diff options
Diffstat (limited to 'kernel.asm')
| -rw-r--r-- | kernel.asm | 59 |
1 files changed, 36 insertions, 23 deletions
@@ -16,9 +16,9 @@ kmain: mov ax, cs ; get code segment mov ds, ax ; set data segment mov es, ax ; set extra segment - mov ax, 8000h + mov ax, 9000h mov ss, ax ; set stack segment - mov sp, 0ffffh ; set stack pointer (~64k) + mov sp, 0FBFFh ; set stack pointer (~64k) sti ; enable interrupts mov [drive0], dx ; store bootloader's drive number @@ -35,9 +35,9 @@ kmain: mov dl, 0 ; select video page 0 call console_set_video_page ; set video page - call cls ; clear console + call cls ; clear console - push 0 ; home the cursor + push 0000h ; home the cursor call setcursor add sp, 2 @@ -60,24 +60,36 @@ kmain: push cs push msg_entry_point_fmt call printf - add sp, 2 * 11 + add sp, 2 * 14 - mov cx, 0ffh - 80h - mov dx, 80h - .extloop: - push dx - call disk_info + mov dx, 0000h ; dx = diskette drive number + .info_diskette_loop: ; display diskette drive data + push dx ; load drive number (0-3) + call disk_info ; show info add sp, 2 - inc dx - dec cx - jne .extloop + inc dx ; next drive + cmp dl, 03h ; for 3 devices + jle .info_diskette_loop ; continue + + mov dx, 0080h ; dx = drive number (128+n) + .info_disk_loop: ; display hard drive data + push dx ; load drive number (80h-81h) + call disk_info ; show info + add sp, 2 + + push dx ; next drive + call disk_info_ext ; show drive extensions + add sp, 2 + + inc dx ; next drive + cmp dx, 81h ; for 2 devices + jle .info_disk_loop ; continue .mainloop: call isr_inject call terminal - jmp .mainloop cli @@ -141,18 +153,19 @@ panic: ; data -banner: db "+========================+", ASCII_CR - db "| Welcome to MINOS 0.0.1 |", ASCII_CR - db "+========================+", ASCII_CR - db ASCII_CR, 0 +banner: db "+========================+", ASCII_LF + db "| Welcome to MINOS 0.0.1 |", ASCII_LF + db "+========================+", ASCII_LF + db ASCII_LF, 0 -msg_entry_point_fmt: db 'Kernel address: %x:%x - %x:%x (%d:%d - %d:%d)', ASCII_CR - db 'Stack address : %x:%x (%d:%d)', ASCII_CR - db 'Boot device : %x', ASCII_CR, ASCII_CR, 0 -msg_isr_fmt: db "ISR %x:%x", ASCII_CR, 0 +msg_entry_point_fmt: + db 'Kernel address: %x:%x - %x:%x (%d:%d - %d:%d)', ASCII_LF + db 'Stack address : %x:%x (%d:%d)', ASCII_LF + db 'Boot device : %x', ASCII_LF, ASCII_LF, 0 +msg_isr_fmt: db "ISR %x:%x", ASCII_LF, 0 ; Error messages error_msg_panic: db "PANIC: ", 0 kend: dw 0xefbe ; The "BEEF" signature is a visual "end of kernel" -times (0200h * 20h) db 0 ; Until we have a file system just reserve 32k +times (1474560-512)-($-$$) db 0 ; Until we have a file system reserve 1.44MBs |