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| author | Andreas Baumann <mail@andreasbaumann.cc> | 2017-05-11 22:10:07 +0200 |
|---|---|---|
| committer | Andreas Baumann <mail@andreasbaumann.cc> | 2017-05-11 22:10:07 +0200 |
| commit | 30596991abc9e452fbad8372f1ddcce12b87ce72 (patch) | |
| tree | 0268ad64556032ce19cddd43d3629e2bc1ea61db /src/stage1_functions.asm | |
| parent | 356f485c9cb5f5aa94e39ad25e9e0345682db722 (diff) | |
| download | abaos-30596991abc9e452fbad8372f1ddcce12b87ce72.tar.gz abaos-30596991abc9e452fbad8372f1ddcce12b87ce72.tar.bz2 | |
better documentation for the boot loading process and how much
sectors each part needs, fixed truncation problem
started a magic signature at the end of the image and started
to check it in stage 2 of the boot loader to avoid truncated images
in the future
Diffstat (limited to 'src/stage1_functions.asm')
| -rw-r--r-- | src/stage1_functions.asm | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/src/stage1_functions.asm b/src/stage1_functions.asm index b32d23d..c43da4d 100644 --- a/src/stage1_functions.asm +++ b/src/stage1_functions.asm @@ -1,9 +1,8 @@ ; number of sectors to be read -; this is 512 (the bootloader stage1) + ; 3 * 512 for bootloader stage2 and the kernel code ; (note: the first sector gets loaded by the BIOS, so ; subtract 1 here!) -NOF_LOAD_SECTORS equ 7 +NOF_LOAD_SECTORS equ 11 ; IN bx: begin of memory area to dump ; IN ax: number of words to dump @@ -19,7 +18,7 @@ dump_range: jnz dump_range ret -; IN bx: hex value to print +; IN dx: hex value to print print_hex: push bx push si |