Changeset 535 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Inc/EBIOS.inc

Timestamp:

Apr 8, 2013, 5:09:44 PM (11 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• AH=48h now returns Device Parameter Table Extension when RETURN_DPTE_ON_AH48H is defined.
• Removed few unnecessary instructions from hardware interrupt handler.
• P-Cylinders returned by AH=48h are no longer calculated from L-CHS capacity.

File:

• trunk/XTIDE_Universal_BIOS/Inc/EBIOS.inc (modified) (3 diffs)

trunk/XTIDE_Universal_BIOS/Inc/EBIOS.inc

@@ -22 +22 @@
 
 ; EBIOS specification returned by INT 13h, AH=41h
-EBIOS_VERSION                       EQU 21h     ; 21h = EDD version 1.1
+
+EDD_V1_1                            EQU 21h     ; 21h = EDD version 1.1
+EBIOS_VERSION                       EQU EDD_V1_1
 
 ; Support bits returned by INT 13h, AH=41h
@@ -39 +41 @@
     .qwTotalSectors         resb    8   ; 16, Total number of addressable sectors
     .wSectorSize            resb    2   ; 24, Number of bytes per sector
-    .fpEDDparams            resb    8   ; 26, Optional pointer to Enhanced Disk Drive (EDD) configuration parameters
+    .fpDPTE                 resb    4   ; 26, Optional pointer to Device Parameter Table Extension
 endstruc
 
 MINIMUM_EDRIVEINFO_SIZE     EQU     26  ; 26 bytes does not include EDD pointer
+EDRIVEINFO_SIZE_WITH_DPTE   EQU     EDRIVE_INFO_size
 
 ; Flags for EDRIVE_INFO.wFlags
@@ -52 +55 @@
 FLG_LOCKABLE                                        EQU (1<<5)  ; Removable media only
 FLG_NO_MEDIA_PRESENT_AND_CHS_SET_TO_MAX             EQU (1<<6)  ; Removable media only
+
+
+; Device Parameter Table Extension
+struc DPTE
+    .wBasePort              resb    2   ; 0, Command Block Base Port Address
+    .wControlBlockPort      resb    2   ; 2, Control Block Base Port Address
+    .bDrvnhead              resb    1   ; 4, Drive and Head Select Register upper nibble
+    .bBiosVendor            resb    1   ; 5, BIOS Vendor Specific
+    .bIRQ                   resb    1   ; 6, IRQ for this device
+    .bBlockSize             resb    1   ; 7, Current block size in sectors
+    .bDmaChannelAndType     resb    1   ; 8, DMA information
+    .bPioMode               resb    1   ; 9, PIO mode
+    .wFlags                 resb    2   ; 10, BIOS selected hardware specific option flags
+    .wReserved              resb    2   ; 12, Reserved. Must be zero.
+    .bRevision              resb    1   ; 14, Revision level of this table (11h)
+    .bChecksum              resb    1   ; 15, Checksum, 2's complement of the sum of bytes 0-14
+endstruc
+
+; Flags for DPTE.wFlags
+FLG_FAST_PIO_ENABLED        EQU (1<<0)  ; Set is using PIO mode 1 or above (DPTE.bPioMode is valid when set)
+FLG_DMA_ENABLED             EQU (1<<1)  ; Set if DMA enabled (DPTE.bDmaChannelAndType is valid when set)
+FLG_BLOCK_MODE_ENABLED      EQU (1<<2)  ; Set if Block Mode transfers are enabled (DPTE.bBlockSize is valid when set)
+FLG_CHS_TRANSLATION_ENABLED EQU (1<<3)  ; Set for drives with more than 1024 cylinders
+FLG_LBA_TRANSLATION_ENABLED EQU (1<<4)  ; Set when LBA addersses from DAP are passed directly to the drive
+FLG_REMOVABLE_MEDIA         EQU (1<<5)
+FLG_ATAPI_DEVICE            EQU (1<<6)
+FLG_32BIT_XFER_MODE         EQU (1<<7)  ; Set when using 32-bit data transfers
+FLG_ATAPI_USES_IRQ          EQU (1<<8)  ; ATAPI Device uses IRQ for data transfers
+; L-CHS translation type for old INT 13h (when FLG_CHS_TRANSLATION_ENABLED is set)
+MASK_CHS_TRANSLATION_TYPE   EQU (3<<TRANSLATION_TYPE_FIELD_POSITION)
+    TRANSLATION_TYPE_FIELD_POSITION EQU 9
+    BIT_SHIFT_TRANSLATION           EQU 0   ; LARGE
+    LBA_ASSISTED_TRANSLATION        EQU 1   ; Assisted LBA
+                                        ; 2 = reserved
+    VENDOR_SPECIFIC_TRANSLATION     EQU 3
+
+
+DPTE_REVISION               EQU     11h