Changeset 69

Timestamp:

Apr 8, 2017, 12:25:54 AM (8 years ago)

Author:

Ben Rietbroek

Message:

Get rid of the non-ASCII characters [v1.1.1-testing]

These characters use CP437 encoding, which causes problems when the
source is loaded into editors not supporting this encoding. This goes
especially for the '0adh' character which is part of the AiR-BOOT
configuration signature.

CAUTION:
This is a testbuild !
AirBoot uses the BIOS to access disks and a small coding error can trash
partition tables or other vital disk structures. You are advised to make
backups of TRACK0 and EBRs before using this testbuild. More info at:
​https://rousseaux.github.io/netlabs.air-boot/pdf/AirBoot-v1.1.0-manual.pdf

File:

• trunk/bootcode/airboot.asm (modified) (2 diffs)

trunk/bootcode/airboot.asm

@@ -164 +164 @@
 
 ; Special line-drawing characters
-TextChar_WinLineRight       equ     0C4h ; 'Ä'
-TextChar_WinLineDown        equ     0B3h ; '³'
-TextChar_WinRep1            equ     0D1h ; 'Ñ'
-TextChar_WinRep2            equ     0C5h ; 'Å'
-TextChar_WinRep3            equ     0CFh ; 'Ï'
-TextChar_WinRep4            equ     0B5h ; 'µ'
-TextChar_WinRep5            equ     0C6h ; 'Æ'
-TextChar_WinRep6            equ     0D8h ; 'Ø'
+TextChar_WinLineRight       equ     0C4h
+TextChar_WinLineDown        equ     0B3h
+TextChar_WinRep1            equ     0D1h
+TextChar_WinRep2            equ     0C5h
+TextChar_WinRep3            equ     0CFh
+TextChar_WinRep4            equ     0B5h
+TextChar_WinRep5            equ     0C6h
+TextChar_WinRep6            equ     0D8h
 
 
@@ -1783 +1783 @@
 
 Configuration:
-                ; THERE IS A NON-ASCII CHAR HERE !!
-                ; Your editor may not display this non-ASCII
-                ; character at the end if the 'AiRCFG-TABLE'
-                ; string. When this character get's deleted,
-                ; AiR-BOOT will not function because it cannot
-                ; find the config-signature which includes this
-                ; invisible character. The code of the char is: 0adh.
-                db  'AiRCFG-TABLE­'
+                ; This is the signature for the AiR-BOOT Configuration.
+                ; Note that this configuration section, like the code section,
+                ; is CRC protected. This means that poking values in these
+                ; sections on the disk will invalidate AiR-BOOT and cause it
+                ; to halt. This is a protection method against other software
+                ; modifying stuff in track 0.
+                db  'AiRCFG-TABLE',0adh
                 db  01h, 10h, 'U' ; "Compressed" ID String
                 ; Version 1.02 was for code 1.06, 1.03 was internal