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; c) class 1, subclass 1, programming interface 0x85
        mov     ax, 0xB103
        mov     ecx, 1*10000h + 1*100h + 0x85
        mov     [es:BOOT_IDE_PI_16], cx
        xor     si, si  ; device index = 0
        int     0x1A
        jnc     .found

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; d) class 1, subclass 1, programming interface 0x8A
; This is a Parallel IDE Controller which uses IRQs 14 and 15.
        mov     ax, 0xB103
        mov     ecx, 1*10000h + 1*100h + 0x8A
        mov     [es:BOOT_IDE_PI_16], cx
        xor     si, si  ; device index = 0
        int     0x1A
        jnc     .found_1 ; Parallel IDE Controller

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K : BAR0 0001 
K : BAR1 0001 
K : BAR2 0001 
K : BAR3 0001 
K : BAR4 0000 
K : IDEContrProgrammingInterface 018A

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outl((1 << 31) | (bus << 16) | (device << 11) | (func << 8) | 8, 0xCF8); // Send the parameters.
if ((inl(0xCFC) >> 16) != 0xFFFF) { // If device exists (class isn't 0xFFFF)
   // Check if this device needs an IRQ assignment:
   outl((1 << 31) | (bus << 16) | (device << 11) | (func << 8) | 0x3C, 0xCF8); // Read the interrupt line field
   outb(0xFE, 0xCFC); // Change the IRQ field to 0xFE
   outl((1 << 31) | (bus << 16) | (device << 11) | (func << 8) | 0x3C, 0xCF8); // Read the interrupt line field
   if ((inl(0xCFC) & 0xFF) == 0xFE) {
      // This device needs an IRQ assignment.
   } else {
      // The device doesn't use IRQs, check if this is an Parallel IDE:
      if (class == 0x01 && subclass == 0x01 && (ProgIF == 0x8A || ProgIF == 0x80)) {
         // This is a Parallel IDE Controller which uses IRQs 14 and 15.
      }
   }
}