diff --git a/src/driver/AHCI.pas b/src/driver/AHCI.pas
index 3774c772..6cf07ca1 100644
--- a/src/driver/AHCI.pas
+++ b/src/driver/AHCI.pas
@@ -83,8 +83,30 @@ type
         data      : ^uint32;
     end;
 
-    // TFIS_PIO_Setup = bitpacked record
-    // end;
+    TFIS_PIO_Setup = bitpacked record
+        fis_type : uint8;
+        pmport   : UBit4;
+        rsv0     : ubit1;
+        d        : ubit1;
+        i        : ubit1;
+        rsv1     : ubit1;
+        status   : uint8;
+        error    : uint8;
+        lba0     : uint8;
+        lba1     : uint8;
+        lba2     : uint8;
+        device   : uint8;
+        lba3     : uint8;
+        lba4     : uint8;
+        lba5     : uint8;
+        rsv2     : uint8;
+        countl   : uint8;
+        counth   : uint8;
+        rsv3     : uint8;
+        e_status : uint8;
+        tc       : uint16;
+        rsv4     : uint16;
+    end;
 
     // TFIS_DMA_Setup = bitpacked record
     // end;
@@ -98,8 +120,82 @@ type
     // THBA_FIS = bitpacked record
     // end;
 
+    THBA_PORT = bitpacked record
+        clb : uint32;
+        clbu : uint32;
+        fb : uint32;
+        fbu : uint32;
+        istat : uint32;
+        ie : uint32;
+        cmd : uint32;
+        rsv0 : uint32;
+        tfd : uint32;
+        sig : uint32;
+        ssts : uint32;
+        sctl : uint32;
+        serr : uint32;
+        sact : uint32;
+        ci : uint32;
+        sntf : uint32;
+        fbs : uint32;
+        rsv1[11] : uint32;
+        vendor[4] : uint32;
+    end; 
+
+    THBA_MEM = bitpacked record 
+        cap                 : uint32; //0
+        global_host_control : uint32; //4
+        interrupt_status    : uint32; //8
+        port_implemented    : uint32; //c
+        version             : uint32; //10
+        ccc_control         : uint32; //14
+        ccc_ports           : uint32; //18
+        em_location         : uint32; //1c
+        em_Control          : uint32; //20
+        hcap2               : uint32; //24
+        bohc                : uint32; //28
+        rsv0                : array[0..210] of ubit1;
+        ports               : array[0..31] of HBA_PORT;
+    end;
+
+    THBAptr : ^THBA_MEM;
+
+    TCommand_Header = bitpacked record
+        cfl    : ubit5;
+        a      : ubit1;
+        w      : ubit1;
+        p      : ubit1;
+        r      : ubit1;
+        b      : ubit1;
+        c      : ubit1;
+        rsv0   : ubit1;
+        pmp    : ubit4;
+        PRDTL  : uint16;
+        PRDTBC : uint32;
+        CTBA   : uint32;
+        CTBAU  : uint32;
+        rsv1   : array[0..3] of uint32;
+    end;
+
+    TPRD bitpacked record
+        data_base_address   : uint32;
+        data_bade_address_U : uint32;
+        rsv0                : uint32;
+        data_byte_count     : ubit22;
+        rsv1                : ubit9;
+        interrupt_oc        : ubit1;
+    end;
+
 var
+    //constants
+    SATA_SIG_ATA   := $101;
+    SATA_SIG_ATAPI := $EB140101;
+    SATA_SIG_SEMB  := $C33C0101;
+    STAT_SIG_PM    := $96690101;
+    //other
     PCI_Devices : TDeviceArray;
+    hba : THBAptr;
+    
 
 procedure init();
 
@@ -109,7 +205,8 @@ procedure init();
 var
     count : uint16;
 begin
-    //PCI_Devices := PCI.getDeviceInfo(1, 6, @count);
+    console.writestringln('AHCI: STARTING INIT');
+    PCI_Devices := PCI.getDeviceInfo(1, 6, 0, count);
 end;
 
 end.
\ No newline at end of file
diff --git a/src/system.pas b/src/system.pas
index 4f3f3ae0..66159cbe 100644
--- a/src/system.pas
+++ b/src/system.pas
@@ -61,7 +61,11 @@ type
     UBit5 = 0..(1 shl 5) - 1;
     UBit6 = 0..(1 shl 6) - 1;
     UBit7 = 0..(1 shl 7) - 1;
+    UBit9 = 0..(1 shl 9) - 1;
+    UBit17 = 0..(1 shl 17) - 1;
     UBit20 = 0..(1 shl 20) - 1;
+    UBit22 = 0..(1 shl 22) - 1;
+    UBit25 = 0..(1 shl 25) - 1;
     UBit28 = 0..(1 shl 28) - 1;
     UBit30 = 0..(1 shl 30) - 1;