1 ========================================
2 arkfb - fbdev driver for ARK Logic chips
3 ========================================
4
5
6 Supported Hardware
7 ==================
8
9 ARK 2000PV chip
10 ICS 5342 ramdac
11
12 - only BIOS initialized VGA devices su
13 - probably not working on big endian
14
15
16 Supported Features
17 ==================
18
19 * 4 bpp pseudocolor modes (with 18bit
20 * 8 bpp pseudocolor mode (with 18bit
21 * 16 bpp truecolor modes (RGB 555 and
22 * 24 bpp truecolor mode (RGB 888)
23 * 32 bpp truecolor mode (RGB 888)
24 * text mode (activated by bpp = 0)
25 * doublescan mode variant (not availab
26 * panning in both directions
27 * suspend/resume support
28
29 Text mode is supported even in higher resoluti
30 lower pixclocks (i got maximum about 70 MHz, i
31 hardware). This limitation is not enforced by
32 wide fonts only (hardware limitation) and 16bi
33 limitation). Unfortunately character attribute
34 broken for unknown reason, so its usefulness i
35
36 There are two 4 bpp modes. First mode (selecte
37 packed pixels, high nibble first. Second mode
38 with interleaved planes (1 byte interleave), M
39 8bit wide fonts only (driver limitation).
40
41 Suspend/resume works on systems that initializ
42 if device is active (for example used by fbcon
43
44
45 Missing Features
46 ================
47 (alias TODO list)
48
49 * secondary (not initialized by BIOS)
50 * big endian support
51 * DPMS support
52 * MMIO support
53 * interlaced mode variant
54 * support for fontwidths != 8 in 4 bpp
55 * support for fontheight != 16 in text
56 * hardware cursor
57 * vsync synchronization
58 * feature connector support
59 * acceleration support (8514-like 2D)
60
61
62 Known bugs
63 ==========
64
65 * character attributes (and cursor) in
66
67 --
68 Ondrej Zajicek <santiago@crfreenet.org>
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.