Changeset 568 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs/AtaGeometry.asm

Timestamp:

Dec 21, 2014, 5:37:53 PM (9 years ago)

Author:

krille_n_@…

google:author:

krille_n_@hotmail.com

Message:

Changes:

• SerDrive: Using named pipe mode (serdrive -p) now works under Windows XP/2000/Server 2003.
• checksum.pl: Added a compatibility fix for 3Com 3C503 cards.
• XTIDECFG will now scan every possible segment address to find and load the BIOS and/or its settings from EEPROM. This should simplify things for people using combined option ROMs.
• Fixed a bug from r521 in BootSector.asm where the BIOS would not display a timeout error if it failed to load the boot sector from harddrive.
• Fixed a bug from r541 in CompatibleDPT.asm where CompatibleDPT_CreateDeviceParameterTableExtensionToESBXfromDPTinDSSI would generate an invalid checksum in the DPTE.
• Optimizations and other fixes.

File:

• trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs/AtaGeometry.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs/AtaGeometry.asm

@@ -142 +142 @@
 ; GetSectorCountToDXAXfromCHSinAXBLBH
 ;   Parameters:
-;       ES:SI:  Ptr to 512-byte ATA information read from the drive
 ;       AX:     Number of cylinders (1...16383)
 ;       BL:     Number of heads (1...255)
@@ -328 +327 @@
     cmp     ax, cx
     jbe     SHORT .NumberOfHeadsNowInCX
-    eSHL_IM cl, 1                       ; Double number of heads
-    jnz     SHORT .CompareNextValidNumberOfHeads    ; Reached 256 heads?
-    dec     cl                          ;  If so, limit heads to 255
+    eSHL_IM cx, 1                       ; Double number of heads
+    jpo     SHORT .CompareNextValidNumberOfHeads    ; Reached 256 heads?
+    dec     cx                          ;  If so, limit heads to 255
 .NumberOfHeadsNowInCX:
     mov     bx, cx                      ; Number of heads are returned in BL