rks       = false;
	this.enableXO           = true;
	this.screenRotation     = 0;//must be 0, 90, 180, or 270
	this.maxSize            = 3584;
	this.touchInputMode     = 'none';
	this.maskFormatOverride = true;
	this.numericFormatStr   = "default";
	this.fontStyle          = 'octo';
	this.audioVolume        = 0.25;

	// interpreter state
	this.p  = [[],[]];  // pixels
	this.m  = [];       // memory (bytes)
	this.r  = [];       // return stack
	this.v  = [];       // registers
	this.pc = 0;        // program