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Jnes
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Guide by Gent
Views: 69684
Date: Monday, August 29 - 2005
Using
Using & Configuration
(Overview of Program)
It is quite easy to get started, below this you'll find more detailed information on Jnes and how to configure it. Generally to get started make sure you are running in the best color/colour depth, and simply open a rom-image from the file menu. This program also features a simple file browser that is enabled by default, you don't have to use it, but if you would like to browse a specific directory to check out mapper numbers, etc, this is a really handy to use and it also supports zip files.
Features
CPU
All 6502 opcodes, Emulated bugs in the 6502, IRQ and NMI, Battery backed RAM
PPU
8x16 and 8x8 sprites with transparency and priority, background tiles
internal default palette and palette loader for external palettes
all common internal VRAM mirroring methods, VROM and VRAM tile memory
APU
Nintendo MMC1, MMC2, MMC3, MMC4, MMC5 (partial)
Triangle, Noise, Complete PCM, Konami VRC6 Sound chip
Mappers
Nintendo MMC1, MMC2, MMC3, MMC4, MMC5 (partial)
iNES 0, 2, 3, 6, 7, 8, 11, 21, 23, 24, 25, 32, 34, 66, 69, 71, 79, 113
Peripherals
Controllers 1 and 2, Zapper gun
Extras
GameGenie and Pro Action Replay support, Fullscreen and Windowed mode, Screen capture (Bitmap), Record audio output
Save and Load nes state from file (11 slots)
Configurable input, Sound output graph, Rom browser
Realtime patching of ROMS using the IPS format
ZIP file loading
Input Controls
Everything is fully configurable for input see the proper dialog box for the defaults and details on how you can configure each controller and devices attached to your computer. To use the Zapper go into the player 2 configure dialog, select connected to zapper, and use your mouse as the zapper, move it over things, and click to shoot. You can see how to set up your Input by clicking on Help and Controller on the top navigation menu.
International Patching System
Jnes has the ability to apply IPS files if they are present when loading a rom image automatically. IPS files are commonly used to translate a game to another language, or more generally alter the games content such as graphics, program code, etc. To use this feature simply make sure the IPS file is in the same directory as the rom you are about to load, and make sure the IPS file is the same name as the rom image.
Example: if you wished to apply an IPS file to "Megaman 2 (U).nes" your patch should be in the same directory named "Megaman 2 (U).IPS". This is a convenient feature so you can ...
maintain the original rom image
use the latest patches easily
save some disk space?
In the settings dialog there is an option that will make Jnes ask you before applying any patches it finds, or doing it without asking. See the dialog for more information. If you want some patches, visit the message board and links sections of the Jnes website.
Keyboard Shortcuts
Alt+Enter toggles windowed and full screen mode
ESC can be used in full screen to go back to windowed instead of above
F1 Resets
F2 Toggles pause
F3 Capture the screen
F4 Recording sound
F5 Save a state to file
F7 Load a state from file
There are a total of 11 save states available, they use the file extensions .js0 through .js9, the default state extension is .jst.
To change slots you may select the slot via the CPU menu, and also via keyboard shortcuts, the ~ key on the keyboard selects the default '.jst' slot for saves, and the keys next to it, 0 through 9, change the states accordingly (.js0 through .js9) The save slot setting is set back to the default .jst file extension at the load of a game.
Save Files
All save states and sram are stored in a subdirectory called "saves" If you don't store the save files in this subdirectory Jnes won't see them, and Jnes automatically creates these directories on first-time saves so you don't have to do it yourself. But if you are importing or exporting a SRAM (".sav" file) file from another emulator keep this in mind. Important Note: It can be generally assumed that the save state format changes between versions of Jnes,this is because as the internal structures change, the states as a result may.
Cheats
For using cheats go to the Help and Cheating section on the top navigation menu. For more information on using Cheats on Jnes please refer to the Jnes Cheats Website Or the Cheat Offline Help Chm that comes already Packed with Jnes via HelpUsing Cheats.
Kaillera Support - Netplay
Kaillera support currently is implemented, but it's probably not perfect due to the nature of networked gaming and emulation, things are bound to come up if you are not careful. The only trick to using it so far is exiting a game currently in progress, the first step is to close the ROM out in Jnes, doing File/Close causing Jnes to stop executing the game and requesting data from Kaillera, than exit the kaillera dialogs properly, than if you wish, exit Jnes. Using zipped roms are also implemented.
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