Wii7800

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Wii7800
Wii7800.png
General
Author(s)Raz0red
TypeConsole emulator
Version0.3
Links
Download
Website
Discussion
Source
Downloadable via the Homebrew Browser
Peripherals
WiiMote2.svg Nunchuck alternative.svg ClassicController.svg GameCube Controller Loads files from the Front SD slot

Wii7800 is a port of the ProSystem emulator developed by Greg Stanton. Additional changes developed by Ludovic Jacomme aka Zx-81 (PSP port), Leonis, and gdement.

Contents

Known Issues

  • Audio still has some minor issues (appears to be related to the resampling algorithm used by ProSystem).
  • High Score cartridge is only compatible with NTSC games.

Installation

To install Wii7800, simply extract the zip file directly to your SD card (retain the hierarchical structure exactly).

Cartridge images should be placed in the roms directory (/wii7800/roms). (Zip files are supported)

Wii7800 does support loading of the Atari 7800 BIOS, although it isn't necessary. If you wish to use the BIOS, simply place the NTSC and PAL BIOS files in the (/wii7800) directory. The NTSC file must be named, "7800.rom", while the PAL file must be named, "7800pal.rom".

Lightgun Accuracy, etc.

The crosshair for the Wii7800 emulator is not perfect. For example you may be pointing at something and your shot may register to the right or left. This is due to the way the 7800 handles hit detection for lightgun games. It only checks for a hit every 7 CPU cycles. There are 330 cycles for the visible portion of each frame. Thus, there are only ~47 hit points for each scanline. So, the crosshair at best gets you in approximately the right area, and if you miss you need to adjust based on where the shot shows up on the screen (exactly how you do it when there is no crosshair).

Cartridge/ROM Compatibility

To find out if a particular cartridge/ROM is compatible with Wii7800, please refer to the following page:

Wii7800 Cartridge Compatibility List

This page contains a list of compatible ROMs by "hash code". Turn on debug information (via the advanced menu) to display the "hash code" for ROMs when they are loaded.

Status

  • Released 0.3. --Raz0red 20:09, 29 March 2010 (UTC)

Controls

Wii7800 menu

Wiimote.svg Wiimote.svg + Nunchuck alternative.svg ClassicController.svg GameCube Controller Action
Wiimote D-Pad Up / Wiimote D-Pad Down Wiimote D-Pad Up / Wiimote D-Pad Down or Nunchuck Control Stick Classic D-Pad Up / Classic D-Pad Down or Classic Left Control Stick Gamecube D-Pad Up / Gamecube D-Pad Down or GameCube Control Stick Scroll through the Menu
Wiimote D-Pad Left / Wiimote D-Pad Right Wiimote D-Pad Left / Wiimote D-Pad Right or Nunchuck Control Stick Classic D-Pad Left / Classic D-Pad Right or Classic Left Control Stick Gamecube D-Pad Left / Gamecube D-Pad Right or GameCube Control Stick Page through the Menu
Wiimote A Button Wiimote A Button or Nunchuck C Button Classic a Button Gamecube A Button Select menu item
Wiimote B Button Wiimote B Button or Nunchuck Z Button Classic b Button Gamecube B Button Previous menu
Wiimote HOME Button Wiimote HOME Button Classic HOME Button GameCube Z Button Exit to Homebrew channel

In-game (Joystick)

WiimoteHorizontal.svg Wiimote.svg + Nunchuck alternative.svg ClassicController.svg GameCube Controller Action
Wiimote D-Pad Nunchuck Control Stick Classic D-Pad or Classic Left Control Stick GameCube D-Pad or GameCube Control Stick Move
None None Classic Right Control Stick Gamecube C Control Stick Dual analog (if enabled)
Wiimote 2 Button Wiimote 2 Button or Nunchuck C Button Classic a Button Gamecube A Button Fire 1
Wiimote 1 Button Wiimote 1 Button or Nunchuck Z Button Classic b Button Gamecube B Button Fire 2
Wiimote + Button Wiimote + Button Classic + Button GameCube START Button Reset
Wiimote - Button Wiimote - Button Classic - Button GameCube L Trigger Select
None None Classic ZL Button or Classic ZR Button GameCube R Trigger Pause
Wiimote A Button Wiimote A Button Classic L Trigger Gamecube Y Button Left Difficulty (if enabled)
Wiimote B Button Wiimote B Button Classic R Trigger Gamecube X Button Right Difficulty (if enabled)
Wiimote HOME Button Wiimote HOME Button Classic HOME Button GameCube Z Button Display Wii7800 menu (see above)

In-game (Lightgun)

Wiimote.svg Action
Wii Remote Aim Move
Wiimote A Button or Wiimote B Button Fire
Wiimote + Button Reset
Wiimote - Button Select
Wiimote HOME Button Display Wii7800 menu (see above)

Screenshots

Special thanks

  • munky6 ~ Lead tester
  • Curt Vendel ~ Granting permission to use the High Score ROM
  • GroovyBee ~ Technical assistance
  • mimo ~ Testing
  • wilsoff ~ Icon
  • Tantric/eke-eke ~ Audio code example
  • Tantric ~ Huge improvements to the SDL
  • Team Twiizers ~ For enabling homebrew

Changelog

0.3 - March 29, 2010

  • GX based scaler (smoother scrolling in Plutos, Xevious, Motor Psycho)
  • Ability to adjust screen size to any size/dimensions via the "Screen Size" option under "Display". If this is entered after loading a cartridge, the last frame will be displayed to assist in sizing.
  • Fixed graphical glitches in Ballblazer
  • Implemented RANDOM (read) and SKCTLS (write) for Pokey sound emulation
    • Ballblazer now plays all sounds
  • Minor refactor of Pokey code
  • Some minor adjustments to the Light Gun related code
  • Updated palette (from Underball)
  • Updated menu code, GX rendering of dip switches and debug information
  • Ability to set HBLANK period, Dual-analog support in ProSystem database

0.2 - June 29, 2009

  • Lightgun support
  • High score cartridge support
  • Increased accuracy of Maria cycle timing, games now run at close to their intended speed (One on One, Tower Toppler, Summer Games, KLAX, Karateka, etc.)
  • Increased compatibility for PAL games (Ballblazer, Commando, and Food Fight now work)
  • Audio now sounds as it should regardless of frequency (PAL games and custom frame rates)
  • Timers now properly take into consideration cycles generated via Maria and during WSYNC
  • Changes to ProSystem database format
    • Maria cycles are now enabled by default (option 0x1 now disables Maria, the opposite of before)
    • Ability to adjust the lightgun crosshair offset per game
  • All games now have Maria cycles and WSYNC enabled in the ProSystem database (with the exception of MIA)
  • Console switch defaults updated to work with the majority of games
  • Additions to debug output (Maria vs. CPU cycles, timer info, etc.)
  • Other games improved by various changes
    • Kung Fu Master no longer has the lines in the upper left corner of display and the Fuji logo appears as it should (if using BIOS)
    • Midnight Mutants has less graphical glitches
    • Summer Games has less graphical glitches
    • Plutos has slightly less graphical glitches
  • Fixed save/restore state issue for games that use RIOT timers.

0.1 - May 26, 2009

  • Snapshot support, including auto-load/auto-save
  • Optional loading of 7800 BIOS
  • Support for ProSystem emulator database
  • Detects and configures controls for one and two button 7800 games
  • Controls support for Wiimote/Nunchuk/Classic/Gamecube controllers
  • Analog controls support
  • Dual analog support for Gamecube/Classic controllers (Robotron)
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