Changeset 167 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/EBIOS/AH48h_GetExtendedDriveParameters.asm

Timestamp:

Aug 21, 2011, 3:42:15 PM (13 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• Old Int 13h transfer functions work again.
• Fixes to eINT13h (EBIOS) support.

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

@@ -23 +23 @@
 ALIGN JUMP_ALIGN
 AH48h_HandlerForGetExtendedDriveParameters:
-    ; Get ATA Drive Information and total sector count from it
+    ; Get our buffer to ES:SI
+    push    di
+    call    FindDPT_ForNewDriveToDSDI
+    lea     si, [di+LARGEST_DPT_SIZE]   ; IdeCommand.asm required fake DPT
+    pop     di
     push    ds
-    pop     es          ; ES now points RAMVARS segment
-    mov     si, [cs:ROMVARS.bStealSize]
-    and     si, BYTE 7Fh
-    eSHL_IM si, 10      ; Kilobytes to bytes
-    sub     si, 512     ; Subtract buffer size for offset in RAMVARS
-    call    AH25h_GetDriveInformationToBufferInESSIfromDriveInDL
+    pop     es
+
+    ; Get Drive ID and total sector count from it
+    call    AH25h_GetDriveInformationToBufferInESSI
+    jc      SHORT .ReturnWithError
     call    AtaID_GetTotalSectorCountToBXDXAXfromAtaInfoInESSI
-    xchg    cx, ax
+    xchg    cx, ax      ; Sector count now in BX:DX:CX
 
     ; Point ES:DI to Destination buffer
     mov     di, [bp+IDEPACK.intpack+INTPACK.si]
     mov     es, [bp+IDEPACK.intpack+INTPACK.ds]
-    cmp     WORD [es:di+EDRIVE_INFO.wSize], MINIMUM_EDRIVEINFO_SIZE
+    mov     ax, MINIMUM_EDRIVEINFO_SIZE
+    cmp     WORD [es:di+EDRIVE_INFO.wSize], ax
     jb      SHORT .BufferTooSmall
+    je      SHORT .SkipEddConfigurationParameters
+
+    ; We do not support EDD Configuration Parameters so set to FFFF:FFFFh
+    xor     ax, ax
+    dec     ax          ; AX = FFFFh
+    mov     [es:di+EDRIVE_INFO.fpEDDparams], ax
+    mov     [es:di+EDRIVE_INFO.fpEDDparams+2], ax
+    mov     ax, EDRIVE_INFO_size
 
     ; Fill Extended Drive Information Table in ES:DI
-    mov     ax, MINIMUM_EDRIVEINFO_SIZE
-    stosw
+.SkipEddConfigurationParameters:
+    stosw               ; Store Extended Drive Information Table size
     mov     al, FLG_DMA_BOUNDARY_ERRORS_HANDLED_BY_BIOS
     stosw
@@ -63 +75 @@
 .BufferTooSmall:
     mov     ah, RET_HD_INVALID
+.ReturnWithError:
     jmp     Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH