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

Timestamp:

Mar 11, 2012, 4:17:46 PM (12 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.

File:

• trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm (modified) (3 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm

@@ -30 +30 @@
     mov     [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl
 
-    call    FindDPT_ForDriveNumberInDL              ; DS:DI points to our DPT, or NULL if not our drive
-    jnc     SHORT .OurFunction                      ; DPT found, this is one of our drives, and thus our function
-
-    test    ah, ah
-    jz      SHORT .OurFunction                      ; we handle all function 0h requests (resets)
-    cmp     ah, 8
-    jne     SHORT Int13h_DirectCallToAnotherBios    ; non-8h function, handled by foreign bios
-
-%ifndef MODULE_SERIAL_FLOPPY
-; With floppy support, we handle all traffic for function 08h, as we need to wrap both hard disk and
-; floppy drive counts.  Without floppy support, we handle only hard disk traffic for function 08h,
-; and thus need the check below.
-;
-    test    dl, dl
-    jns     SHORT Int13h_DirectCallToAnotherBios
-%endif
+    call    FindDPT_ForDriveNumberInDL  ; DS:DI points to our DPT, or NULL if not our drive
+    jc      SHORT .NotOurDrive          ; DPT not found so this is not one of our drives
 
 .OurFunction:
@@ -65 +51 @@
     test    BYTE [di+DPT.bFlagsLow], FLG_DRVNHEAD_LBA
     jz      SHORT Int13h_UnsupportedFunction    ; No eINT 13h for CHS drives
+    sub     bl, 41h<<1                  ; BX = Offset to eINT 13h jump table
+    jb      SHORT Int13h_UnsupportedFunction
     cmp     ah, 48h
     ja      SHORT Int13h_UnsupportedFunction
-    sub     bl, 41h<<1                  ; BX = Offset to eINT 13h jump table
-    jb      SHORT Int13h_UnsupportedFunction
     jmp     [cs:bx+g_rgwEbiosFunctionJumpTable]
 %endif
 
+ALIGN JUMP_ALIGN
+.NotOurDrive:
+    test    ah, ah
+    jz      SHORT .OurFunction          ; We handle all function 0h requests (resets)
+
+%ifndef MODULE_SERIAL_FLOPPY
+; Without floppy support, we handle only hard disk traffic for function 08h.
+    test    dl, dl
+    jns     SHORT Int13h_DirectCallToAnotherBios
+%endif
+; With floppy support, we handle all traffic for function 08h, as we need to wrap both hard disk and floppy drive counts.
+    cmp     ah, 8
+    je      SHORT .OurFunction
+    ; Fall to Int13h_DirectCallToAnotherBios
 
 ;--------------------------------------------------------------------
@@ -103 +103 @@
     pop     bp  ; Standard INT 13h functions never uses BP as return register
 %ifdef USE_386
-    mov     [bp+IDEPACK.intpack+INTPACK.gs], gs
-    mov     [bp+IDEPACK.intpack+INTPACK.fs], fs
+;   mov     [bp+IDEPACK.intpack+INTPACK.gs], gs
+;   mov     [bp+IDEPACK.intpack+INTPACK.fs], fs
 %endif
     mov     [bp+IDEPACK.intpack+INTPACK.es], es