CMOS.js

function bin_to_bcd(a){return((a/10)<<4)|(a%10);}
function CMOS(PC){var time_array,d;time_array=new Uint8Array(128);this.cmos_data=time_array;this.cmos_index=0;d=new Date();time_array[0]=bin_to_bcd(d.getUTCSeconds());time_array[2]=bin_to_bcd(d.getUTCMinutes());time_array[4]=bin_to_bcd(d.getUTCHours());time_array[6]=bin_to_bcd(d.getUTCDay());time_array[7]=bin_to_bcd(d.getUTCDate());time_array[8]=bin_to_bcd(d.getUTCMonth()+1);time_array[9]=bin_to_bcd(d.getUTCFullYear()%100);time_array[10]=0x26;time_array[11]=0x02;time_array[12]=0x00;time_array[13]=0x80;time_array[0x14]=0x02;PC.register_ioport_write(0x70,2,1,this.ioport_write.bind(this));PC.register_ioport_read(0x70,2,1,this.ioport_read.bind(this));}
CMOS.prototype.ioport_write=function(mem8_loc,data){if(mem8_loc==0x70){this.cmos_index=data&0x7f;}};CMOS.prototype.ioport_read=function(mem8_loc){var data;if(mem8_loc==0x70){return 0xff;}else{data=this.cmos_data[this.cmos_index];if(this.cmos_index==10)
this.cmos_data[10]^=0x80;else if(this.cmos_index==12)
this.cmos_data[12]=0x00;return data;}};