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1========================================2arkfb - fbdev driver for ARK Logic chips3========================================4 5 6Supported Hardware7==================8 9 ARK 2000PV chip10 ICS 5342 ramdac11 12 - only BIOS initialized VGA devices supported13 - probably not working on big endian14 15 16Supported Features17==================18 19 * 4 bpp pseudocolor modes (with 18bit palette, two variants)20 * 8 bpp pseudocolor mode (with 18bit palette)21 * 16 bpp truecolor modes (RGB 555 and RGB 565)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 available in text mode)26 * panning in both directions27 * suspend/resume support28 29Text mode is supported even in higher resolutions, but there is limitation to30lower pixclocks (i got maximum about 70 MHz, it is dependent on specific31hardware). This limitation is not enforced by driver. Text mode supports 8bit32wide fonts only (hardware limitation) and 16bit tall fonts (driver33limitation). Unfortunately character attributes (like color) in text mode are34broken for unknown reason, so its usefulness is limited.35 36There are two 4 bpp modes. First mode (selected if nonstd == 0) is mode with37packed pixels, high nibble first. Second mode (selected if nonstd == 1) is mode38with interleaved planes (1 byte interleave), MSB first. Both modes support398bit wide fonts only (driver limitation).40 41Suspend/resume works on systems that initialize video card during resume and42if device is active (for example used by fbcon).43 44 45Missing Features46================47(alias TODO list)48 49 * secondary (not initialized by BIOS) device support50 * big endian support51 * DPMS support52 * MMIO support53 * interlaced mode variant54 * support for fontwidths != 8 in 4 bpp modes55 * support for fontheight != 16 in text mode56 * hardware cursor57 * vsync synchronization58 * feature connector support59 * acceleration support (8514-like 2D)60 61 62Known bugs63==========64 65 * character attributes (and cursor) in text mode are broken66 67--68Ondrej Zajicek <santiago@crfreenet.org>69