Changeset 322 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h

Timestamp:

Mar 11, 2012, 4:17:46 PM (13 years ago)

Author:

krille_n_@…

google:author:

krille_n_@hotmail.com

Message:

Changes to XTIDE Universal BIOS:

• Commented out the FS and GS segment registers from INTPACK since we never touch them anyway.
• Minor changes to improve speed in the Int13h handler.
• Changed Prepare_ByValidatingSectorsInALforOldInt13h so it really doesn't corrupt anything.
• Changed the makefile so 'make strings' now works even if StringsCompressed.asm is missing or empty.

Location:

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h

Files:

• AH25h_HDrvID.asm (modified) (1 diff)
• Tools/Prepare.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH25h_HDrvID.asm

@@ -22 +22 @@
 ALIGN JUMP_ALIGN
 AH25h_HandlerForGetDriveInformation:
-    mov     al, 1           ; Read 1 sector
-    call    Prepare_BufferToESSIforOldInt13hTransfer
-    mov     ah, COMMAND_IDENTIFY_DEVICE
+    mov     ax, (COMMAND_IDENTIFY_DEVICE << 8 | 1)      ; Read 1 sector
+    call    Prepare_BufferToESSIforOldInt13hTransfer    ; Preserves AX
     mov     bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
 %ifdef USE_186

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/Tools/Prepare.asm

@@ -111 +111 @@
     cmp     al, 128
     ja      SHORT InvalidNumberOfSectorsRequested
-    mov     ah, RET_HD_BOUNDARY
     test    si, si                              ; Offset must be zero to xfer 128 sectors
     jnz     SHORT CannotAlignPointerProperly
@@ -120 +119 @@
 Prepare_ReturnFromInt13hWithInvalidFunctionError:
     mov     ah, RET_HD_INVALID
+    SKIP2B  f
+CannotAlignPointerProperly:
+    mov     ah, RET_HD_BOUNDARY
 ZeroSectorsRequestedSoNoErrors:
-CannotAlignPointerProperly:
     jmp     Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH