JaC64 Test page

Thanks for trying JaC64, a 100% Java C64 emulator. You can find more information about JaC64 at jac64.com, and (old site) dreamfabric. If everything is working, you should see a running JaC64 below (and some instructions).

Joakim Eriksson, joakim@jac64.com / joakim.eriksson@dreamfabric.com / joakime@sics.se

Reset, Joystick 0, Joystick 1, Sound off, Sound on
Pause, unPause, poke 53280,1, Fullscreen
Load Gorf,

Load Gorf, Load Blue Max, Load Demo, Load Music Insert disk1 Load dir...

JaC64 Features and Known Bugs

Feature:

CPU 6510, most of the 6510/02 instructions (inluding many undocumented)
RAM/ROM and Bank Switching (ROM - on / off, IO on / off)
Interrupts (IRQ, NMI) from raster, sprites, CIA timers, etc.
VIC Graphics (text modes, hi-res, multicolor) - instruction/cycle based, sprites (normal, expanded, multicolor, collisions)
SID (6581) Sound, with support for most of the SID features such as 3-oscillators/4 waveforms + mix, ADSR, synch., ring-mod, filters, etc.
CIA - timers
Keyboard & Joystick
Support for .d64 .prg/p00 and .t64 files (directly into memory)
Support for 1541 - e.g. loading .d64 files from an emulated diskdrive
New fullscreen mode activated/deactivated by pressing control-f12

Known Bugs:

VIC-II emulation is not yet 100% correct (see the demos/music here)
Some instruction are also not 100% correct (and/or interrupts handling)
SID is not 100% cycle correct

Requirements to run the applet

A JRE (1.4 or better) is required, and you need to have a folder called "roms" with the rom files for the C64 for the applet to work. From version 1.0 Beta 3 this folder is no longer needed since the rom files are included in the jar file.

Controlling the C64

Joystick emulation:

Up: Numpad 8 or arrow up
Down: Numpad 5,2 or arrow down
Left: Numpad 4 or arrow left
Right: Numpad 6 or arrow right
Fire: Numpad 0 or shift

Other important keys

ctrl-alt-backspace: resets the emulator
ctrl-f12: toggle fullscreen mode
ESC: run-stop

Parameters to the applet

Parameter	Usage
autostartDisk = URL/File	The disk/tape image to load file from
autostartPGM = Filename	The file from the disk/tape image
autostartProgram = file number	The file number (id) of the program in the games.txt file
soundOn = 0/1	The status of sound (0 mutes applet)
doubleScreen = 0/1	if set to 1 the emulator will be running in double size mode

Thanks to

[2002] Jan Blok - reimplementation of memory model and fixing CPU bugs
[2006] Jörg Jahnke - help with refactoring of CPU class
[2006] ByteMaster of Cache64.com - extensive testing and bug reporting huge thanks!