Changeset 150 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Inc/RamVars.inc

Timestamp:

Apr 29, 2011, 7:04:13 PM (14 years ago)

Author:

Tomi Tilli

google:author:

aitotat

Message:

Changes to XTIDE Universal BIOS:

• Redesigned Disk Parameter Tables.
• Code generalizations for supporting non-IDE devices in the future.

File:

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

trunk/XTIDE_Universal_BIOS/Inc/RamVars.inc

@@ -5 +5 @@
 
 ; Segment when RAMVARS is stored to top of interrupt vectors.
-SEGMENT_RAMVARS_TOP_OF_INTERRUPT_VECTORS        EQU     30h
+LITE_MODE_RAMVARS_SEGMENT   EQU     30h
 
 
@@ -21 +21 @@
 struc RAMVARS
     .fpOldI13h          resb    4   ; Far pointer to old INT 13h handler
-    .wIdeBase           resb    2   ; Base port address for currently handled controller
     .wTimeoutCounter    resb    2
+    .pInServiceDPT      resb    2   ; Ptr to DPT for drive waiting for interrupt
+    .wSignature         resb    2   ; Sign for finding stolen 1 kiB
 
     .wDrvCntAndFirst:
@@ -32 +33 @@
 endstruc
 
-; Full mode RAM variables.
-struc FULLRAMVARS
-    .ramVars            resb    RAMVARS_size
-    .wSign              resb    2       ; FULLRAMVARS signature for finding segment
+RAMVARS_SIGNATURE       EQU "Xu"    ; RAMVARS signature for .wSignature
+
+
+struc IDEPACK
+    .bDrvAndHead            resb    1   ; LBA28 27...24
+    .bFeatures              resb    1
+
+    .wSectorCountAndLbaLow:
+    .bSectorCount           resb    1
+    .bSectorNumber:
+    .bLbaLow                resb    1   ; LBA 7...0
+
+    .wCylinder:
+    .wLbaMiddleAndHigh:
+    .bLbaMiddle             resb    1   ; LBA 15...8
+    .bLbaHigh               resb    1   ; LBA 23...16
+
+    .bCommand               resb    1
+    .bDeviceControl         resb    1   ; Offset 7 shared with PIOVARS
+
+    ; Parameters for 48-bit LBA
+    .wSectorCountHighAndLbaLowExt:
+    .bSectorCountHighExt    resb    1   ; LBA48 Sector Count 15...8
+    .bLbaLowExt             resb    1   ; LBA48 31...24
+
+    .wLbaMiddleAndHighExt:
+    .bLbaMiddleExt          resb    1   ; LBA48 39...32
+    .bLbaHighExt            resb    1   ; LBA48 47...40
+
+    .intpack                resb    INTPACK_size
 endstruc
 
-W_SIGN_FULLRAMVARS      EQU "fR"        ; FULLRAMVARS signature
+EXTRA_WORDS_TO_RESERVE_FOR_INTPACK  EQU ((IDEPACK_size - INTPACK_size) / 2)