Changeset 262 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm

Timestamp:

Feb 24, 2012, 10:28:31 AM (13 years ago)

Author:

gregli@…

google:author:

gregli@hotmail.com

Message:

More optimizations. Merged RamVars_IsFunction/DriveHandledByThisBIOS in with FindDPT_ForDriveNumber, since they are often used together, making a returned NULL DI pointer indicate a foreign drive in many places. Revamped the iteration done in the handlers for int13/0dh and int13h/0h. Added serial specific print string during drive detection.

File:

• trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm (modified) (1 diff)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm

@@ -26 +26 @@
 
     call    RamVars_GetSegmentToDS
+        
     call    DriveXlate_ToOrBack
     mov     [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl
-    call    RamVars_IsFunctionHandledByThisBIOS
-    jc      SHORT Int13h_DirectCallToAnotherBios
-
-    call    FindDPT_ForDriveNumber      ; DS:DI now points to DPT
-
+        
+    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
+
+    cmp     ah, 0
+    jz      short .OurFunction                      ; we handle all function 0h requests (resets)
+    cmp     ah, 8
+%ifdef MODULE_SERIAL_FLOPPY
+    jnz     SHORT Int13h_DirectCallToAnotherBios    ; we handle all traffic for function 08h, 
+                                                    ; as we need to wrap both hard disk and floppy drive counts
+%else
+    jz      SHORT .WeHandleTheFunction              ; we handle all *hard disk* (only) traffic for function 08h, 
+                                                    ; as we need to wrap the hard disk drive count
+    test    dl, dl
+    jns     SHORT Int13h_DirectCallToAnotherBios
+%endif      
+                
+.OurFunction:   
     ; Jump to correct BIOS function
     eMOVZX  bx, ah