Changeset 169 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/EBIOS/AH48h_GetExtendedDriveParameters.asm

Timestamp:

Aug 21, 2011, 4:39:58 PM (13 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• Old Int 13h functions can now transfer 256 sectors per call.
• eINT 13h functions can now transfer 65535 sectors per call.

File:

• trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/EBIOS/AH48h_GetExtendedDriveParameters.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/EBIOS/AH48h_GetExtendedDriveParameters.asm

@@ -34 +34 @@
     call    AH25h_GetDriveInformationToBufferInESSI
     jc      SHORT .ReturnWithError
-    call    AtaID_GetTotalSectorCountToBXDXAXfromAtaInfoInESSI
-    xchg    cx, ax      ; Sector count now in BX:DX:CX
 
-    ; Point ES:DI to Destination buffer
+    ; Point DS:DI to Destination buffer
     mov     di, [bp+IDEPACK.intpack+INTPACK.si]
-    mov     es, [bp+IDEPACK.intpack+INTPACK.ds]
+    mov     ds, [bp+IDEPACK.intpack+INTPACK.ds]
     mov     ax, MINIMUM_EDRIVEINFO_SIZE
-    cmp     WORD [es:di+EDRIVE_INFO.wSize], ax
-    jb      SHORT .BufferTooSmall
+    cmp     WORD [di+EDRIVE_INFO.wSize], ax
+    jb      SHORT AH42h_ReturnWithInvalidFunctionError
     je      SHORT .SkipEddConfigurationParameters
 
@@ -48 +46 @@
     xor     ax, ax
     dec     ax          ; AX = FFFFh
-    mov     [es:di+EDRIVE_INFO.fpEDDparams], ax
-    mov     [es:di+EDRIVE_INFO.fpEDDparams+2], ax
+    mov     [di+EDRIVE_INFO.fpEDDparams], ax
+    mov     [di+EDRIVE_INFO.fpEDDparams+2], ax
     mov     ax, EDRIVE_INFO_size
 
-    ; Fill Extended Drive Information Table in ES:DI
+    ; Fill Extended Drive Information Table in DS:DI
 .SkipEddConfigurationParameters:
-    stosw               ; Store Extended Drive Information Table size
-    mov     al, FLG_DMA_BOUNDARY_ERRORS_HANDLED_BY_BIOS
-    stosw
-    add     di, BYTE 12 ; Skip CHS parameters
-    xchg    ax, cx
-    stosw               ; LBA WORD 0
-    xchg    ax, dx
-    stosw               ; LBA WORD 1
-    xchg    ax, bx
-    stosw               ; LBA WORD 2
-    xor     ax, ax
-    stosw               ; LBA WORD 3 always zero since 48-bit address
-    mov     ah, 512>>8
-    stosw               ; Always 512-byte sectors
+    mov     [di+EDRIVE_INFO.wSize], ax
+    mov     WORD [di+EDRIVE_INFO.wFlags], FLG_DMA_BOUNDARY_ERRORS_HANDLED_BY_BIOS | FLG_CHS_INFORMATION_IS_VALID
+
+    call    AtaID_GetPCHStoAXBLBHfromAtaInfoInESSI
+    xor     cx, cx
+    mov     [di+EDRIVE_INFO.dwCylinders], ax
+    mov     [di+EDRIVE_INFO.dwCylinders+2], cx
+    eMOVZX  ax, bl
+    mov     [di+EDRIVE_INFO.dwHeads], ax
+    mov     [di+EDRIVE_INFO.dwHeads+2], cx
+    mov     al, bh
+    mov     [di+EDRIVE_INFO.dwSectorsPerTrack], ax
+    mov     [di+EDRIVE_INFO.dwSectorsPerTrack+2], cx
+
+    call    AtaID_GetTotalSectorCountToBXDXAXfromAtaInfoInESSI
+    mov     [di+EDRIVE_INFO.qwTotalSectors], ax
+    mov     [di+EDRIVE_INFO.qwTotalSectors+2], dx
+    mov     [di+EDRIVE_INFO.qwTotalSectors+4], bx
+    mov     [di+EDRIVE_INFO.qwTotalSectors+6], cx
+
+    mov     WORD [di+EDRIVE_INFO.wSectorSize], 512
 
     ; Return with success
     xor     ah, ah
-    jmp     Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
-
-.BufferTooSmall:
-    mov     ah, RET_HD_INVALID
 .ReturnWithError:
     jmp     Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH