diff --git a/kernel/trunk/blkdev/hd_drv.inc b/kernel/trunk/blkdev/hd_drv.inc
index 79b37e049c..633e56a4aa 100644
--- a/kernel/trunk/blkdev/hd_drv.inc
+++ b/kernel/trunk/blkdev/hd_drv.inc
@@ -9,20 +9,6 @@ $Revision$
 ; Low-level driver for HDD access
 ; DMA support by Mario79
 
-;**************************************************************************
-;
-;   0x600008  - first entry in cache list
-;
-;            +0   - lba sector
-;            +4   - state of cache sector
-;                   0 = empty
-;                   1 = used for read  ( same as in hd )
-;                   2 = used for write ( differs from hd )
-;
-;      +65536 - cache entries
-;
-;**************************************************************************
-
 align 4
 hd_read:
 ;-----------------------------------------------------------
@@ -32,8 +18,11 @@ hd_read:
         and     [hd_error], 0
     push  ecx esi edi           ; scan cache
 
-    mov   ecx,cache_max         ; entries in cache
-    mov   esi,HD_CACHE+8
+;    mov   ecx,cache_max         ; entries in cache
+;    mov   esi,HD_CACHE+8
+    call  calculate_cache
+    add   esi,8
+    
     mov   edi,1
 
   hdreadcache:
@@ -64,8 +53,12 @@ hd_read:
 .nodma:
         call    hd_read_pio
 @@:
+;    lea   esi,[edi*8+HD_CACHE]
+;    push  eax
+    call  calculate_cache_1
+    lea   esi,[edi*8+esi]
+;    pop   eax
 
-    lea   esi,[edi*8+HD_CACHE]
     mov   [esi],eax             ; sector number
     mov   dword [esi+4],1       ; hd read - mark as same as in hd
 
@@ -73,7 +66,12 @@ hd_read:
 
     mov   esi,edi
     shl   esi,9
-    add   esi,HD_CACHE+65536
+;    add   esi,HD_CACHE+65536
+    push  eax
+    call  calculate_cache_2
+    add   esi,eax
+    pop   eax
+    
     mov   edi,ebx
     mov   ecx,512/4
     cld
@@ -126,7 +124,12 @@ hd_read_pio:
     cli
     push  edi
     shl   edi,9
-    add   edi,HD_CACHE+65536
+;    add   edi,HD_CACHE+65536
+    push  eax
+    call  calculate_cache_2
+    add   edi,eax
+    pop   eax
+    
     mov   ecx,256
     mov   edx,[hdbase]
     cld
@@ -163,8 +166,11 @@ hd_write:
 
     ; check if the cache already has the sector and overwrite it
 
-    mov   ecx,cache_max
-    mov   esi,HD_CACHE+8
+;    mov   ecx,cache_max
+;    mov   esi,HD_CACHE+8
+    call  calculate_cache
+    add   esi,8
+    
     mov   edi,1
 
   hdwritecache:
@@ -189,7 +195,12 @@ hd_write:
     cmp   [hd_error],0
     jne   hd_write_access_denied
 
-    lea   esi,[edi*8+HD_CACHE]
+;    lea   esi,[edi*8+HD_CACHE]
+;    push  eax
+    call  calculate_cache_1
+    lea   esi,[edi*8+esi]
+;    pop   eax
+
     mov   [esi],eax             ; sector number
 
   yes_in_cache_write:
@@ -197,7 +208,12 @@ hd_write:
     mov   dword [esi+4],2       ; write - differs from hd
 
     shl   edi,9
-    add   edi,HD_CACHE+65536
+;    add   edi,HD_CACHE+65536
+    push  eax
+    call  calculate_cache_2
+    add   edi,eax
+    pop   eax
+    
     mov   esi,ebx
     mov   ecx,512/4
     cld
@@ -206,98 +222,15 @@ hd_write:
     pop   edi esi ecx
     ret
 
-
-write_cache:
-;-----------------------------------------------------------
-; write all changed sectors to disk
-;-----------------------------------------------------------
-    push  eax ecx edx esi edi
-
-    ; write difference ( 2 ) from cache to hd
-
-    mov   ecx,cache_max
-    mov   esi,HD_CACHE+8
-    mov   edi,1
-
-  write_cache_more:
-
-    cmp   dword [esi+4],2       ; if cache slot is not different
-    jne   .write_chain
-
-    mov   dword [esi+4],1       ; same as in hd
-    mov   eax,[esi]             ; eax = sector to write
-
-    cmp   eax,[PARTITION_START]
-    jb    danger
-    cmp   eax,[PARTITION_END]
-    ja    danger
-
-; DMA write is permitted only if [allow_dma_access]=1
-        cmp     [allow_dma_access], 2
-        jae     .nodma
-        cmp     [dma_hdd], 1
-        jnz     .nodma
-; Объединяем запись цепочки последовательных секторов в одно обращение к диску
-        cmp     ecx, 1
-        jz      .nonext
-        cmp     dword [esi+8+4], 2
-        jnz     .nonext
-        push    eax
-        inc     eax
-        cmp     eax, [esi+8]
-        pop     eax
-        jnz     .nonext
-        cmp     [cache_chain_started], 1
-        jz      @f
-        mov     [cache_chain_started], 1
-        mov     [cache_chain_size], 0
-        mov     [cache_chain_pos], edi
-        mov     [cache_chain_ptr], esi
-@@:
-        inc     [cache_chain_size]
-        cmp     [cache_chain_size], 64
-        jnz     .continue
-        jmp     .write_chain
-.nonext:
-        call    flush_cache_chain
-        mov     [cache_chain_size], 1
-        mov     [cache_chain_ptr], esi
-        call    write_cache_sector
-        jmp     .continue
-.nodma:
-        call    cache_write_pio
-.write_chain:
-        call    flush_cache_chain
-
-.continue:
-  danger:
-
-    add   esi,8
-    inc   edi
-    dec   ecx
-    jnz   write_cache_more
-        call    flush_cache_chain
- return_02:
-    pop   edi esi edx ecx eax
-    ret
-
-flush_cache_chain:
-        cmp     [cache_chain_started], 0
-        jz      @f
-        call    write_cache_chain
-        mov     [cache_chain_started], 0
-@@:
-        ret
-
 align 4
 cache_write_pio:
-    call  disable_ide_int
-
+;    call  disable_ide_int
+    
     call  wait_for_hd_idle
     cmp   [hd_error],0
     jne   hd_write_error
 
-;    cli
+    cli
     xor   eax,eax
     mov   edx,[hdbase]
     inc   edx
@@ -323,7 +256,7 @@ cache_write_pio:
     inc   edx
     mov   al,30h
     out   dx,al
-;    sti
+    sti
 
     call  wait_for_sector_buffer
 
@@ -332,75 +265,26 @@ cache_write_pio:
 
     push  ecx esi
 
-;    cli
+    cli
     mov   esi,edi
     shl   esi,9
-    add   esi,HD_CACHE+65536    ; esi = from memory position
+;    add   esi,HD_CACHE+65536    ; esi = from memory position
+    push  eax
+    call  calculate_cache_2
+    add   esi,eax
+    pop   eax
+    
     mov   ecx,256
     mov   edx,[hdbase]
     cld
     rep   outsw
-;    sti
+    sti
 
-    call  enable_ide_int
+;    call  enable_ide_int
     pop   esi ecx
 
     ret
 
-align 4
-find_empty_slot:
-;-----------------------------------------------------------
-; find empty or read slot, flush cache if next 10% is used by write
-; output : edi = cache slot
-;-----------------------------------------------------------
-;    push  ecx esi
-
-  search_again:
-
-    mov   ecx,cache_max*10/100
-    mov   edi,[cache_search_start]
-
-  search_for_empty:
-
-    inc   edi
-    cmp   edi,cache_max
-    jbe   inside_cache
-    mov   edi,1
-
-  inside_cache:
-
-    cmp   dword [edi*8+HD_CACHE+4],2    ; get cache slot info
-    jb    found_slot                    ; it's empty or read
-    dec   ecx
-    jnz   search_for_empty
-
-    call  write_cache                   ; no empty slots found, write all
-    cmp   [hd_error],0
-    jne   found_slot_access_denied
-
-    jmp   search_again                  ; and start again
-
-  found_slot:
-
-    mov   [cache_search_start],edi
-  found_slot_access_denied:
-    ret
-
-align 4
-clear_hd_cache:
-
-    push  eax ecx edi
-    mov   edi, HD_CACHE
-    mov   ecx,16384
-    xor   eax,eax
-    cld
-    rep   stosd                 ; clear hd cache with 0
-    mov   [cache_search_start],eax
-    mov   [fat_in_cache],-1
-    mov   [fat_change],0
-    pop   edi ecx eax
-    ret
-
 save_hd_wait_timeout:
 
     push  eax
@@ -684,7 +568,12 @@ hd_read_dma:
         push    ecx esi edi
         mov     esi, eax
         shl     edi, 9
-        add     edi, HD_CACHE+0x10000
+;        add     edi, HD_CACHE+0x10000
+        push  eax
+        call  calculate_cache_2
+        add   edi,eax
+        pop   eax
+        
         mov     ecx, 512/4
         cld
         rep     movsd
@@ -774,26 +663,27 @@ hd_read_dma:
         jmp     hd_read_dma
 
 align 4
-write_cache_chain:
-        push    esi
-        mov     eax, IDE_descriptor_table
-        mov     edx, [cache_chain_pos]
-        shl     edx, 9
-        add     edx, DMA_HD_MEM+0x10000
-        mov     [eax], edx
-        movzx   edx, [cache_chain_size]
-        shl     edx, 9
-        mov     [eax+4], dx
-        jmp     do_write_dma
 write_cache_sector:
+        mov     [cache_chain_size],1
+        mov     [cache_chain_pos],edi
+write_cache_chain:        
         push    esi
         mov     eax, IDE_descriptor_table
-        mov     edx, edi
-        shl     edx, 9
-        add     edx, DMA_HD_MEM+0x10000
-        mov     [eax], edx
-        mov     word [eax+4], 0x200
-do_write_dma:
+        mov     edx,eax
+        pusha
+        mov     esi,[cache_chain_pos]
+        shl     esi, 9
+        call    calculate_cache_2
+        add     esi,eax
+        mov     edi,OS_BASE+0x284000   ;HD_CACHE
+        mov     dword [edx], 0x284000  ;DMA_HD_MEM
+        movzx   ecx, [cache_chain_size]
+        shl     ecx, 9
+        mov     word [edx+4], cx
+        shr     ecx,2
+        cld
+        rep movsd
+        popa
         sub     eax, OS_BASE
         mov     dx, [IDEContrRegsBaseAddr]
         cmp     [hdbase], 0x1F0
diff --git a/kernel/trunk/blkdev/ide_cache.inc b/kernel/trunk/blkdev/ide_cache.inc
new file mode 100644
index 0000000000..760c658bde
--- /dev/null
+++ b/kernel/trunk/blkdev/ide_cache.inc
@@ -0,0 +1,457 @@
+;**************************************************************************
+;
+;   [cache_ide[X]_pointer]
+;   or [cache_ide[X]_data_pointer]  first entry in cache list
+;
+;            +0   - lba sector
+;            +4   - state of cache sector
+;                   0 = empty
+;                   1 = used for read  ( same as in hd )
+;                   2 = used for write ( differs from hd )
+;
+;  [cache_ide[X]_system_data]
+;  or [cache_ide[x]_appl_data] - cache entries
+;
+;**************************************************************************
+align 4
+write_cache:
+;-----------------------------------------------------------
+; write all changed sectors to disk
+;-----------------------------------------------------------
+    push  eax ecx edx esi edi
+
+    ; write difference ( 2 ) from cache to hd
+
+;    mov   ecx,cache_max
+;    mov   esi,HD_CACHE+8
+    call  calculate_cache
+    add   esi,8
+    
+    mov   edi,1
+
+  write_cache_more:
+
+    cmp   dword [esi+4],2       ; if cache slot is not different
+    jne   .write_chain
+
+    mov   dword [esi+4],1       ; same as in hd
+    mov   eax,[esi]             ; eax = sector to write
+
+    cmp   eax,[PARTITION_START]
+    jb    danger
+    cmp   eax,[PARTITION_END]
+    ja    danger
+
+; DMA write is permitted only if [allow_dma_access]=1
+        cmp     [allow_dma_access], 2
+        jae     .nodma
+        cmp     [dma_hdd], 1
+        jnz     .nodma
+; Объединяем запись цепочки последовательных секторов в одно обращение к диску
+        cmp     ecx, 1
+        jz      .nonext
+        cmp     dword [esi+8+4], 2
+        jnz     .nonext
+        push    eax
+        inc     eax
+        cmp     eax, [esi+8]
+        pop     eax
+        jnz     .nonext
+        cmp     [cache_chain_started], 1
+        jz      @f
+        mov     [cache_chain_started], 1
+        mov     [cache_chain_size], 0
+        mov     [cache_chain_pos], edi
+        mov     [cache_chain_ptr], esi
+@@:
+        inc     [cache_chain_size]
+        cmp     [cache_chain_size], 64
+        jnz     .continue
+        jmp     .write_chain
+.nonext:
+        call    flush_cache_chain
+        mov     [cache_chain_size], 1
+        mov     [cache_chain_ptr], esi
+        call    write_cache_sector
+        jmp     .continue
+.nodma:
+        call    cache_write_pio
+.write_chain:
+        call    flush_cache_chain
+
+.continue:
+  danger:
+
+    add   esi,8
+    inc   edi
+    dec   ecx
+    jnz   write_cache_more
+        call    flush_cache_chain
+ return_02:
+    pop   edi esi edx ecx eax
+    ret
+
+flush_cache_chain:
+        cmp     [cache_chain_started], 0
+        jz      @f
+        call    write_cache_chain
+        mov     [cache_chain_started], 0
+@@:
+        ret
+        
+
+align 4
+find_empty_slot:
+;-----------------------------------------------------------
+; find empty or read slot, flush cache if next 10% is used by write
+; output : edi = cache slot
+;-----------------------------------------------------------
+;    push  ecx esi
+
+  search_again:
+
+;    mov   ecx,cache_max*10/100
+;    mov   edi,[cache_search_start]
+    call  calculate_cache_3
+;    push  eax edx
+;    mov   eax,ecx
+;    mov   ecx,10
+;    xor   edx,edx
+;    div  ecx
+;    mov   ecx,eax
+;    pop   edx eax
+    shr   ecx,3    
+  search_for_empty:
+
+    inc   edi
+;    cmp   edi,cache_max
+;    push   eax
+    call  calculate_cache_4
+;    cmp   edi,eax
+;    pop   eax
+    jbe   inside_cache
+    mov   edi,1
+
+  inside_cache:
+
+;    cmp   dword [edi*8+HD_CACHE+4],2    ; get cache slot info
+    push   esi
+    call  calculate_cache_1
+    cmp   dword [edi*8+esi+4],2
+    pop   esi
+    jb    found_slot                    ; it's empty or read
+    dec   ecx
+    jnz   search_for_empty
+
+    call  write_cache                   ; no empty slots found, write all
+    cmp   [hd_error],0
+    jne   found_slot_access_denied
+
+    jmp   search_again                  ; and start again
+
+  found_slot:
+
+;    mov   [cache_search_start],edi
+    call  calculate_cache_5
+  found_slot_access_denied:
+    ret
+
+align 4
+clear_hd_cache:
+;    push  eax ecx edi
+;    mov   edi, HD_CACHE
+;    mov   ecx,16384
+;    xor   eax,eax
+;    cld
+;    rep   stosd                 ; clear hd cache with 0
+;    mov   [cache_search_start],eax
+    mov   [fat_in_cache],-1
+    mov   [fat_change],0
+;    pop   edi ecx eax
+    ret
+    
+;--------------------------------------------------------------------
+align 4
+calculate_cache:
+;    mov   ecx,cache_max         ; entries in cache
+;    mov   esi,HD_CACHE+8
+
+; 1 - IDE0 ... 4 - IDE3
+.ide0:
+    cmp    [hdpos],1
+    jne    .ide1
+    cmp    [hdd_appl_data],0
+    jne    .ide0_appl_data
+    mov    ecx,[cache_ide0_system_sad_size]
+    mov    esi,[cache_ide0_pointer]
+    ret
+.ide0_appl_data:
+    mov    ecx,[cache_ide0_appl_sad_size]
+    mov    esi,[cache_ide0_data_pointer]
+    ret
+.ide1:
+    cmp    [hdpos],2
+    jne    .ide2
+    cmp    [hdd_appl_data],0
+    jne    .ide1_appl_data
+    mov    ecx,[cache_ide1_system_sad_size]
+    mov    esi,[cache_ide1_pointer]
+    ret
+.ide1_appl_data:
+    mov    ecx,[cache_ide1_appl_sad_size]
+    mov    esi,[cache_ide1_data_pointer]
+    ret
+.ide2:
+    cmp    [hdpos],3
+    jne    .ide3
+    cmp    [hdd_appl_data],0
+    jne    .ide2_appl_data
+    mov    ecx,[cache_ide2_system_sad_size]
+    mov    esi,[cache_ide2_pointer]    
+    ret
+.ide2_appl_data:
+    mov    ecx,[cache_ide2_appl_sad_size]
+    mov    esi,[cache_ide2_data_pointer]
+    ret
+.ide3:
+    cmp    [hdd_appl_data],0
+    jne    .ide3_appl_data
+    mov    ecx,[cache_ide3_system_sad_size]
+    mov    esi,[cache_ide3_pointer]      
+    ret
+.ide3_appl_data:
+    mov    ecx,[cache_ide3_appl_sad_size]
+    mov    esi,[cache_ide3_data_pointer]
+    ret
+;--------------------------------------------------------------------
+align 4
+calculate_cache_1:
+;    lea   esi,[edi*8+HD_CACHE]
+; 1 - IDE0 ... 4 - IDE3
+.ide0:
+    cmp    [hdpos],1
+    jne    .ide1
+    cmp    [hdd_appl_data],0
+    jne    .ide0_appl_data
+    mov    esi,[cache_ide0_pointer]
+    ret
+.ide0_appl_data:
+    mov    esi,[cache_ide0_data_pointer]
+    ret
+.ide1:
+    cmp    [hdpos],2
+    jne    .ide2
+    cmp    [hdd_appl_data],0
+    jne    .ide1_appl_data
+    mov    esi,[cache_ide1_pointer]
+    ret
+.ide1_appl_data:
+    mov    esi,[cache_ide1_data_pointer]
+    ret
+.ide2:
+    cmp    [hdpos],3
+    jne    .ide3
+    cmp    [hdd_appl_data],0
+    jne    .ide2_appl_data
+    mov    esi,[cache_ide2_pointer]
+    ret
+.ide2_appl_data:
+    mov    esi,[cache_ide2_data_pointer]
+    ret
+.ide3:
+    cmp    [hdd_appl_data],0
+    jne    .ide3_appl_data
+    mov    esi,[cache_ide3_pointer]    
+    ret
+.ide3_appl_data:
+    mov    esi,[cache_ide3_data_pointer]
+    ret
+;--------------------------------------------------------------------
+align 4
+calculate_cache_2:
+;    add   esi,HD_CACHE+65536
+; 1 - IDE0 ... 4 - IDE3
+.ide0:
+    cmp    [hdpos],1
+    jne    .ide1
+    cmp    [hdd_appl_data],0
+    jne    .ide0_appl_data
+    mov    eax,[cache_ide0_system_data]    
+    ret
+.ide0_appl_data:
+    mov    eax,[cache_ide0_appl_data]
+    ret
+.ide1:
+    cmp    [hdpos],2
+    jne    .ide2
+    cmp    [hdd_appl_data],0
+    jne    .ide1_appl_data
+    mov    eax,[cache_ide1_system_data]
+    ret
+.ide1_appl_data:
+    mov    eax,[cache_ide1_appl_data]
+    ret
+.ide2:
+    cmp    [hdpos],3
+    jne    .ide3
+    cmp    [hdd_appl_data],0
+    jne    .ide2_appl_data
+    mov    eax,[cache_ide2_system_data]
+    ret
+.ide2_appl_data:
+    mov    eax,[cache_ide2_appl_data]
+    ret
+.ide3:
+    cmp    [hdd_appl_data],0
+    jne    .ide3_appl_data
+    mov    eax,[cache_ide3_system_data]    
+    ret
+.ide3_appl_data:
+    mov    eax,[cache_ide3_appl_data]
+    ret
+;--------------------------------------------------------------------
+align 4
+calculate_cache_3:
+;    mov   ecx,cache_max*10/100
+;    mov   edi,[cache_search_start]
+
+; 1 - IDE0 ... 4 - IDE3
+.ide0:
+    cmp    [hdpos],1
+    jne    .ide1
+    cmp    [hdd_appl_data],0
+    jne    .ide0_appl_data
+    mov    ecx,[cache_ide0_system_sad_size]
+    mov    edi,[cache_ide0_search_start]
+    ret
+.ide0_appl_data:
+    mov    ecx,[cache_ide0_appl_sad_size]
+    mov    edi,[cache_ide0_appl_search_start]
+    ret
+.ide1:
+    cmp    [hdpos],2
+    jne    .ide2
+    cmp    [hdd_appl_data],0
+    jne    .ide1_appl_data
+    mov    ecx,[cache_ide1_system_sad_size]
+    mov    edi,[cache_ide1_search_start]
+    ret
+.ide1_appl_data:
+    mov    ecx,[cache_ide1_appl_sad_size]
+    mov    edi,[cache_ide1_appl_search_start]
+    ret
+.ide2:
+    cmp    [hdpos],3
+    jne    .ide3
+    cmp    [hdd_appl_data],0
+    jne    .ide2_appl_data
+    mov    ecx,[cache_ide2_system_sad_size]
+    mov    edi,[cache_ide2_search_start]    
+    ret
+.ide2_appl_data:
+    mov    ecx,[cache_ide2_appl_sad_size]
+    mov    edi,[cache_ide2_appl_search_start]
+    ret
+.ide3:
+    cmp    [hdd_appl_data],0
+    jne    .ide3_appl_data
+    mov    ecx,[cache_ide3_system_sad_size]
+    mov    edi,[cache_ide3_search_start]      
+    ret
+.ide3_appl_data:
+    mov    ecx,[cache_ide3_appl_sad_size]
+    mov    edi,[cache_ide3_appl_search_start]
+    ret
+;--------------------------------------------------------------------
+align 4
+calculate_cache_4:
+;    cmp   edi,cache_max
+; 1 - IDE0 ... 4 - IDE3
+.ide0:
+    cmp    [hdpos],1
+    jne    .ide1
+    cmp    [hdd_appl_data],0
+    jne    .ide0_appl_data
+    cmp   edi,[cache_ide0_system_sad_size]
+    ret
+.ide0_appl_data:
+    cmp   edi,[cache_ide0_appl_sad_size]
+    ret
+.ide1:
+    cmp    [hdpos],2
+    jne    .ide2
+    cmp    [hdd_appl_data],0
+    jne    .ide1_appl_data
+    cmp   edi,[cache_ide1_system_sad_size]
+    ret
+.ide1_appl_data:
+    cmp   edi,[cache_ide1_appl_sad_size]
+    ret
+.ide2:
+    cmp    [hdpos],3
+    jne    .ide3
+    cmp    [hdd_appl_data],0
+    jne    .ide2_appl_data
+    cmp   edi,[cache_ide2_system_sad_size]
+    ret
+.ide2_appl_data:
+    cmp   edi,[cache_ide2_appl_sad_size]
+    ret
+.ide3:
+    cmp    [hdd_appl_data],0
+    jne    .ide3_appl_data
+    cmp   edi,[cache_ide3_system_sad_size]
+    ret
+.ide3_appl_data:
+    cmp   edi,[cache_ide3_appl_sad_size]
+    ret
+;--------------------------------------------------------------------
+align 4
+calculate_cache_5:
+;    mov   [cache_search_start],edi
+; 1 - IDE0 ... 4 - IDE3
+.ide0:
+    cmp    [hdpos],1
+    jne    .ide1
+    cmp    [hdd_appl_data],0
+    jne    .ide0_appl_data
+    mov   [cache_ide0_search_start],edi    
+    ret
+.ide0_appl_data:
+    mov   [cache_ide0_appl_search_start],edi
+    ret
+.ide1:
+    cmp    [hdpos],2
+    jne    .ide2
+    cmp    [hdd_appl_data],0
+    jne    .ide1_appl_data
+    mov   [cache_ide1_search_start],edi
+    ret
+.ide1_appl_data:
+    mov   [cache_ide1_appl_search_start],edi
+    ret
+.ide2:
+    cmp    [hdpos],3
+    jne    .ide3
+    cmp    [hdd_appl_data],0
+    jne    .ide2_appl_data
+    mov   [cache_ide2_search_start],edi
+    ret
+.ide2_appl_data:
+    mov   [cache_ide2_appl_search_start],edi
+    ret
+.ide3:
+    cmp    [hdd_appl_data],0
+    jne    .ide3_appl_data
+    mov   [cache_ide3_search_start],edi    
+    ret
+.ide3_appl_data:
+    mov   [cache_ide3_appl_search_start],edi
+    ret
+;--------------------------------------------------------------------
+align 4
+calculate_linear_to_real:
+    shr eax, 12
+    mov eax, [page_tabs+eax*4] 
+    and eax, 0xFFFFF000
+    ret
diff --git a/kernel/trunk/const.inc b/kernel/trunk/const.inc
index 801074c91e..8961830599 100644
--- a/kernel/trunk/const.inc
+++ b/kernel/trunk/const.inc
@@ -292,8 +292,8 @@ RESERVED_PORTS      equ (OS_BASE+0x02D0000)
 IRQ_SAVE            equ (OS_BASE+0x02E0000)
 BOOT_VAR            equ (OS_BASE+0x02f0000)
 
-DMA_HD_MEM          equ 0x0300000
-HD_CACHE            equ (OS_BASE+DMA_HD_MEM)
+; DMA_HD_MEM          equ 0x0300000
+; HD_CACHE            equ (OS_BASE+DMA_HD_MEM)
 
 stack_data_start    equ (OS_BASE+0x0400000)
 eth_data_start      equ (OS_BASE+0x0400000)
diff --git a/kernel/trunk/data32.inc b/kernel/trunk/data32.inc
index f4e74ff484..389e8584d8 100644
--- a/kernel/trunk/data32.inc
+++ b/kernel/trunk/data32.inc
@@ -337,6 +337,57 @@ img_background        rd 1
 mem_BACKGROUND        rd 1
 wraw_bacground_select rb 1
 
+cache_ide0_pointer            rd 1
+cache_ide0_size               rd 1   ; not use
+cache_ide0_data_pointer       rd 1
+cache_ide0_system_data_size   rd 1   ; not use
+cache_ide0_appl_data_size     rd 1   ; not use
+cache_ide0_system_data        rd 1
+cache_ide0_appl_data          rd 1
+cache_ide0_system_sad_size    rd 1
+cache_ide0_appl_sad_size      rd 1
+cache_ide0_search_start       rd 1
+cache_ide0_appl_search_start  rd 1
+
+cache_ide1_pointer            rd 1
+cache_ide1_size               rd 1   ; not use
+cache_ide1_data_pointer       rd 1
+cache_ide1_system_data_size   rd 1   ; not use
+cache_ide1_appl_data_size     rd 1   ; not use
+cache_ide1_system_data        rd 1
+cache_ide1_appl_data          rd 1
+cache_ide1_system_sad_size    rd 1
+cache_ide1_appl_sad_size      rd 1
+cache_ide1_search_start       rd 1
+cache_ide1_appl_search_start  rd 1
+
+cache_ide2_pointer            rd 1
+cache_ide2_size               rd 1   ; not use
+cache_ide2_data_pointer       rd 1
+cache_ide2_system_data_size   rd 1   ; not use
+cache_ide2_appl_data_size     rd 1   ; not use
+cache_ide2_system_data        rd 1
+cache_ide2_appl_data          rd 1
+cache_ide2_system_sad_size    rd 1
+cache_ide2_appl_sad_size      rd 1
+cache_ide2_search_start       rd 1
+cache_ide2_appl_search_start  rd 1
+
+cache_ide3_pointer            rd 1
+cache_ide3_size               rd 1   ; not use
+cache_ide3_data_pointer       rd 1
+cache_ide3_system_data_size   rd 1   ; not use
+cache_ide3_appl_data_size     rd 1   ; not use
+cache_ide3_system_data        rd 1
+cache_ide3_appl_data          rd 1
+cache_ide3_system_sad_size    rd 1
+cache_ide3_appl_sad_size      rd 1
+cache_ide3_search_start       rd 1
+cache_ide3_appl_search_start  rd 1
+
+debug_step_pointer rd 1
+hdd_appl_data rb 1 ; 0 = system cache, 1 - application cache
+
 lba_read_enabled      rd 1  ; 0 = disabled , 1 = enabled
 pci_access_enabled    rd 1  ; 0 = disabled , 1 = enabled
 timer_ticks_enable rb 1 	; for cd driver
diff --git a/kernel/trunk/detect/disks.inc b/kernel/trunk/detect/disks.inc
index 09102e6a57..f386048178 100644
--- a/kernel/trunk/detect/disks.inc
+++ b/kernel/trunk/detect/disks.inc
@@ -1,5 +1,6 @@
 $Revision$
 include 'dev_fd.inc'
 include 'dev_hdcd.inc'
+include 'getcache.inc'
 include 'sear_par.inc'
 
diff --git a/kernel/trunk/detect/getcache.inc b/kernel/trunk/detect/getcache.inc
new file mode 100644
index 0000000000..08a79b7488
--- /dev/null
+++ b/kernel/trunk/detect/getcache.inc
@@ -0,0 +1,389 @@
+;cache_ide0_pointer          dd 0
+;cache_ide0_size             dd 0   ; not use
+;cache_ide0_data_pointer     dd 0
+;cache_ide0_system_data_size dd 0   ; not use
+;cache_ide0_appl_data_size   dd 0   ; not use
+;cache_ide0_system_data      dd 0
+;cache_ide0_appl_data        dd 0
+;cache_ide0_system_sad_size  dd 0
+;cache_ide0_appl_sad_size    dd 0
+
+    pusha
+
+    mov  eax,[pg_data.pages_free]
+;   1/32
+    shr eax,5
+;   round off up to 8 pages
+    shr eax,3
+    shl eax,3
+;   translate pages in butes *4096
+    shl eax,12
+;	check a upper size of the cache, no more than 1 Mb on the physical device
+    cmp  eax,1024*1024
+    jbe  @f
+    mov  eax,1024*1024
+    jmp  .continue
+@@:
+;	check a lower size of the cache, not less than 128 Kb on the physical device
+    cmp  eax,128*1024
+    jae  @f
+    mov  eax,128*1024
+@@:
+.continue:
+    mov  [cache_ide0_size],eax
+    mov  [cache_ide1_size],eax
+    mov  [cache_ide2_size],eax
+    mov  [cache_ide3_size],eax
+    xor  eax,eax
+    mov  [cache_ide0_search_start],eax
+    mov  [cache_ide0_appl_search_start],eax
+    mov  [cache_ide1_search_start],eax
+    mov  [cache_ide1_appl_search_start],eax
+    mov  [cache_ide2_search_start],eax
+    mov  [cache_ide2_appl_search_start],eax
+    mov  [cache_ide3_search_start],eax
+    mov  [cache_ide3_appl_search_start],eax
+    mov  [hdd_appl_data],1  ;al
+    
+    mov  cl,[DRIVE_DATA+1]
+    mov  ch,cl
+    and  cl,11b
+    cmp cl,0
+    je  .ide2
+    call get_cache_ide3
+.ide2:
+    mov  cl,ch
+    and  cl,1100b
+    cmp cl,0
+    je  .ide1
+    call get_cache_ide2
+.ide1:
+    mov  cl,ch
+    and  cl,110000b
+    cmp cl,0
+    je  .ide0
+    call get_cache_ide1
+.ide0:
+    mov  cl,ch
+    and  cl,11000000b
+    cmp cl,0
+    je  end_get_cache
+    call get_cache_ide0
+    jmp  end_get_cache
+
+get_cache_ide0:
+    push  ecx
+    stdcall kernel_alloc,[cache_ide0_size]
+    mov [cache_ide0_pointer],eax
+    pop   ecx
+    mov  edx,eax
+    mov  eax,[cache_ide0_size]
+    shr  eax,3
+    mov  [cache_ide0_system_data_size],eax
+    mov  ebx,eax
+    imul eax,7
+    mov  [cache_ide0_appl_data_size],eax
+    add  ebx,edx
+    mov  [cache_ide0_data_pointer],ebx
+    
+    cmp cl,10000000b
+    je  .cd
+    push ecx
+    mov  eax,[cache_ide0_system_data_size]
+    call calculate_for_hd
+    add  eax,[cache_ide0_pointer]
+    mov  [cache_ide0_system_data],eax
+    mov  [cache_ide0_system_sad_size],ecx
+    
+    push  edi
+    mov   edi,[cache_ide0_pointer]
+    call  clear_ide_cache
+    pop   edi
+    
+    mov  eax,[cache_ide0_appl_data_size]
+    call calculate_for_hd
+    add  eax,[cache_ide0_data_pointer]
+    mov  [cache_ide0_appl_data],eax
+    mov  [cache_ide0_appl_sad_size],ecx
+
+    push  edi
+    mov   edi,[cache_ide0_data_pointer]
+    call  clear_ide_cache
+    pop   edi
+    
+    pop  ecx
+    ret
+.cd:
+    push ecx
+    mov  eax,[cache_ide0_system_data_size]
+    call calculate_for_cd
+    add  eax,[cache_ide0_pointer]
+    mov  [cache_ide0_system_data],eax
+    mov  [cache_ide0_system_sad_size],ecx
+
+    push  edi
+    mov   edi,[cache_ide0_pointer]
+    call  clear_ide_cache
+    pop   edi
+    
+    mov  eax,[cache_ide0_appl_data_size]
+    call calculate_for_cd
+    add  eax,[cache_ide0_data_pointer]
+    mov  [cache_ide0_appl_data],eax
+    mov  [cache_ide0_appl_sad_size],ecx
+    
+    push  edi
+    mov   edi,[cache_ide0_data_pointer]
+    call  clear_ide_cache
+    pop   edi
+    
+    pop  ecx
+    ret
+    
+get_cache_ide1:
+    push  ecx
+    stdcall kernel_alloc,[cache_ide1_size]
+    mov [cache_ide1_pointer],eax
+    pop   ecx
+    mov  edx,eax
+    mov  eax,[cache_ide1_size]
+    shr  eax,3
+    mov  [cache_ide1_system_data_size],eax
+    mov  ebx,eax
+    imul eax,7
+    mov  [cache_ide1_appl_data_size],eax
+    add  ebx,edx
+    mov  [cache_ide1_data_pointer],ebx
+    
+    cmp cl,100000b
+    je  .cd
+    push ecx
+    mov  eax,[cache_ide1_system_data_size]
+    call calculate_for_hd
+    add  eax,[cache_ide1_pointer]
+    mov  [cache_ide1_system_data],eax
+    mov  [cache_ide1_system_sad_size],ecx
+
+    push  edi
+    mov   edi,[cache_ide1_pointer]
+    call  clear_ide_cache
+    pop   edi
+
+    mov  eax,[cache_ide1_appl_data_size]
+    call calculate_for_hd
+    add  eax,[cache_ide1_data_pointer]
+    mov  [cache_ide1_appl_data],eax
+    mov  [cache_ide1_appl_sad_size],ecx
+    
+    push  edi
+    mov   edi,[cache_ide1_data_pointer]
+    call  clear_ide_cache
+    pop   edi
+    
+    pop  ecx
+    ret
+.cd:
+    push ecx
+    mov  eax,[cache_ide1_system_data_size]
+    call calculate_for_cd
+    add  eax,[cache_ide1_pointer]
+    mov  [cache_ide1_system_data],eax
+    mov  [cache_ide1_system_sad_size],ecx
+
+    push  edi
+    mov   edi,[cache_ide1_pointer]
+    call  clear_ide_cache
+    pop   edi
+
+    mov  eax,[cache_ide1_appl_data_size]
+    call calculate_for_cd
+    add  eax,[cache_ide1_data_pointer]
+    mov  [cache_ide1_appl_data],eax
+    mov  [cache_ide1_appl_sad_size],ecx
+    
+    push  edi
+    mov   edi,[cache_ide1_data_pointer]
+    call  clear_ide_cache
+    pop   edi
+    
+    pop  ecx
+    ret
+
+get_cache_ide2:
+    push  ecx
+    stdcall kernel_alloc,[cache_ide2_size]
+    mov [cache_ide2_pointer],eax
+    pop   ecx
+    mov  edx,eax
+    mov  eax,[cache_ide2_size]
+    shr  eax,3
+    mov  [cache_ide2_system_data_size],eax
+    mov  ebx,eax
+    imul eax,7
+    mov  [cache_ide2_appl_data_size],eax
+    add  ebx,edx
+    mov  [cache_ide2_data_pointer],ebx
+    
+    cmp cl,1000b
+    je  .cd
+    push ecx
+    mov  eax,[cache_ide2_system_data_size]
+    call calculate_for_hd
+    add  eax,[cache_ide2_pointer]
+    mov  [cache_ide2_system_data],eax
+    mov  [cache_ide2_system_sad_size],ecx
+
+    push  edi
+    mov   edi,[cache_ide2_pointer]
+    call  clear_ide_cache
+    pop   edi
+
+    mov  eax,[cache_ide2_appl_data_size]
+    call calculate_for_hd
+    add  eax,[cache_ide2_data_pointer]
+    mov  [cache_ide2_appl_data],eax
+    mov  [cache_ide2_appl_sad_size],ecx
+    
+    push  edi
+    mov   edi,[cache_ide2_data_pointer]
+    call  clear_ide_cache
+    pop   edi
+    
+    pop  ecx
+    ret
+.cd:
+    push ecx
+    mov  eax,[cache_ide2_system_data_size]
+    call calculate_for_cd
+    add  eax,[cache_ide2_pointer]
+    mov  [cache_ide2_system_data],eax
+    mov  [cache_ide2_system_sad_size],ecx
+
+    push  edi
+    mov   edi,[cache_ide2_pointer]
+    call  clear_ide_cache
+    pop   edi
+
+    mov  eax,[cache_ide2_appl_data_size]
+    call calculate_for_cd
+    add  eax,[cache_ide2_data_pointer]
+    mov  [cache_ide2_appl_data],eax
+    mov  [cache_ide2_appl_sad_size],ecx
+    
+    push  edi
+    mov   edi,[cache_ide2_data_pointer]
+    call  clear_ide_cache
+    pop   edi
+    
+    pop  ecx
+    ret
+
+get_cache_ide3:
+    push  ecx
+    stdcall kernel_alloc,[cache_ide3_size]
+    mov [cache_ide3_pointer],eax
+    pop   ecx
+    mov  edx,eax
+    mov  eax,[cache_ide3_size]
+    shr  eax,3
+    mov  [cache_ide3_system_data_size],eax
+    mov  ebx,eax
+    imul eax,7
+    mov  [cache_ide3_appl_data_size],eax
+    add  ebx,edx
+    mov  [cache_ide3_data_pointer],ebx
+    
+    cmp cl,10b
+    je  .cd
+    push ecx
+    mov  eax,[cache_ide3_system_data_size]
+    call calculate_for_hd
+    add  eax,[cache_ide3_pointer]
+    mov  [cache_ide3_system_data],eax
+    mov  [cache_ide3_system_sad_size],ecx
+
+    push  edi
+    mov   edi,[cache_ide3_pointer]
+    call  clear_ide_cache
+    pop   edi
+
+    mov  eax,[cache_ide3_appl_data_size]
+    call calculate_for_hd
+    add  eax,[cache_ide3_data_pointer]
+    mov  [cache_ide3_appl_data],eax
+    mov  [cache_ide3_appl_sad_size],ecx
+    
+    push  edi
+    mov   edi,[cache_ide3_data_pointer]
+    call  clear_ide_cache
+    pop   edi
+    
+    pop  ecx
+    ret
+.cd:
+    push ecx
+    mov  eax,[cache_ide3_system_data_size]
+    call calculate_for_cd
+    add  eax,[cache_ide3_pointer]
+    mov  [cache_ide3_system_data],eax
+    mov  [cache_ide3_system_sad_size],ecx
+
+    push  edi
+    mov   edi,[cache_ide3_pointer]
+    call  clear_ide_cache
+    pop   edi
+
+    mov  eax,[cache_ide3_appl_data_size]
+    call calculate_for_cd
+    add  eax,[cache_ide3_data_pointer]
+    mov  [cache_ide3_appl_data],eax
+    mov  [cache_ide3_appl_sad_size],ecx
+    
+    push  edi
+    mov   edi,[cache_ide3_data_pointer]
+    call  clear_ide_cache
+    pop   edi
+    
+    pop  ecx
+    ret
+
+calculate_for_hd:
+    push eax
+    mov  ebx,eax
+    shr  eax,9
+    shl  eax,3
+    sub  ebx,eax
+    shr  ebx,9
+    mov  ecx,ebx
+    shl  ebx,9
+    pop  eax
+    sub  eax,ebx
+    ret
+
+calculate_for_cd:
+    push eax
+    mov  ebx,eax
+    shr  eax,11
+    shl  eax,3
+    sub  ebx,eax
+    shr  ebx,11
+    mov  ecx,ebx
+    shl  ebx,11
+    pop  eax
+    sub  eax,ebx
+    ret
+    
+clear_ide_cache:
+    push   eax
+    shl   ecx,1
+    xor   eax,eax
+    cld
+    rep   stosd
+    pop   eax
+    ret
+    
+end_get_cache:
+;    mov  [cache_ide0_pointer],HD_CACHE
+;    mov  [cache_ide0_system_data],HD_CACHE+65536
+;    mov  [cache_ide0_system_sad_size],1919
+    popa
\ No newline at end of file
diff --git a/kernel/trunk/kernel32.inc b/kernel/trunk/kernel32.inc
index ddfed01481..acfff4cb36 100644
--- a/kernel/trunk/kernel32.inc
+++ b/kernel/trunk/kernel32.inc
@@ -229,6 +229,9 @@ include "bus/pci/pci32.inc"
 include "blkdev/fdc.inc"
 include "blkdev/flp_drv.inc"
 
+; IDE cache
+include "blkdev/ide_cache.inc"
+
 ; HD drive controller
 include "blkdev/hd_drv.inc"
 
diff --git a/kernel/trunk/memmap.inc b/kernel/trunk/memmap.inc
index 3d0d986ca6..4a3c0b0809 100644
--- a/kernel/trunk/memmap.inc
+++ b/kernel/trunk/memmap.inc
@@ -176,7 +176,8 @@
 ; 0x80280000 -> 281FFF   ramdisk fat
 ; 0x80282000 -> 283FFF   floppy  fat
 ;
-; 0x80284000 -> 297FFF   free (80 Kb)
+; 0x80284000 -> 28BFFF   HDD DMA AREA
+; 0x8028C000 -> 297FFF   free (48 Kb)
 ;
 ; 0x80298000 -> 29ffff   auxiliary table for background smoothing code
 ;