Changeset 414 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers

Timestamp:

May 3, 2012, 12:56:04 PM (13 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• MEMPIOVARS no longer overflow when not building MODULE_EBIOS.

Location:

trunk/XTIDE_Universal_BIOS/Src/Handlers

Files:

• Int13h.asm (modified) (5 diffs)
• Int19h.asm (modified) (1 diff)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm

@@ -45 +45 @@
 %ifdef MODULE_HOTKEYS
     call    DriveXlate_ToOrBack
-%endif
     mov     [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl
+%endif
 
     call    FindDPT_ForDriveNumberInDL  ; DS:DI points to our DPT, or NULL if not our drive
@@ -129 +129 @@
     mov     [bp+IDEPACK.intpack+INTPACK.si], si
     mov     [bp+IDEPACK.intpack+INTPACK.bx], bx
+%ifdef MODULE_HOTKEYS
     mov     [bp+IDEPACK.intpack+INTPACK.dh], dh
+%else
+    mov     [bp+IDEPACK.intpack+INTPACK.dx], dx
+%endif
     mov     [bp+IDEPACK.intpack+INTPACK.cx], cx
     mov     [bp+IDEPACK.intpack+INTPACK.ax], ax
@@ -135 +139 @@
     pop     WORD [bp+IDEPACK.intpack+INTPACK.flags]
     call    RamVars_GetSegmentToDS
-    cmp     dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv]
+
+%ifdef MODULE_HOTKEYS
+    cmp     dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv]    ; DL is still drive number?
     je      SHORT .ExchangeInt13hHandlers
-    mov     [bp+IDEPACK.intpack+INTPACK.dl], dl     ; Something is returned in DL
+    mov     [bp+IDEPACK.intpack+INTPACK.dl], dl ; Something is returned in DL
 ALIGN JUMP_ALIGN
 .ExchangeInt13hHandlers:
+%endif
+
 %ifdef USE_186
     push    Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
@@ -192 +200 @@
 Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH_ALHasDriveNumber:
     call    Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH_ALHasDriveNumber
+
 %else
     call    Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
 %endif
+
 Int13h_ReturnFromHandlerWithoutStoringErrorCode:
     or      WORD [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_IF   ; Return with interrupts enabled
@@ -265 +275 @@
     mov     bx, BDA.bHDLastSt
     test    al, al
-    js      .HardDisk
+    js      SHORT .HardDisk
     mov     bl, BDA.bFDRetST & 0xff
 .HardDisk:

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int19h.asm

@@ -29 +29 @@
 ;--------------------------------------------------------------------
 Int19h_BootLoaderHandler:
-    sti                                         ; Allow timer interrupts
-    LOAD_BDA_SEGMENT_TO es, ax                  ; Load BDA segment (zero) to ES
+    sti                                 ; Enable interrupts
+    cld                                 ; String instructions to increment pointers
+    LOAD_BDA_SEGMENT_TO es, ax          ; Load BDA segment (zero) to ES
     ; Fall to .PrepareBootLoaderStack