4820SX/T (250-5140) Video Faxback Doc. # 1668 The VGAMODE.EXE utility enables you to choose one of the video standards supported by the adapter. Choose from a menu or directly from the MS-DOS prompt line. To access the VGAMODE.EXE utility: 1. Turn on your computer. 2. Type: drive:\path\vgamode where drive: and path specify the drive and the directory containing VGAMODE.EXE. Then, press ENTER. 3. Use the up and down direction keys on the keyboard to select the desired video mode from the VGAMODE.EXE menu. Then, press ENTER. To exit, choose Exit to DOS and press ENTER. To bypass the menu, include the desired video option(s) when accessing VGAMODE.EXE. At the MS-DOS prompt or in a batch file, type the command in the form: drive:\path\vgamode [options] where options is one or more of the following video options. VGA--Selects VGA mode (the default configuration). CGA--Selects CGA mode (emulates the video capabilities of the IBM Color/Graphics Adapter). MDA--Emulates the Hercules Graphics Card with no graphics memory allocated (equivalent to IBM's text-only Monochrome Display Adapter). HERCO--Emulates the Hercules Graphics Card with one page of graphics memory allocated (equivalent to using the Hercules Graphics Card is HALF mode). HERC1--Emulates the Hercules Graphics Card with two pages of graphics memory allocated (equivalent to the Hercules Graphics Card in FULL mode). COLOR--Sets the video circuitry to color mapping as needed, supporting video modes that require color mapping. MONO--Sets the video circuitry to monochrome mapping as needed, supporting video modes that use monochrome mapping (such as monochrome text mode). 56--Sets the video circuitry to 800 x 600 modes for 56 Hz. 60--Sets the video circuitry to 800 x 600 modes for 60 Hz. 72--Sets the video circuitry to 800 x 600 modes for 72 Hz. 200--Sets the video circuitry to display 200 scan lines. 350--Sets the video circuitry to display 350 scan lines. 400--Sets the video circuitry to display 400 scan lines. 400256--Sets the video circuitry to 640 x 400 resolution in 256 colors. 480256--Sets the video circuitry to 800 x 600 resolution in 256 colors. 600--Sets the video circuitry to 800 x 600 resolution in 16 colors. 768--Sets the video circuitry to 1024 x 768 resolution in 16 colors. 600256--Sets the video circuitry to 800 x 600 resolution in 256 colors. 13225--Sets 132-column, 25-line color text mode; use only with application programs designed to take advantage to Super VGA text capabilities. 13243 or 13244--Switches the video circuitry to 132-column, 43 or 44-line color text mode; use only with application programs designed to take advantage to Super VGA text capabilities. INTERLACE--Sets 1024 x 768 modes as interlaced. 60NON-INTERLACE--Sets 1024 x 768 modes as non-interlaced, 60 Hz. 70NON-INTERLACE--Sets 1024 x 768 modes as non-interlaced, 70 Hz. LOCK--Locks in the current video configuration as the new default configuration. This command can be used with another parameter to lock in that particular mode. For example, vgamode cga lock will enable the video circuitry to remain configured as a color/graphics adapter even after you press [CTRL] + [ALT] + [DEL]. Any specific video mode command will unlock the previous mode of the circuitry. REBOOT--Locks and reboots the currently selected video mode so that system re-initializes in current video mode. Can also be used with any parameter to lock that particular mode. IF YOU HAVE A MOUSE Changing video modes is often simply a matter of running VGAMODE.EXE and choosing the desired setting. However, if your mouse driver is installed through the CONFIG.SYS file or if the mouse is controlled by a program such as MOUSE.COM, you might need to restart the computer after choosing a video mode. IF YOU HAVE AN EMS ADAPTER The VGA 1024 NI Adapter uses memory locations A000-C7FFF, the same memory locations as a standard EGA card plus an additional 16KB for the extended video BIOS ROM. If you have an EMS (Expanded Memory Specification)adapter, that adapter must not conflict with these meory locations. Check with the manufacturer of your EMS adapter for information about configuring it for use with a VGA-compatible video adapter. You might need to exclude locations A0000-C7FFF from use by your EMS driver. Usually, you can designate these exclusions when starting your EMS driver. TROUBLESHOOTING THE VIDEO ADAPTER Following is a list of some typical symptoms of problems you might have with the video adapter, along with possible solutions: One long beep and two short beeps when you turn on the system * The video adapter is not seated properly in the expansion slot. Reseat the adapter, being sure that it is secure. * The expansion slot connector on the video adapter is not clean. Clean the edge connectors with a clean pencil eraser. Use caution because the gold plating it thin and will not stand up to severe abrasion. To avoid leaving residue on the connectors, do not touch them with you bare hand. * If cleaning and reseating does not solve the problem, contact your computer dealer for assistance. No Display * There is a loose connection. Be sure that the adapter is firmly seated and that the monitor power cable and the monitor signal cable are securely connected. * The system is not configured correctly. Review the installation procedures to ensure that the system is configured correctly. * The monitor is not turned on. * The brightness and/or contrast controls are not adjusted correctly. Re-adjust the controls. * The jumper and/or switch settings are incorrect. Verify that all jumpers and switches are set correctly. F1 SETUP error when you start up your system * The setup utility was not run correctly. See the "Configuring Your System" section for information on running the setup utility. * The battery in the computer might be dead. Display rolls horizontally or vertically * You are using inappropriate software. Verify that you are using the correct software files for your monitor. Image is offset on monitor * You need to adjust the monitor centering. Refer to your monitor documentation. Distorted images or a blank screen when you run your software * The software is not configured for the current video configuration of the adapter. Reconfigure the software for VGA or EGA video. * The software is not compatible with the current video configuration of the adapter. Set the adapter to a video standard supported by the software. See "Operation". Inability to display 800x600 and 1024x768 graphics * The 1024x768 modes require a multi-frequency monitor. (smc/jej-05/11/94)