Changeset 249 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/EBIOS/AH42h_ExtendedReadSectors.asm

Timestamp:

Feb 16, 2012, 1:56:36 PM (12 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• Number of successfully transferred sectors is now returned by all transfer functions (instead of requested sector count).
• Added INT 19h handler for proper reboot.

File:

• trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/EBIOS/AH42h_ExtendedReadSectors.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/EBIOS/AH42h_ExtendedReadSectors.asm

@@ -20 +20 @@
 ;       CF:     0 if succesfull, 1 if error
 ;   Return with Disk Address Packet in INTPACK:
-;       .bSectorCount   Number of sectors read successfully
+;       .wSectorCount   Number of sectors read successfully
 ;--------------------------------------------------------------------
 ALIGN JUMP_ALIGN
@@ -27 +27 @@
     mov     ah, [cs:bx+g_rgbReadCommandLookup]
     mov     bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
-%ifdef USE_186
-    push    Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
-    jmp     Idepack_ConvertDapToIdepackAndIssueCommandFromAH
-%else
     call    Idepack_ConvertDapToIdepackAndIssueCommandFromAH
+    ; Fall to AH42h_ReturnFromInt13hAfterStoringErrorCodeFromAHandTransferredSectorsFromCX
+
+
+;--------------------------------------------------------------------
+; AH42h_ReturnFromInt13hAfterStoringErrorCodeFromAHandTransferredSectorsFromCX
+;   Parameters:
+;       AH:     INT 13h Error Code
+;       CX:     Number of successfully transferred sectors
+;       SS:BP:  Ptr to IDEPACK
+;   Returns:
+;       Nothing, jumps to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
+;   Corrupts registers:
+;       SI, DS
+;--------------------------------------------------------------------
+AH42h_ReturnFromInt13hAfterStoringErrorCodeFromAHandTransferredSectorsFromCX:
+    mov     ds, [bp+IDEPACK.intpack+INTPACK.ds]
+    mov     si, [bp+IDEPACK.intpack+INTPACK.si]
+    mov     [si+DAP.wSectorCount], cx
     jmp     Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
-%endif