Changeset 232 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS

Timestamp:

Feb 4, 2012, 12:42:17 PM (13 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• Minor improvements to AH=24h (Set Block Mode).

Location:

trunk/XTIDE_Universal_BIOS

Files:

• Inc/CustomDPT.inc (modified) (1 diff)
• Src/Handlers/Int13h/AH24h_HSetBlocks.asm (modified) (3 diffs)

trunk/XTIDE_Universal_BIOS/Inc/CustomDPT.inc

@@ -28 +28 @@
     .dpt                        resb    DPT_size
 
-    ; Block size is specified in sectors (1, 2, 4, 8, 16, 32 or 64).
-    ; 128 is not allowed to prevent offset overflow during data transfer.
+    ; Block size is specified in sectors (1, 2, 4, 8, 16, 32, 64 or 128)
     .wSetAndMaxBlock:
     .bSetBlock                  resb    1   ; Current block size (at least 1)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH24h_HSetBlocks.asm

@@ -20 +20 @@
 ;       CF:     0 if succesfull, 1 if error
 ;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
 AH24h_HandlerForSetMultipleBlocks:
-    test    BYTE [di+DPT.bFlagsHigh], FLGH_DPT_BLOCK_MODE_SUPPORTED
-    jnz     SHORT .TryToSetBlockMode
-    stc
-    mov     ah, RET_HD_INVALID
-    jmp     Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
-
-ALIGN JUMP_ALIGN
-.TryToSetBlockMode:
 %ifndef USE_186
     call    AH24h_SetBlockSize
@@ -51 +42 @@
 ;       AL, BX, CX, DX
 ;--------------------------------------------------------------------
-;ALIGN JUMP_ALIGN
 AH24h_SetBlockSize:
     push    ax
     xchg    dx, ax          ; DL = Block size (Sector Count Register)
+    or      BYTE [di+DPT.bFlagsHigh], FLGH_DPT_BLOCK_MODE_SUPPORTED ; Assume success
     mov     al, COMMAND_SET_MULTIPLE_MODE
     mov     bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY)
@@ -61 +52 @@
     jnc     .StoreBlockSize
     mov     bl, 1   ; Disable block mode
+    and     BYTE [di+DPT.bFlagsHigh], ~FLGH_DPT_BLOCK_MODE_SUPPORTED
 .StoreBlockSize:    ; Store new block size to DPT and return
     mov     [di+DPT_ATA.bSetBlock], bl