Changeset 42 for trunk/BOOTCODE/AIR-BOOT.ASM

Timestamp:

Apr 11, 2014, 10:42:11 PM (11 years ago)

Author:

Ben Rietbroek

Message:

JWasm version working [2012-02-16]

WARNING!!

All commits upto and including the commit of [2012-05-13] contain
a severe bug!! Building from these sources and then disabling
the 'force LBA' feature while also using the drive-letter feature or
editing the label can DESTROY THE MBR on ALL ATTACHED DISKS!!
DO NOT DISABLE 'FORCE LBA USAGE' WHEN BUILT FROM THE THESE COMMITS!!

Info

o DOS linkage calculates correct offsets
o RAW linkage calculates relative offsets (no fixups)

Problem

o Something goes wrong between the end of the image and the BSS.

Moving the BSS just after the image gives corruption.
(all floppy entries, FFH)
So, the start of the BSS gets overwrittenby something...

File:

• trunk/BOOTCODE/AIR-BOOT.ASM (modified) (3 diffs)

trunk/BOOTCODE/AIR-BOOT.ASM

@@ -580 +580 @@
 ; time.
 ;
-;SEGMENTED   EQU 1
+SEGMENTED   EQU 1
 
 IFDEF   SEGMENTED
@@ -638 +638 @@
 
                 ; ID String, Date (DD,MM,CC,YY), Version Number, Language ID
-                db      'AiRBOOT', 15h, 02h, 20h, 12h, 01h, 08h, TXT_LanguageID
+                db      'AiRBOOT', 16h, 02h, 20h, 12h, 01h, 08h, TXT_LanguageID
 
                 ; Total Sectors Count.
@@ -1996 +1996 @@
                             ; with segment-concatenated layout.
                             ;
-                            org 0A000h                         ; Uninitialized
+                            ; What happens before this space ??
+                            ; If org 0 corruption occurs.
+                            ;
+                            org 02400h                         ; Uninitialized