KTK-VK@finou.oulu.fi (Vesa Komulainen) (05/13/91)
Video Seven's VGA1024i card has 512K of memory so I think it should be capable of displaying 256 colours at 800x600. However, I have not seen such a driver for Windows 3. Anyone knowing better, please let me know.
pl@hsv3.UUCP (Phil Lei) (05/21/91)
In article <91133.005236KTK-VK@finou.oulu.fi> KTK-VK@finou.oulu.fi (Vesa Komulainen) writes: >Video Seven's VGA1024i card has 512K of memory so I think it should be >capable of displaying 256 colours at 800x600. However, I have not seen >such a driver for Windows 3. Anyone knowing better, please let me know. In reply to this question, the 1024i is not shipped with DRAMS that are fast enough to keep up with pixel rates required for 800x600x256. Even if it were, there are some VERY nasty problems with supporting such a mode under Windows 3.0 specifically that 64k does not divide evenly by 800. This forces page boundaries to fall in the middle of a scan line. If you are doing 640x480x256, this is not a problem because you can set the logical line length to 1024 making the page boundaries line up at the end of every 64th scanline. If you were to do such a scheme with 800x600x256, you would need 600 * 1024 = 600K of video RAM plus at least 256 bytes for the hardware sprite (mouse pointer). The Video Seven VRAM II has the option of 1 MB of video RAM and will support 800x600x256 as well as 1024x768x256 with higher Winbench performance on average than any other VGA you can buy for any amount of money. Video Seven can be reached at (415) 623-7857 John Brenneise, Video Seven Software Dept.