Changeset 161 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs/AccessDPT.asm

Timestamp:

May 8, 2011, 8:02:52 PM (13 years ago)

Author:

krille_n_@…

google:author:

krille_n_@hotmail.com

Message:

Changes to XTIDE Universal BIOS:

• Minor size optimizations.
• Tried to minimize the time spent with interrupts disabled in IdeIrq.asm and Int13h.asm

File:

• trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs/AccessDPT.asm (modified) (1 diff)

trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs/AccessDPT.asm

@@ -71 +71 @@
 ALIGN JUMP_ALIGN
 AccessDPT_GetLCHSfromPCHS:
-    xchg    ax, cx
-    mov     cl, [di+DPT.bFlagsLow]
-    and     cl, MASKL_DPT_CHS_SHIFT_COUNT   ; Load shift count
+    mov     al, [di+DPT.bFlagsLow]
+    and     al, MASKL_DPT_CHS_SHIFT_COUNT   ; Load shift count
+    xchg    cx, ax
     mov     bx, [di+DPT.wPchsCylinders]     ; Load P-CHS cylinders
     shr     bx, cl                          ; Shift to L-CHS cylinders
     xchg    cx, ax
-    eMOVZX  dx, BYTE [di+DPT.bLchsHeads]    ; Load L-CHS heads
     eMOVZX  ax, BYTE [di+DPT.bPchsSectors]  ; Load Sectors per track
+    cwd
+    mov     dl, [di+DPT.bLchsHeads]         ; Load L-CHS heads
     ret