Changeset 190 in xtideuniversalbios

Timestamp:

Nov 16, 2011, 7:36:34 AM (13 years ago)

Author:

gregli@…

google:author:

gregli@hotmail.com

Message:

More comments for changes to BootMenuEvent and BootMenuPrint.

Location:

trunk/XTIDE_Universal_BIOS/Src/Boot

Files:

• BootMenuEvent.asm (modified) (3 diffs)
• BootMenuPrint.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Boot/BootMenuEvent.asm

@@ -153 +153 @@
 ALIGN JUMP_ALIGN
 .RefreshItemFromCX:
-    mov     bl,00h
-    SKIP2B  dx      ; dx corrupted below by BootMenu_GetDriveToDXforMenuitemInCX
+    mov     bl,00h      ; will result in SF being clear in .RefreshItemOrInformation...
+    SKIP2B  dx          ; dx corrupted below by BootMenu_GetDriveToDXforMenuitemInCX
     ; Fall to .RefreshInformation
         
@@ -160 +160 @@
 ;   CX:         Index of highlighted item
 ;   Cursor has been positioned to the beginning of first line
+; NO ALIGN - in the shadow of SKIP2B
 .RefreshInformation:
-    mov     bl,040h
+    mov     bl,040h     ;  will result in SF being set in .RefreshItemOrInformation...
     ; Fall to .RefreshItemOrInformationWithJumpTableInCSBX
 
@@ -178 +179 @@
     call    RamVars_GetSegmentToDS
     call    BootMenu_GetDriveToDXforMenuitemInCX
-    or      bl,dl
-    shl     bl,1
+    or      bl,dl               ;  or drive number with bit from .RefreshItemFromCX or .RefreshInformation
+    shl     bl,1                ;  drive letter high order bit to CF, Item/Information bit to SF
     jc      SHORT BootMenuPrint_HardDiskMenuitem
         

trunk/XTIDE_Universal_BIOS/Src/Boot/BootMenuPrint.asm

@@ -14 +14 @@
 ;   Parameters:
 ;       DL:     Untranslated Floppy Drive number
+;       SF:     set for Information, clear for Item
 ;   Returns:
 ;       Nothing
@@ -115 +116 @@
 ;       DL:     Untranslated Hard Disk number
 ;       DS:     RAMVARS segment
+;       SF:     set for Information, clear for Item     
 ;   Returns:
 ;       CF:     Set since menu event handled