinkPort = new Link(this);
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LinkPort = new TI83LinkPort(this);
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//different calculators (different revisions?) have different initPC. we track this in the game database by rom hash
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//if( *(unsigned long *)(m_pRom + 0x6ce) == 0x04D3163E ) m_Regs.PC.W = 0x6ce; //KNOWN
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@ -591,374 +591,6 @@ namespace BizHawk.Emulation.Cores.Calculators
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public void Dispose() { }
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public Link LinkPort;
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public class Link
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{
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// Emulates TI linking software.
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// See http://www.ticalc.org/archives/files/fileinfo/294/29418.html for documentation
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// Note: Each hardware read/write to the link port calls tthe update method.
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readonly TI83 Parent;
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private FileStream CurrentFile;
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//private int FileBytesLeft;
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private byte[] VariableData;
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private Action NextStep;
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private Queue<byte> CurrentData = new Queue<byte>();
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private ushort BytesToSend;
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private byte BitsLeft;
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private byte CurrentByte;
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private byte StepsLeft;
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private Status CurrentStatus = Status.Inactive;
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private enum Status
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{
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Inactive,
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PrepareReceive,
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PrepareSend,
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Receive,
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Send
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}
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public Link(TI83 Parent)
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{
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this.Parent = Parent;
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}
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public void Update()
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{
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if (CurrentStatus == Status.PrepareReceive)
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{
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//Get the first byte, and start sending it.
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CurrentByte = CurrentData.Dequeue();
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CurrentStatus = Status.Receive;
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BitsLeft = 8;
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StepsLeft = 5;
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}
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if (CurrentStatus == Status.PrepareSend && Parent.m_LinkState != 3)
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{
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CurrentStatus = Status.Send;
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BitsLeft = 8;
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StepsLeft = 5;
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CurrentByte = 0;
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}
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if (CurrentStatus == Status.Receive)
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{
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switch (StepsLeft)
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{
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case 5:
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//Receive step 1: Lower the other device's line.
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Parent.m_LinkInput = ((CurrentByte & 1) == 1) ? 2 : 1;
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CurrentByte >>= 1;
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StepsLeft--;
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break;
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case 4:
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//Receive step 2: Wait for the calc to lower the other line.
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if ((Parent.m_LinkState & 3) == 0)
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StepsLeft--;
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break;
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case 3:
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//Receive step 3: Raise the other device's line back up.
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Parent.m_LinkInput = 0;
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StepsLeft--;
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break;
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case 2:
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//Receive step 4: Wait for the calc to raise its line back up.
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if ((Parent.m_LinkState & 3) == 3)
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StepsLeft--;
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break;
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case 1:
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//Receive step 5: Finish.
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BitsLeft--;
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if (BitsLeft == 0)
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{
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if (CurrentData.Count > 0)
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CurrentStatus = Status.PrepareReceive;
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else
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{
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CurrentStatus = Status.Inactive;
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if (NextStep != null)
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NextStep();
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}
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}
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else
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//next bit in the current byte.
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StepsLeft = 5;
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break;
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}
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}
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else if (CurrentStatus == Status.Send)
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{
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switch (StepsLeft)
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{
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case 5:
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//Send step 1: Calc lowers a line.
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if (Parent.m_LinkState != 3)
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{
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int Bit = Parent.m_LinkState & 1;
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int Shift = 8 - BitsLeft;
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CurrentByte |= (byte)(Bit << Shift);
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StepsLeft--;
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}
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break;
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case 4:
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//send step 2: Lower our line.
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Parent.m_LinkInput = Parent.m_LinkOutput ^ 3;
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StepsLeft--;
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break;
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case 3:
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//Send step 3: wait for the calc to raise its line.
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if ((Parent.m_LinkOutput & 3) == 0)
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StepsLeft--;
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break;
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case 2:
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//Send step 4: raise the other devices lines.
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Parent.m_LinkInput = 0;
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StepsLeft--;
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break;
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case 1:
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//Send step 5: Finish
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BitsLeft--;
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if (BitsLeft == 0)
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{
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BytesToSend--;
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CurrentData.Enqueue(CurrentByte);
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if (BytesToSend > 0)
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CurrentStatus = Status.PrepareSend;
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else
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{
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CurrentStatus = Status.Inactive;
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if (NextStep != null)
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NextStep();
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}
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}
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else
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{
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//next bit in the current byte.
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StepsLeft = 5;
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}
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break;
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}
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}
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}
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public void SendFileToCalc(FileStream FS, bool Verify)
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{
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if (Verify)
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VerifyFile(FS);
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FS.Seek(55, SeekOrigin.Begin);
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CurrentFile = FS;
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SendNextFile();
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}
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private void VerifyFile(FileStream FS)
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{
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//Verify the file format.
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byte[] Expected = new byte[] { 0x2a, 0x2a, 0x54, 0x49, 0x38, 0x33, 0x2a, 0x2a, 0x1a, 0x0a, 0x00 };
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byte[] Actual = new byte[11];
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FS.Seek(0, SeekOrigin.Begin);
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FS.Read(Actual, 0, 11);
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//Check the header.
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for (int n = 0; n < 11; n++)
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if (Expected[n] != Actual[n])
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{
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FS.Close();
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throw new IOException("Invalid Header.");
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}
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//Seek to the end of the comment.
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FS.Seek(53, SeekOrigin.Begin);
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int Size = FS.ReadByte() + FS.ReadByte() * 256;
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if (FS.Length != Size + 57)
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{
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FS.Close();
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throw new IOException("Invalid file length.");
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}
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//Verify the checksum.
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ushort Checksum = 0;
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for (int n = 0; n < Size; n++)
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Checksum += (ushort)FS.ReadByte();
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ushort ActualChecksum = (ushort)(FS.ReadByte() + FS.ReadByte() * 256);
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if (Checksum != ActualChecksum)
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{
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FS.Close();
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throw new IOException("Invalid Checksum.");
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}
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}
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private void SendNextFile()
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{
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byte[] Header = new byte[13];
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if (!CurrentFile.CanRead || CurrentFile.Read(Header, 0, 13) != 13)
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{
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//End of file.
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CurrentFile.Close();
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return;
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}
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int Size = Header[2] + Header[3] * 256;
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VariableData = new byte[Size + 2];
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CurrentFile.Read(VariableData, 0, Size + 2);
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//Request to send the file.
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CurrentData.Clear();
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CurrentData.Enqueue(0x03);
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CurrentData.Enqueue(0xC9);
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foreach (byte B in Header)
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CurrentData.Enqueue(B);
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//Calculate the checksum for the command.
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ushort Checksum = 0;
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for (int n = 2; n < Header.Length; n++)
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Checksum += Header[n];
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CurrentData.Enqueue((byte)(Checksum % 256));
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CurrentData.Enqueue((byte)(Checksum / 256));
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//Finalize the command.
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CurrentStatus = Status.PrepareReceive;
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NextStep = ReceiveReqAck;
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Parent.LinkActive = true;
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}
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private void ReceiveReqAck()
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{
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Parent.LinkActive = false;
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CurrentData.Clear();
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// Prepare to receive the Aknowledgement response from the calculator.
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BytesToSend = 8;
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CurrentStatus = Status.PrepareSend;
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NextStep = SendVariableData;
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}
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private void SendVariableData()
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{
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// Check to see if out of memory first.
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CurrentData.Dequeue();
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CurrentData.Dequeue();
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CurrentData.Dequeue();
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CurrentData.Dequeue();
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CurrentData.Dequeue();
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if (CurrentData.Dequeue() == 0x36)
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OutOfMemory();
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else
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{
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CurrentData.Clear();
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CurrentData.Enqueue(0x03);
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CurrentData.Enqueue(0x56);
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CurrentData.Enqueue(0x00);
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CurrentData.Enqueue(0x00);
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CurrentData.Enqueue(0x03);
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CurrentData.Enqueue(0x15);
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//Add variable data.
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foreach (byte B in VariableData)
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CurrentData.Enqueue(B);
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//Calculate the checksum.
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ushort Checksum = 0;
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for (int n = 2; n < VariableData.Length; n++)
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Checksum += VariableData[n];
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CurrentData.Enqueue((byte)(Checksum % 256));
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CurrentData.Enqueue((byte)(Checksum / 256));
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CurrentStatus = Status.PrepareReceive;
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NextStep = ReceiveDataAck;
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Parent.LinkActive = true;
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}
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}
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private void ReceiveDataAck()
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{
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Parent.LinkActive = false;
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CurrentData.Clear();
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// Prepare to receive the Aknowledgement response from the calculator.
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BytesToSend = 4;
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CurrentStatus = Status.PrepareSend;
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NextStep = EndTransmission;
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}
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private void EndTransmission()
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{
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CurrentData.Clear();
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// Send the end transmission command.
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CurrentData.Enqueue(0x03);
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CurrentData.Enqueue(0x92);
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CurrentData.Enqueue(0x00);
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CurrentData.Enqueue(0x00);
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CurrentStatus = Status.PrepareReceive;
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NextStep = FinalizeFile;
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Parent.LinkActive = true;
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}
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private void OutOfMemory()
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{
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CurrentFile.Close();
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Parent.LinkActive = false;
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CurrentData.Clear();
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// Prepare to receive the Aknowledgement response from the calculator.
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BytesToSend = 3;
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CurrentStatus = Status.PrepareSend;
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NextStep = EndOutOfMemory;
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}
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private void EndOutOfMemory()
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{
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CurrentData.Clear();
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// Send the end transmission command.
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CurrentData.Enqueue(0x03);
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CurrentData.Enqueue(0x56);
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CurrentData.Enqueue(0x01);
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CurrentData.Enqueue(0x00);
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CurrentStatus = Status.PrepareReceive;
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NextStep = FinalizeFile;
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Parent.LinkActive = true;
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}
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private void FinalizeFile()
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{
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// Resets the link software, and checks to see if there is an additional file to send.
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CurrentData.Clear();
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Parent.LinkActive = false;
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NextStep = null;
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SendNextFile();
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}
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}
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public TI83LinkPort LinkPort { get; set; }
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}
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}
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@ -0,0 +1,376 @@
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using System;
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using System.Collections.Generic;
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using System.IO;
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namespace BizHawk.Emulation.Cores.Calculators
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{
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public class TI83LinkPort
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{
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// Emulates TI linking software.
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// See http://www.ticalc.org/archives/files/fileinfo/294/29418.html for documentation
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// Note: Each hardware read/write to the link port calls tthe update method.
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readonly TI83 Parent;
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private FileStream CurrentFile;
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//private int FileBytesLeft;
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private byte[] VariableData;
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private Action NextStep;
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private Queue<byte> CurrentData = new Queue<byte>();
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private ushort BytesToSend;
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private byte BitsLeft;
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private byte CurrentByte;
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private byte StepsLeft;
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private Status CurrentStatus = Status.Inactive;
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private enum Status
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{
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Inactive,
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PrepareReceive,
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PrepareSend,
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Receive,
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Send
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}
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public TI83LinkPort(TI83 Parent)
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{
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this.Parent = Parent;
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}
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public void Update()
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{
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if (CurrentStatus == Status.PrepareReceive)
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{
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//Get the first byte, and start sending it.
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CurrentByte = CurrentData.Dequeue();
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CurrentStatus = Status.Receive;
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BitsLeft = 8;
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StepsLeft = 5;
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}
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if (CurrentStatus == Status.PrepareSend && Parent.m_LinkState != 3)
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{
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CurrentStatus = Status.Send;
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BitsLeft = 8;
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StepsLeft = 5;
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CurrentByte = 0;
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}
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if (CurrentStatus == Status.Receive)
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{
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switch (StepsLeft)
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{
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case 5:
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//Receive step 1: Lower the other device's line.
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Parent.m_LinkInput = ((CurrentByte & 1) == 1) ? 2 : 1;
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CurrentByte >>= 1;
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StepsLeft--;
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break;
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case 4:
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//Receive step 2: Wait for the calc to lower the other line.
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if ((Parent.m_LinkState & 3) == 0)
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StepsLeft--;
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break;
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case 3:
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//Receive step 3: Raise the other device's line back up.
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Parent.m_LinkInput = 0;
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StepsLeft--;
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break;
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case 2:
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//Receive step 4: Wait for the calc to raise its line back up.
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if ((Parent.m_LinkState & 3) == 3)
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StepsLeft--;
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break;
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case 1:
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//Receive step 5: Finish.
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BitsLeft--;
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if (BitsLeft == 0)
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{
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if (CurrentData.Count > 0)
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CurrentStatus = Status.PrepareReceive;
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else
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{
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CurrentStatus = Status.Inactive;
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if (NextStep != null)
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NextStep();
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}
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}
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else
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//next bit in the current byte.
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StepsLeft = 5;
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break;
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}
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}
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else if (CurrentStatus == Status.Send)
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{
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switch (StepsLeft)
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{
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case 5:
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//Send step 1: Calc lowers a line.
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if (Parent.m_LinkState != 3)
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{
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int Bit = Parent.m_LinkState & 1;
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int Shift = 8 - BitsLeft;
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CurrentByte |= (byte)(Bit << Shift);
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StepsLeft--;
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}
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break;
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case 4:
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//send step 2: Lower our line.
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Parent.m_LinkInput = Parent.m_LinkOutput ^ 3;
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StepsLeft--;
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break;
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case 3:
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//Send step 3: wait for the calc to raise its line.
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if ((Parent.m_LinkOutput & 3) == 0)
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StepsLeft--;
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break;
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case 2:
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//Send step 4: raise the other devices lines.
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Parent.m_LinkInput = 0;
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StepsLeft--;
|
||||
break;
|
||||
|
||||
case 1:
|
||||
//Send step 5: Finish
|
||||
BitsLeft--;
|
||||
|
||||
if (BitsLeft == 0)
|
||||
{
|
||||
BytesToSend--;
|
||||
CurrentData.Enqueue(CurrentByte);
|
||||
|
||||
if (BytesToSend > 0)
|
||||
CurrentStatus = Status.PrepareSend;
|
||||
else
|
||||
{
|
||||
CurrentStatus = Status.Inactive;
|
||||
if (NextStep != null)
|
||||
NextStep();
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
//next bit in the current byte.
|
||||
StepsLeft = 5;
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public void SendFileToCalc(FileStream FS, bool Verify)
|
||||
{
|
||||
if (Verify)
|
||||
VerifyFile(FS);
|
||||
|
||||
FS.Seek(55, SeekOrigin.Begin);
|
||||
CurrentFile = FS;
|
||||
SendNextFile();
|
||||
}
|
||||
|
||||
private void VerifyFile(FileStream FS)
|
||||
{
|
||||
//Verify the file format.
|
||||
byte[] Expected = new byte[] { 0x2a, 0x2a, 0x54, 0x49, 0x38, 0x33, 0x2a, 0x2a, 0x1a, 0x0a, 0x00 };
|
||||
byte[] Actual = new byte[11];
|
||||
|
||||
FS.Seek(0, SeekOrigin.Begin);
|
||||
FS.Read(Actual, 0, 11);
|
||||
|
||||
//Check the header.
|
||||
for (int n = 0; n < 11; n++)
|
||||
if (Expected[n] != Actual[n])
|
||||
{
|
||||
FS.Close();
|
||||
throw new IOException("Invalid Header.");
|
||||
}
|
||||
|
||||
//Seek to the end of the comment.
|
||||
FS.Seek(53, SeekOrigin.Begin);
|
||||
|
||||
int Size = FS.ReadByte() + FS.ReadByte() * 256;
|
||||
|
||||
if (FS.Length != Size + 57)
|
||||
{
|
||||
FS.Close();
|
||||
throw new IOException("Invalid file length.");
|
||||
}
|
||||
|
||||
//Verify the checksum.
|
||||
ushort Checksum = 0;
|
||||
for (int n = 0; n < Size; n++)
|
||||
Checksum += (ushort)FS.ReadByte();
|
||||
|
||||
ushort ActualChecksum = (ushort)(FS.ReadByte() + FS.ReadByte() * 256);
|
||||
|
||||
if (Checksum != ActualChecksum)
|
||||
{
|
||||
FS.Close();
|
||||
throw new IOException("Invalid Checksum.");
|
||||
}
|
||||
}
|
||||
|
||||
private void SendNextFile()
|
||||
{
|
||||
byte[] Header = new byte[13];
|
||||
if (!CurrentFile.CanRead || CurrentFile.Read(Header, 0, 13) != 13)
|
||||
{
|
||||
//End of file.
|
||||
CurrentFile.Close();
|
||||
return;
|
||||
}
|
||||
|
||||
int Size = Header[2] + Header[3] * 256;
|
||||
VariableData = new byte[Size + 2];
|
||||
CurrentFile.Read(VariableData, 0, Size + 2);
|
||||
|
||||
//Request to send the file.
|
||||
CurrentData.Clear();
|
||||
|
||||
CurrentData.Enqueue(0x03);
|
||||
CurrentData.Enqueue(0xC9);
|
||||
foreach (byte B in Header)
|
||||
CurrentData.Enqueue(B);
|
||||
|
||||
//Calculate the checksum for the command.
|
||||
ushort Checksum = 0;
|
||||
for (int n = 2; n < Header.Length; n++)
|
||||
Checksum += Header[n];
|
||||
|
||||
CurrentData.Enqueue((byte)(Checksum % 256));
|
||||
CurrentData.Enqueue((byte)(Checksum / 256));
|
||||
|
||||
//Finalize the command.
|
||||
CurrentStatus = Status.PrepareReceive;
|
||||
NextStep = ReceiveReqAck;
|
||||
Parent.LinkActive = true;
|
||||
}
|
||||
|
||||
private void ReceiveReqAck()
|
||||
{
|
||||
Parent.LinkActive = false;
|
||||
CurrentData.Clear();
|
||||
|
||||
// Prepare to receive the Aknowledgement response from the calculator.
|
||||
BytesToSend = 8;
|
||||
CurrentStatus = Status.PrepareSend;
|
||||
NextStep = SendVariableData;
|
||||
}
|
||||
|
||||
private void SendVariableData()
|
||||
{
|
||||
// Check to see if out of memory first.
|
||||
CurrentData.Dequeue();
|
||||
CurrentData.Dequeue();
|
||||
CurrentData.Dequeue();
|
||||
CurrentData.Dequeue();
|
||||
CurrentData.Dequeue();
|
||||
|
||||
if (CurrentData.Dequeue() == 0x36)
|
||||
{
|
||||
OutOfMemory();
|
||||
}
|
||||
else
|
||||
{
|
||||
CurrentData.Clear();
|
||||
|
||||
CurrentData.Enqueue(0x03);
|
||||
CurrentData.Enqueue(0x56);
|
||||
CurrentData.Enqueue(0x00);
|
||||
CurrentData.Enqueue(0x00);
|
||||
|
||||
CurrentData.Enqueue(0x03);
|
||||
CurrentData.Enqueue(0x15);
|
||||
|
||||
//Add variable data.
|
||||
foreach (byte B in VariableData)
|
||||
CurrentData.Enqueue(B);
|
||||
|
||||
//Calculate the checksum.
|
||||
ushort Checksum = 0;
|
||||
for (int n = 2; n < VariableData.Length; n++)
|
||||
Checksum += VariableData[n];
|
||||
|
||||
CurrentData.Enqueue((byte)(Checksum % 256));
|
||||
CurrentData.Enqueue((byte)(Checksum / 256));
|
||||
|
||||
CurrentStatus = Status.PrepareReceive;
|
||||
NextStep = ReceiveDataAck;
|
||||
Parent.LinkActive = true;
|
||||
}
|
||||
}
|
||||
|
||||
private void ReceiveDataAck()
|
||||
{
|
||||
Parent.LinkActive = false;
|
||||
CurrentData.Clear();
|
||||
|
||||
// Prepare to receive the Aknowledgement response from the calculator.
|
||||
BytesToSend = 4;
|
||||
CurrentStatus = Status.PrepareSend;
|
||||
NextStep = EndTransmission;
|
||||
}
|
||||
|
||||
private void EndTransmission()
|
||||
{
|
||||
CurrentData.Clear();
|
||||
|
||||
// Send the end transmission command.
|
||||
CurrentData.Enqueue(0x03);
|
||||
CurrentData.Enqueue(0x92);
|
||||
CurrentData.Enqueue(0x00);
|
||||
CurrentData.Enqueue(0x00);
|
||||
|
||||
CurrentStatus = Status.PrepareReceive;
|
||||
NextStep = FinalizeFile;
|
||||
Parent.LinkActive = true;
|
||||
}
|
||||
|
||||
private void OutOfMemory()
|
||||
{
|
||||
CurrentFile.Close();
|
||||
Parent.LinkActive = false;
|
||||
CurrentData.Clear();
|
||||
|
||||
// Prepare to receive the Aknowledgement response from the calculator.
|
||||
BytesToSend = 3;
|
||||
CurrentStatus = Status.PrepareSend;
|
||||
NextStep = EndOutOfMemory;
|
||||
}
|
||||
|
||||
private void EndOutOfMemory()
|
||||
{
|
||||
CurrentData.Clear();
|
||||
|
||||
// Send the end transmission command.
|
||||
CurrentData.Enqueue(0x03);
|
||||
CurrentData.Enqueue(0x56);
|
||||
CurrentData.Enqueue(0x01);
|
||||
CurrentData.Enqueue(0x00);
|
||||
|
||||
CurrentStatus = Status.PrepareReceive;
|
||||
NextStep = FinalizeFile;
|
||||
Parent.LinkActive = true;
|
||||
}
|
||||
|
||||
private void FinalizeFile()
|
||||
{
|
||||
// Resets the link software, and checks to see if there is an additional file to send.
|
||||
CurrentData.Clear();
|
||||
Parent.LinkActive = false;
|
||||
NextStep = null;
|
||||
SendNextFile();
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue