kernel vga parameters

Table 1: Listing of Video Modes and codes

 Colours   640x400 640x480 800x600 1024x768 1152x864 1280x1024 1600x1200
-------+--------------------------------------------------------------
4 bits |    ?       ?     0x302      ?        ?        ?         ?
8 bits |  0x300   0x301   0x303    0x305    0x161    0x307     0x31C
15 bits |    ?     0x310   0x313    0x316    0x162    0x319     0x31D
16 bits |    ?     0x311   0x314    0x317    0x163    0x31A     0x31E
decimal |           d785    d788     d791
24 bits |    ?     0x312   0x315    0x318      ?      0x31B     0x31F
decimal |           d786    d789     d792
32 bits |    ?       ?       ?        ?      0x164      ?

Here is a better explanation of VESA framebuffer (from Documentation/fb/vesafb.txt):

Table 2: listing of VESA mode numbers

     | 640x480  800x600  1024x768 1280x1024
----+-------------------------------------
256 |  0x101    0x103    0x105    0x107
32k |  0x110    0x113    0x116    0x119
64k |  0x111    0x114    0x117    0x11A
16M |  0x112    0x115    0x118    0x11B

The video mode number of the Linux kernel is the VESA mode number plus 0x200. So the table for the Kernel mode numbers are:

Table 3: Kernel VESA mode codes

     | 640x480  800x600  1024x768 1280x1024
----+-------------------------------------
256 |  0x301    0x303    0x305    0x307
32k |  0x310    0x313    0x316    0x319
64k |  0x311    0x314    0x317    0x31A
16M |  0x312    0x315    0x318    0x31B