Changeset 65 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS_Configurator_v2/Src/Buffers.asm

Timestamp:

Dec 5, 2010, 6:52:11 PM (13 years ago)

Author:

aitotat

google:author:

aitotat

Message:

Changes to XTIDE Universal BIOS Configurator v2:

• All necessary features should now be implemented.

File:

• trunk/XTIDE_Universal_BIOS_Configurator_v2/Src/Buffers.asm (modified) (9 diffs)

trunk/XTIDE_Universal_BIOS_Configurator_v2/Src/Buffers.asm

@@ -2 +2 @@
 ; Project name  :   XTIDE Universal BIOS Configurator v2
 ; Created date  :   6.10.2010
-; Last update   :   19.11.2010
+; Last update   :   5.12.2010
 ; Author        :   Tomi Tilli
 ; Description   :   Functions for accessing file and flash buffers.
@@ -41 +41 @@
 
     call    Buffers_GetFileBufferToESDI
-    jmp     SHORT Buffers_IsXtideUniversalBiosSignatureInESDI
+    call    Buffers_IsXtideUniversalBiosSignatureInESDI
+    jnz     SHORT .NoFileOrBiosLoaded
+    jmp     SHORT .IsSupportedVersionOfXtideUniversalBiosLoaded
 .NoFileOrBiosLoaded:
     or      cl, 1       ; Clear ZF
     ret
 
+
+ALIGN JUMP_ALIGN
+.IsSupportedVersionOfXtideUniversalBiosLoaded:
+    
 
 ;--------------------------------------------------------------------
@@ -79 +85 @@
 ;       Nothing
 ;   Corrupts registers:
-;       AX, BX, CX, DX
+;       AX, CX
 ;--------------------------------------------------------------------
 ALIGN JUMP_ALIGN
@@ -85 +91 @@
     and     WORD [cs:g_cfgVars+CFGVARS.wFlags], ~(FLG_CFGVARS_FILELOADED | FLG_CFGVARS_ROMLOADED | FLG_CFGVARS_UNSAVED)
     or      WORD [cs:g_cfgVars+CFGVARS.wFlags], ax
-    ; Fall to .AdjustBiosImageSizeToSupportedEepromSize
-
-;--------------------------------------------------------------------
-; .AdjustBiosImageSizeInCXtoSupportedEepromSize
-;   Parameters:
-;       CX:     Size of loaded BIOS image
-;   Returns:
-;       CX:     Size of BIOS image (and EEPROM required)
-;   Corrupts registers:
-;       AX, BX, DX
-;--------------------------------------------------------------------
-.AdjustBiosImageSizeInCXtoSupportedEepromSize:
-    mov     bx, .rgwSupportedEepromSizes
-    mov     dx, NUMBER_OF_SUPPORTED_EEPROM_SIZES-1
-ALIGN JUMP_ALIGN
-.CheckNextEepromSize:
-    cmp     cx, [cs:bx]
-    je      SHORT .StoreImageSizeFromCX
-    jb      SHORT .AppendZeroesToTheEndOfBuffer
-    inc     bx
-    inc     bx
-    dec     dx
-    jnz     SHORT .CheckNextEepromSize
-    xor     cx, cx
-    jmp     SHORT .StoreImageSizeFromCX ; 0 = 65536
-ALIGN WORD_ALIGN
-.rgwSupportedEepromSizes:
-    dw      4<<10
-    dw      8<<10
-    dw      16<<10
-    dw      32<<10
-
-;--------------------------------------------------------------------
-; .AppendZeroesToTheEndOfBuffer
-;   Parameters:
-;       CX:     Size of loaded BIOS image
-;       CS:BX:  Ptr to EEPROM size
-;   Returns:
-;       CX:     EEPROM size
-;   Corrupts registers:
-;       AX
-;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
-.AppendZeroesToTheEndOfBuffer:
-    push    es
-    push    di
-
-    call    Buffers_GetFileBufferToESDI
-    mov     ax, [cs:bx]
-    sub     ax, cx          ; AX = zeroes to append
-    xchg    ax, cx          ; AX = BIOS image size, CX = zeroes to append
-    add     di, ax
-    call    Memory_ZeroESDIwithSizeInCX
-    mov     cx, [cs:bx]
-
-    pop     di
-    pop     es
-    ; Fall to .StoreImageSizeFromCX
-
-;--------------------------------------------------------------------
-; .StoreImageSizeFromCX
-;   Parameters:
-;       CX:     Size of BIOS image (and EEPROM required)
-;   Returns:
-;       Nothing
-;   Corrupts registers:
-;       Nothing
-;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
-.StoreImageSizeFromCX:
-    mov     [cs:g_cfgVars+CFGVARS.wImageSize], cx
+    mov     ax, (64<<10) / 2    ; 32768 WORDs
+    shr     cx, 1               ; Bytes to WORDs
+    eCMOVZ  cx, ax
+    mov     [cs:g_cfgVars+CFGVARS.wImageSizeInWords], cx
     ret
 
@@ -204 +143 @@
 
 ;--------------------------------------------------------------------
+; Buffers_AppendZeroesIfNeeded
+;   Parameters:
+;       Nothing
+;   Returns:
+;       Nothing
+;   Corrupts registers:
+;       AX, CX, DI
+;--------------------------------------------------------------------
+ALIGN JUMP_ALIGN
+Buffers_AppendZeroesIfNeeded:
+    push    es
+
+    eMOVZX  di, BYTE [cs:g_cfgVars+CFGVARS.bEepromType]
+    mov     cx, [cs:di+g_rgwEepromTypeToSizeInWords]
+    sub     cx, [cs:g_cfgVars+CFGVARS.wImageSizeInWords]    ; CX = WORDs to append
+    jle     SHORT .NoNeedToAppendZeroes
+
+    call    Buffers_GetFileBufferToESDI
+    mov     ax, [cs:g_cfgVars+CFGVARS.wImageSizeInWords]
+    shl     ax, 1
+    add     di, ax          ; ES:DI now point first unused image byte
+    xor     ax, ax
+    cld
+    rep stosw
+ALIGN JUMP_ALIGN
+.NoNeedToAppendZeroes:
+    pop     es
+    ret
+
+
+;--------------------------------------------------------------------
 ; Buffers_GenerateChecksum
 ;   Parameters:
@@ -217 +187 @@
 
     call    Buffers_GetFileBufferToESDI
-    mov     cx, [cs:g_cfgVars+CFGVARS.wImageSize]
+    mov     cx, [cs:g_cfgVars+CFGVARS.wImageSizeInWords]
+    shl     cx, 1           ; Words to bytes
     dec     cx              ; Leave space for checksum byte
     xor     ax, ax
@@ -268 +239 @@
 ;--------------------------------------------------------------------
 ; Buffers_GetFileBufferToESDI
+; Buffers_GetFlashComparisonBufferToESDI
 ; Buffers_GetFileDialogItemBufferToESDI
 ;   Parameters:
@@ -277 +249 @@
 ;--------------------------------------------------------------------
 ALIGN JUMP_ALIGN
+Buffers_GetFlashComparisonBufferToESDI:
 Buffers_GetFileDialogItemBufferToESDI:
     call    Buffers_GetFileBufferToESDI
@@ -285 +258 @@
     pop     di
     ret
+ALIGN JUMP_ALIGN
 Buffers_GetFileBufferToESDI:
     mov     di, cs