load/eject CD tray functions check that input device is CD/DVD

git-svn-id: svn://kolibrios.org@590 a494cfbc-eb01-0410-851d-a64ba20cac60
2007-07-26 15:57:15 +00:00 · 2007-07-26 15:57:15 +00:00 · 3e7d2e5267
commit 3e7d2e5267
parent 1d9fff9e92
1 changed files with 12 additions and 0 deletions
--- a/kernel/trunk/kernel.asm
+++ b/kernel/trunk/kernel.asm
@ -4991,13 +4991,25 @@ syscall_cdaudio:                        ; CD
        and     eax, 1
        mov     [DiskNumber], eax
        call    reserve_cd_channel
+        and     ebx, 3
        inc     ebx
        mov     [cdpos], ebx
+        add     ebx, ebx
+        mov     cl, 8
+        sub     cl, bl
+        mov     al, [DRIVE_DATA+1]
+        shr     al, cl
+        test    al, 2
+        jz      .err
        ret
 .free:
        call    free_cd_channel
        and     [cd_status], 0
        ret
+.err:
+        call    .free
+        pop     eax
+        ret

 align 4