I've just downloaded the new plan9 and tried my first installation, but
no luck.  I have no experience of plan9 and no clue why that error
happend.  Maybe someone who has more experience can help me out.

1. The custom plan9.ini got download had a entry `monitor=xvga' (I'd
   chose general tube capable at 1024x768), which caused `aux/vga' to
   complain something like `aux/vga: main: xvga@... not in /lib/vgadb'.
   I wonder how this inconsistancy happened.

2. After I modified the plan9.ini on boot disk, `aux/vga' complained
   `<linear 0x800000 0x1000000> not enough free address space'.

Below is my configuration: