46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
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/*
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Fabrix - An annotated version of the original JSLinux which is Copyright (c) 2011 Fabrice Bellard
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Clock Emulator
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*/
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function Lg(a) { return ((a / 10) << 4) | (a % 10);}
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function CMOS(Ng) {
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var Og, d;
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Og = new Uint8Array(128);
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this.cmos_data = Og;
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this.cmos_index = 0;
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d = new Date();
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Og[0] = Lg(d.getUTCSeconds());
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Og[2] = Lg(d.getUTCMinutes());
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Og[4] = Lg(d.getUTCHours());
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Og[6] = Lg(d.getUTCDay());
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Og[7] = Lg(d.getUTCDate());
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Og[8] = Lg(d.getUTCMonth() + 1);
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Og[9] = Lg(d.getUTCFullYear() % 100);
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Og[10] = 0x26;
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Og[11] = 0x02;
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Og[12] = 0x00;
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Og[13] = 0x80;
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Og[0x14] = 0x02;
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Ng.register_ioport_write(0x70, 2, 1, this.ioport_write.bind(this));
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Ng.register_ioport_read(0x70, 2, 1, this.ioport_read.bind(this));
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}
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CMOS.prototype.ioport_write = function(mem8_loc, Ig) {
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if (mem8_loc == 0x70) {
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this.cmos_index = Ig & 0x7f;
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}
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};
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CMOS.prototype.ioport_read = function(mem8_loc) {
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var Pg;
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if (mem8_loc == 0x70) {
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return 0xff;
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} else {
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Pg = this.cmos_data[this.cmos_index];
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if (this.cmos_index == 10)
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this.cmos_data[10] ^= 0x80;
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else if (this.cmos_index == 12)
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this.cmos_data[12] = 0x00;
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return Pg;
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}
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};
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