Changeset 285 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH8h_HParams.asm

Timestamp:

Feb 29, 2012, 7:20:36 PM (12 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• Some minor optimizations.
• Boot menu now displays JR-IDE/ISA bus type (M8).
• Drive detection now displays ROM segment as JR-IDE/ISA Device address.

File:

• trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH8h_HParams.asm (modified) (5 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH8h_HParams.asm

@@ -18 +18 @@
 ;       CL:     Bits 7...6: Cylinder number bits 9...8
 ;               Bits 5...0: Maximum sector number (1...63)
-;       DH:     Maximum head number (0...255)
+;       DH:     Maximum head number (0...254)
 ;       DL:     Number of drives
 ;       ES:DI:  Floppy DPT (for floppies only)
@@ -79 +79 @@
 ;       CL:     Bits 7...6: Cylinder number bits 9...8
 ;               Bits 5...0: Maximum sector number (1...63)
-;       DH:     Maximum head number (0...255)
+;       DH:     Maximum head number (0...254)
 ;   Corrupts registers:
 ;       AX, BX
@@ -93 +93 @@
 ;   Parameters:
 ;       AX:     Number of L-CHS cylinders available (1...1024)
-;       BL:     Number of L-CHS heads (1...256)
+;       BL:     Number of L-CHS heads (1...255)
 ;       BH:     Number of L-CHS sectors per track (1...63)
 ;       DS:     RAMVARS segment
@@ -100 +100 @@
 ;       CL:     Bits 7...6: Cylinder number bits 9...8
 ;               Bits 5...0: Maximum sector number (1...63)
-;       DH:     Maximum head number (0...255)
+;       DH:     Maximum head number (0...254)
 ;   Corrupts registers:
 ;       AX, BX
@@ -112 +112 @@
     or      cl, bh                  ; CL bits 0...5 = Sectors per track
     mov     dh, bl                  ; DH = Maximum head number
-        
+
 %ifdef MODULE_SERIAL_FLOPPY
     mov     bl,[di+DPT.bFlagsHigh]