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| author | Joseph Hunkeler <jhunkeler@gmail.com> | 2017-12-03 11:48:41 -0500 |
|---|---|---|
| committer | Joseph Hunkeler <jhunkeler@gmail.com> | 2017-12-03 11:48:41 -0500 |
| commit | 81f223e619ed3837253f2fad45367a33876c86e5 (patch) | |
| tree | 68337b5dd706ec75814d0ceb64a106cfd8c6d348 /kernel.asm | |
| parent | 0b726e795762abe2a909eca2300957329718ec2c (diff) | |
| download | minos-81f223e619ed3837253f2fad45367a33876c86e5.tar.gz | |
Fix stack underrun; Add disk info
Diffstat (limited to 'kernel.asm')
| -rw-r--r-- | kernel.asm | 27 |
1 files changed, 19 insertions, 8 deletions
@@ -39,6 +39,7 @@ kmain: call puts add sp, 2 + push word [drive0] push sp push ss push sp @@ -47,9 +48,19 @@ kmain: push cs push kmain push cs - push msg_test + push msg_entry_point call printf - add sp, 12 + add sp, 20 + + mov cx, 0ffh - 80h + mov dx, 80h + .extloop: + push dx + call disk_info + add sp, 2 + inc dx + dec cx + jne .extloop .mainloop: call terminal @@ -79,18 +90,18 @@ panic: ; data -msg_entry_point: db 'Loaded at ', 0 -msg_entry_point_stack: db 'Stack at ', 0 banner: db "+========================+", CR db "| Welcome to MINOS 0.0.1 |", CR db "+========================+", CR db CR, 0 -msg_test: db 'Kernel address: %x:%x (%d:%d)', CR - db 'Stack address : %x:%x (%d:%d)', CR, CR, 0 +msg_entry_point: db 'Kernel address: %x:%x (%d:%d)', CR + db 'Stack address : %x:%x (%d:%d)', CR + db 'Boot device : %x', CR, CR, 0 ; Error messages error_msg_panic: db "PANIC: ", 0 -times 512 * 20h db 0 -dw 0xefbe +times (512 * 20h) - 2 db 0 ; Until we have a file system just reserve 32k of "free space" +dw 0xefbe ; The "BEEF" signature is a visual "end of kernel" + ; It has no meaning... |