Changeset 259 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h

Timestamp:

Feb 23, 2012, 7:14:06 AM (13 years ago)

Author:

gregli@…

google:author:

gregli@hotmail.com

Message:

For function int13/0h, restored the code to only reset the floppy drives if a floppy drive was passed in for reset. Other minor optimizations. Better create new floppy support in Serial Server.

File:

• trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH0h_HReset.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH0h_HReset.asm

@@ -22 +22 @@
     eMOVZX  bx, dl                      ; Copy requested drive to BL, zero BH to assume no errors
     call    ResetFloppyDrivesWithInt40h
+
+%ifdef MODULE_SERIAL_FLOPPY
+;
+; "Reset" emulatd serial floppy drives, if any.  There is nothing to actually do for this reset,
+; but record the proper error return code if one of these floppy drives is the drive requested.
+;
+    call    RamVars_UnpackFlopCntAndFirstToAL
+    cbw                                                 ; Clears AH (there are flop drives) or ffh (there are not)
+                                                        ; Either AH has success code (flop drives are present)
+                                                        ; or it doesn't matter because we won't match drive ffh
+
+    cwd                                                 ; clears DX (there are flop drives) or ffffh (there are not)
+
+    adc     dl, al                                      ; second drive (CF set) if present
+                                                        ; If no drive is present, this will result in ffh which 
+                                                        ; won't match a drive
+    call    BackupErrorCodeFromTheRequestedDriveToBH
+    mov     dl, al                                      ; We may end up doing the first drive twice (if there is
+    call    BackupErrorCodeFromTheRequestedDriveToBH    ; only one drive), but doing it again is not harmful.
+%endif
+
+    test    bl, bl                                      ; If we were called with a floppy disk, then we are done,
+    jns     SHORT .SkipHardDiskReset                    ; don't do hard disks.
+        
     call    ResetForeignHardDisks
     call    AH0h_ResetHardDisksHandledByOurBIOS
@@ -129 +153 @@
     jb      SHORT .DriveResetLoop       ;  If not, reset next drive
 .AllDrivesReset:
-%ifdef MODULE_SERIAL_FLOPPY
-;
-; "Reset" emulatd serial floppy drives, if any.  There is nothing to actually do for this reset,
-; but record the proper error return code if one of these floppy drives is the drive requested.
-;
-    call    RamVars_UnpackFlopCntAndFirstToAL
-
-    cbw                                                 ; Clears AH (there are flop drives) or ffh (there are not)
-                                                        ; Either AH has success code (flop drives are present)
-                                                        ; or it doesn't matter because we won't match drive ffh
-
-    cwd                                                 ; clears DX (there are flop drives) or ffffh (there are not)
-
-    adc     dl, al                                      ; second drive (CF set) if present
-                                                        ; If no drive is present, this will result in ffh which 
-                                                        ; won't match a drive
-    call    BackupErrorCodeFromTheRequestedDriveToBH
-    mov     dl, al                                      ; We may end up doing the first drive twice (if there is
-    jmp     BackupErrorCodeFromTheRequestedDriveToBH    ; only one drive), but doing it again is not harmful.
-%else
-    ret
-%endif
-        
+    ret
+
+                
 ;--------------------------------------------------------------------
 ; .BackupErrorCodeFromMasterOrSlaveToBH