Changeset 38 for trunk/BOOTCODE/SPECIAL/LINUX.ASM

Timestamp:

Apr 11, 2014, 9:36:56 PM (11 years ago)

Author:

Ben Rietbroek

Message:

Converting to JWasm -- phase #1 (not working) [2012-02-15]

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!!

Problems

o WLink generates an oversized image
o Only Tasm with TLink works correctly

File:

• trunk/BOOTCODE/SPECIAL/LINUX.ASM (modified) (5 diffs)

trunk/BOOTCODE/SPECIAL/LINUX.ASM

@@ -188 +188 @@
    add     di, LocIPT_Name
   LSKN_SearchLoop:
-      push    cx
-      push    si
-      push    di
+      push    cx si di
          mov     cx, 11
          repe    cmpsb                   ; Compare total 11-bytes
-      pop     di
-      pop     si
-      pop     cx
+      pop     di si cx
       je      LSKN_Found
       add     di, LocIPT_LenOfIPT
@@ -228 +224 @@
    ; Linux has 1 'BR' (which is crap) and some setup sectors
    ; we load them at 9000:0, what a luck, we are at 8000:0 :-))
-   push    ds
-   push    es
+   push    ds es
       mov     ax, 9000h
       mov     es, ax
@@ -260 +255 @@
       mov     ax, 6000h
       mov     es, ax
-      ; Push Kernel-Entry-Pointer
-      push    cx
-      push    si
+      push    cx si                      ; Push Kernel-Entry-Pointer
          mov     si, di
          shl     cx, 9                   ; Sectors to Byte Count
@@ -269 +262 @@
          shr     cx, 1
          rep     movsw                   ; Copy Data...
-      ; Get Kernel-Entry-Pointer back
-      pop     si
-      pop     cx
+      pop     si cx                      ; Get Kernel-Entry-Pointer back
      LLL_GotAll:
-   pop     es
-   pop     ds
-
-   ; Push Missing-Sectors, StartCluster
-   push    cx
-   push    dx
+   pop     es ds
+
+   push    cx dx                          ; Push Missing-Sectors, StartCluster
       mov     ax, 9000h
       mov     ds, ax
@@ -348 +336 @@
          stosb                            ; Write another NUL
       pop     cx
-   ; Pop StartCluster, Missing-Sectors
-   pop     dx
-   pop     bx
+   pop     dx bx                          ; Pop StartCluster, Missing-Sectors
    ; CX - Sector-Count of Kernel Image, DX - Starting Cluster of Kernel Image
    ; BX - Sector-Count left over in 6000:0 area from Setup Code loading