ChipsXDAabout 2 hours ago
Linux still uses 1984 keyboard-controller reset
1 min read
The 1984 IBM PC/AT's Intel 8042 keyboard-controller reset survives on modern x86 platforms. Linux tries ACPI first, then the keyboard-controller reset as its second reboot method. Writing 0xFE to port 0x64 pulses the system-reset line, a legacy interface predating the chipset reset-control register by decades.
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