CPU

[saku-koodari]

Start CPU This is now CPU general issue. This issue has at the moment highest priority.

Sub-tasks:

• CPU Speed 100%  #35: CPU Speed 100%
• CPU emulate cycle
  • Fetch Opcode #36 Fetch Opcode
  • Decode Opcode #37 Decode Opcode
  • Execute Opcode #38 Execute Opcode

[saku-koodari]

Due to loop, Cpu must running asynchronously along the form.

https://msdn.microsoft.com/en-us/library/mt679047.aspx
So you have to make an own thread for the loop

First I just do one, that go full speed. I do 100% speed later.

For the speed of loop, some specs:

• Clock Speed: 4.194304 MHz
• Horiz Sync: 9198 KHz
• Vert Sync: 59.73 Hz

[saku-koodari]

based on this: http://www.multigesture.net/articles/how-to-write-an-emulator-chip-8-interpreter/
the loop for emulator (Emulator.cs) could look like:

 // Emulation loop
  for(;;)
  {
    // Emulate one cycle
    // If the draw flag is set, update the screen
    // Store key press state (Press and Release)
  }

[saku-koodari]

(using same source than previous comment)
the emulate cycle:

• Fetch Opcode
• Decode Opcode
• Execute Opcode
• Update timers
  Those can just be method on LR35902.cs It doesn't need loop because there is a loop in Emulator.cs

[saku-koodari]

Bits are stored in little endian (reversed order)

[saku-koodari]

Remember that this issue is higly related with #2