power.c

#include "types.h"

typedef struct {
 uint8_t ac_status; // 0 = Battery, 1 = Plugged in (AC Power), 0xFF = Unknown
 uint8_t battery_status; // 0 = High, 1 = Low, 2 = Critical, 3 = Charging
 uint8_t battery_percent; // 0% - 100% (0xFF = Unknown)
} PowerStatus;

// Basic ACPI/QEMU Power Off trigger via Port 0x604
void power_off(void) {
 // Shutdown command sent to QEMU / Bochs emulator ACPI port
 outb(0x604, 0x00); // Magic shutdown value
 outb(0x604, 0x20); 
 
 // Fallback APM shutdown via port 0xB004
 outb(0xB004, 0x2000);
}