Changeset 97 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs

Timestamp:

Jan 30, 2011, 6:43:08 PM (14 years ago)

Author:

Tomi Tilli

google:author:

aitotat

Message:

Changes to XTIDE Universal BIOS:

• Inlined some initialization functions.
• Removed alignment bytes from some initialization functions.
• Removed creation of compatible DPTs.

Location:

trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs

Files:

• CompatibleDPT.asm (deleted)
• RamVars.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs/RamVars.asm

@@ -13 +13 @@
 ;       Nothing
 ;   Returns:
-;       Nothing
-;   Corrupts registers:
-;       AX, CX, DI, DS
-;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
+;       DS:     RAMVARS segment
+;   Corrupts registers:
+;       AX, CX, DI
+;--------------------------------------------------------------------
 RamVars_Initialize:
     push    es
-    call    .StealMemoryForRAMVARS  ; Get RAMVARS segment to DS even if no stealing
-    call    .ClearRamvarsFromDS
-    pop     es
-    jmp     DriveXlate_Reset
+    ; Fall to .StealMemoryForRAMVARS
 
 ;--------------------------------------------------------------------
@@ -34 +30 @@
 ;       AX
 ;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
 .StealMemoryForRAMVARS:
     test    BYTE [cs:ROMVARS.wFlags], FLG_ROMVARS_FULLMODE
-    jz      SHORT RamVars_GetSegmentToDS
-
-    LOAD_BDA_SEGMENT_TO ds, ax      ; Zero AX
+    jz      SHORT .InitializeRamvars    ; No need to steal RAM
+
+    LOAD_BDA_SEGMENT_TO ds, ax          ; Zero AX
     mov     al, [cs:ROMVARS.bStealSize]
     sub     [BDA.wBaseMem], ax
     mov     ax, [BDA.wBaseMem]
-    eSHL_IM ax, 6                   ; Segment to first stolen kB (*=40h)
+    eSHL_IM ax, 6                       ; Segment to first stolen kB (*=40h)
     mov     ds, ax
-    ret
-
-;--------------------------------------------------------------------
-; .ClearRamvarsFromDS
-;   Parameters:
-;       DS:     RAMVARS segment
-;   Returns:
-;       Nothing
+    mov     WORD [FULLRAMVARS.wSign], W_SIGN_FULLRAMVARS
+    ; Fall to .InitializeRamvarsFromDS
+
+;--------------------------------------------------------------------
+; .InitializeRamvars
+;   Parameters:
+;       Nothing
+;   Returns:
+;       DS:     RAMVARS segment
 ;   Corrupts registers:
 ;       AX, CX, DI, ES
 ;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
-.ClearRamvarsFromDS:
-    call    FindDPT_PointToFirstDPT ; Get RAMVARS/FULLRAMVARS size to DI
-    mov     cx, di                  ; Copy byte count to CX
+.InitializeRamvars:
+    call    RamVars_GetSegmentToDS
+    mov     cx, RAMVARS_size
+    xor     di, di
     push    ds
     pop     es
-    xor     di, di                  ; ES:DI now points to RAMVARS/FULLRAMVARS
-    xor     ax, ax                  ; Store zeroes
-    rep stosb
-    mov     WORD [FULLRAMVARS.wSign], W_SIGN_FULLRAMVARS
-    ret
+    call    Memory_ZeroESDIwithSizeInCX
+    ; Fall to .InitializeDriveTranslationAndReturn
+
+;--------------------------------------------------------------------
+; .InitializeDriveTranslationAndReturn
+;   Parameters:
+;       DS:     RAMVARS segment
+;   Returns:
+;       Nothing
+;   Corrupts registers:
+;       AX
+;--------------------------------------------------------------------
+.InitializeDriveTranslationAndReturn:
+    pop     es
+    jmp     DriveXlate_Reset