Changeset 218 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Device/Idepack.asm

Timestamp:

Jan 23, 2012, 9:10:05 PM (13 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• Number of sectors to transfer is now limited to 1-128 for old INT 13h functions.

File:

• trunk/XTIDE_Universal_BIOS/Src/Device/Idepack.asm (modified) (5 diffs)

trunk/XTIDE_Universal_BIOS/Src/Device/Idepack.asm

@@ -40 +40 @@
 Idepack_ConvertDapToIdepackAndIssueCommandFromAH:
     mov     [bp+IDEPACK.bCommand], ah
-    mov     ax, [es:si+DAP.wSectorCount]
+    mov     al, [es:si+DAP.bSectorCount]
     mov     [bp+IDEPACK.bSectorCount], al
-    mov     [bp+IDEPACK.bSectorCountHighExt], ah
 
     mov     al, [es:si+DAP.qwLBA]       ; LBA byte 0
@@ -66 +65 @@
 ;   Parameters:
 ;       AH:     IDE command to issue
-;       AL:     Number of sectors to transfer (1...255, 0=256)
+;       AL:     Number of sectors to transfer
 ;       BH:     Timeout ticks
 ;       BL:     IDE Status Register flag to wait after command
@@ -73 +72 @@
 ;               Bits 5...0: Starting sector number (1...63)
 ;       DH:     Starting head number (0...255)
-;       ES:SI:  Ptr to data buffer
 ;       DS:DI:  Ptr to DPT (in RAMVARS segment)
-;       SS:BP:  Ptr to IDEPACK
+;       SS:BP:  Ptr to IDEPACK (containing INTPACK)
+;   Parameters on INTPACK:
+;       ES:BX:  Ptr to data buffer
 ;   Returns:
 ;       AH:     INT 13h Error Code
@@ -84 +84 @@
 ALIGN JUMP_ALIGN
 Idepack_TranslateOldInt13hAddressAndIssueCommandFromAH:
+    mov     [bp+IDEPACK.bSectorCount], al
     mov     [bp+IDEPACK.bCommand], ah
 
-    xor     ah, ah
-    cmp     ah, al
-    cmc
-    adc     ah, ah
-
-    mov     [bp+IDEPACK.bSectorCount], al
-    mov     [bp+IDEPACK.bSectorCountHighExt], ah
-
     push    bx
+    call    PrepareBuffer_ToESSIforOldInt13hTransfer
     call    Address_OldInt13hAddressToIdeAddress
     call    AccessDPT_GetDriveSelectByteToAL
@@ -135 +129 @@
     mov     [bp+IDEPACK.wSectorCountAndLbaLow], dx
     mov     [bp+IDEPACK.wLbaMiddleAndHigh], cx
-    mov     BYTE [bp+IDEPACK.bSectorCountHighExt], 0
 
     ; Drive and Head select byte