Text mode seems to mostly work with OGD1 VGA BIOS version 0.1 tested on OGD1 hardware under Ubuntu 10.10, with a few caveats --
VT100 frames (and others) don't seem to work (e.g., try aptitude on Debian-like systems, links, or anything else that uses them). Setting text modes other than 80x25 sometimes works, but some modes have apparently overstruck characters (i.e., produce obviously broken output), while others appear at a size other than reported by GRUB. To enter other text modes, I used the 'linux16' and 'init16' commands with GRUB2, enabling use of the kernel option 'vga=ask', which supplies a list containing something similar to this: 0 F00 80x25 1 F01 80x50 2 F02 80x43 3 F03 80x28 4 F05 80x30 5 F06 80x34 6 F07 80x60 80x25 and 80x30 produce nominal results, with 80x30 offering a larger console size. 80x50 appears to produce an 80x25 character grid, with larger characters overstruck with characters of a smaller size. 80x43 and 80x60 produce a similar overstruck output, on 80x21 and 80x30 grids, respectively. 80x28 produces an 80x24 mode with no obvious overstrike; 80x34 produces an 80x29 mode with no obvious overstrike. In sum, the largest currently configurable grid via vga=ask appears to be 80x30; other sizes that seem to work with reasonably rendered characters are 80x25 (default), 80x24 (by selecting 80x28), and 80x29 (by selecting 80x34). _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
