JnesBR Another-Yet-NES-Emulator-Debugger

Another project about coding a NES (Famicom) emulator. This project have been developed using Java as language. A debug system is one of goals from this project too. The PPU documentation (still WIP) http://docs.google.com/Doc?id=dgkczz7v_8cwncmfcn .

News

1. You can check it out the earlier screenshots http://code.google.com/p/jnesbr/wiki/screenshots

Curiosity

With the smartest title OO - The other end of the spectrum you can read some opinions at address http://forums.thedailywtf.com/forums/p/11143/193235.aspx and see what they think of my project.

Links

• http://nesdev.parodius.com
• http://code.google.com/p/jnesbr
• http://en.wikipedia.org/wiki/Picture_processing_unit
• http://bobrost.com/nes/lectures/
• http://www.qmtpro.com/~nes/
• http://mdb.classicgaming.gamespy.com/m1/lvldata.htm
• http://emutalk.net/
• http://forums.ngemu.com/
• http://nocash.emubase.de/everynes.htm
• http://nesdev.parodius.com/NESDoc.pdf
• http://www.brgames.org/tutoriais/nesasmbyOdin.pdf (portuguese)
• http://en.wikibooks.org/wiki/NES_Programming
• http://nesdev.parodius.com/nesgfx.txt
• http://nesdev.parodius.com/NES%20emulator%20development%20guide.txt
• http://nesdev.parodius.com/2C02%20technical%20reference.TXT
• http://code.google.com/p/juicynes/
• http://6502.org/
• http://6502.org/tutorials/compare_instructions.html

Logging

06-14-2009 14:34

• Sprite Rendering is almost full implemented, look the http://code.google.com/p/jnesbr/wiki/screenshots

06-06-2009 14:34

• Finally the scrolling was made.
• Lots of fixes and more refactorings than ever.
• New nametable debug window, now it shows the tile view.
• PPU implementation is more mature than ever too.

05-09-2009 16:10

• Finally the nametable mirroring is working.
• The most silly use for the Command (GoF) pattern on it.

05-02-2009 16:10

• Introduction of jogl rendering way.
• Scanline main model is on the way.

04-24-2009 13:58

• Major fixes on instructions.
• Start of redesign of main method of emulator.
• New colors to $2D and $3D palette index.

04-12-2009 15:03

• The OAM (sprite ram) viewer.
• Sprite DMA and normal sprite handling.
• General fixes (absolute indexed store.).
• Better colors for name table/attribute table.

04-09-2009 15:03

• The palette viewer was implemented.
• The multi pattern table was implemented. (reading pattern tables from rom too!)
• The name table was implemented.

04-05-2009 21:41

• All legal opcodes and opcoes were implemented.
• PPU emulations starts with force.
• Palette Windows already shows the first drafts.

04-04-2009 14:34

• Almost all opcodes and some illegal opcoes were implemented.

03-28-2009 16:12

• Addition of special comment at IO mapped memory (ppu, apu, joystick).

03-23-2009 10:36

• Refactoring and reviewing all instructions classes.

03-07-2009 15:34

• Unique way to handle memory.
• Dec and inx instructions, a lot of fix for comparison instruction.
• Run n steps implemented on debug system.

02-24-2009 11:25

• More refactorings.
• All branches relatives implemented.
• Ppu status and more debugger gui for ppu state view.
• Pallete location on memory map.

02-16-2009 22:56

• Gui icons.
• Start ppu debug windows.
• Ppu registers now change the state of ppu.

02-07-2009 15:01

• Pattern Table viewer & Video Memory Viewer.

01-30-2009 23:20

• Simpler and functional debugger.
• Memory viewer now is working.
• More instructions implemented (btw the addressing modes too).
• General fixes, around wraparound, endianess, signed byte ...

01-25-2009 21:30

• Rom reader , shows the header of iNes rom.
• Memory viewer is visible and seems to works (at least with no mapper games).
• Some few (around three) insctructions was implemented.
• The base architecture is already done.
• The initial debug system was started.