diff options
Diffstat (limited to 'src/stage2_real_functions.asm')
| -rw-r--r-- | src/stage2_real_functions.asm | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/stage2_real_functions.asm b/src/stage2_real_functions.asm index 2db8947..273d790 100644 --- a/src/stage2_real_functions.asm +++ b/src/stage2_real_functions.asm @@ -6,7 +6,8 @@ NOF_LOAD_SECTORS equ 36 ; data sections used for reading the kernel from disk SECTORS_PER_CYLINDER: - db 0x13 ; detect parameters enters the correct value here (sectors + 1) + db 0x3F ; detect parameters enters the correct value here (sectors + 1) + ; if detection fails, force int13 to read ahead NOF_HEADS: db 0x02 ; number of heads + 1 SECTORS_TO_LOAD: @@ -25,6 +26,18 @@ detect_disk_geometry: mov es, dx mov ah, 0x08 int 0x13 + jc .error + jmp .ok + +.error: + mov si, DISK_ERROR + call print_string + mov dh, 0 + mov dl, ah + call print_hex + ret + +.ok: add dh, 1 mov [NOF_HEADS], BYTE dh call print_hex |