05E7:16C3 B80010            mov     ax, 1000
 05E7:16C6 CD2F              int     2F
 05E7:16C8 C3                retn

 !-u 3B64
 05E7:3B64 53                push    bx
 05E7:3B65 51                push    cx
 05E7:3B66 52                push    dx
 05E7:3B67 06                push    es
 05E7:3B68 85C0              test    ax, ax
 05E7:3B6A 7413              jz      3B7F
 05E7:3B6C 803E8C1100        cmp     byte [118C], 00
 05E7:3B71 750C              jnz     3B7F
 05E7:3B73 E84DDB            call    16C3
 05E7:3B76 3CFF              cmp     al, FF
 05E7:3B78 7505              jnz     3B7F
 05E7:3B7A C6068C1101        mov     byte [118C], 01
 05E7:3B7F A08C11            mov     al, [118C]
 05E7:3B82 98                cbw
 05E7:3B83 07                pop     es
 !-u
 05E7:3B84 E922EE            jmp     29A9
 !-u 29A9
 05E7:29A9 5A                pop     dx
 05E7:29AA 59                pop     cx
 05E7:29AB 5B                pop     bx
 05E7:29AC C3                retn