diff options
| author | Michal Idziorek <m.i@gmx.at> | 2014-09-05 02:36:33 +0200 |
|---|---|---|
| committer | Michal Idziorek <m.i@gmx.at> | 2014-09-05 02:36:33 +0200 |
| commit | b75c10c9d8c7405ba2f89724b485154d5201c404 (patch) | |
| tree | 6ce30784f4d7bbb5ca2a5cb636da7fa2186bee57 /boot0/disk_load_16.asm | |
| parent | 467e19b262d435f1820539bc0c85ed4fa31b9687 (diff) | |
working on bootloaders (lba)
Diffstat (limited to 'boot0/disk_load_16.asm')
| -rw-r--r-- | boot0/disk_load_16.asm | 44 |
1 files changed, 36 insertions, 8 deletions
diff --git a/boot0/disk_load_16.asm b/boot0/disk_load_16.asm index 55ad4aa..6762469 100644 --- a/boot0/disk_load_16.asm +++ b/boot0/disk_load_16.asm @@ -9,15 +9,15 @@ [bits 16] STR_LBA: - db "\nLBA Support Detected (no support yet)",0 + db "LBA Support Detected",0 -STR_CHS +STR_CHS: db "CHS Support Detected",0 -STR_ERROR +STR_ERROR: db "Disk Read Error",0 -STR_DONE +STR_DONE: db "Stage 2 Loaded",0 disk_load_16: @@ -31,14 +31,23 @@ disk_load_16: jnc disk_load_lba jmp disk_load_chs - disk_load_lba: mov bx, STR_LBA call print_string call print_nextline - jmp $ - jmp disk_load_finish + + mov dl,[BOOT_DRIVE] + xor ah,ah + mov ah,0x42 + + mov bx,0 + mov ds,bx + lea si,[lba_adr] + + int 0x13 + jnc disk_load_finish + jmp disk_load_error disk_load_chs: @@ -63,6 +72,12 @@ disk_load_chs: jnc disk_load_finish +disk_load_error: + + call print_nextline + mov bx, STR_ERROR + call print_string + call print_nextline jmp $ disk_load_finish: @@ -75,4 +90,17 @@ disk_load_finish: popa ret - + + +;; here we hold the lba addr +lba_adr: + + dw 0x10 ; size of packet ( 16 byte) + dw 16 ; number of sectors to read + + ; target is 0x7e00 + dw 0x7e00 ; target addr. offset + dw 0x0000 ; target addr. sector + + dd 1 ; first sector to read + dd 0 |