-------------------------------------- Gray Scale Management for VGA Displays -------------------------------------- Toshiba has provided two utilities, VCHAD and DSGSM, to help you control the way your computer converts colors into levels of gray on your flat panel screen. VCHAD: There may arise situations when two adjacent colored regions on your screen are displayed at the same or similar gray levels. This will make it difficult or impossible to distinguish the two regions. For example, suppose an application displays text on your screen such that the color of the text and the color of the text background map to the same gray level. This will cause the text to blend in with the background color. VCHAD is used to adjust the way colors are converted into levels of gray. Please refer to your computer's reference manual for more information on how to use this program. If you plan to use a mouse driver and VCHAD together on your system, you must load the mouse driver before you load VCHAD. If you are loading your mouse driver (e.g., MOUSE.SYS) via CONFIG.SYS, then there is no problem. If you are loading your mouse driver (e.g., MOUSE.COM) and VCHAD.EXE via AUTOEXEC.BAT or the command line, then make sure MOUSE.COM is executed before the VCHAD.EXE. VCHAD consumes about 38,000 bytes of memory when loaded as a Terminate and Stay Resident program (TSR). If you are running on a 386SX, 386 or 486 machine you can use a 386 Expanded Memory Manager such as EMM386 to place TSRs such as VCHAD into an Upper Memory Block. This will provide more memory to run your application programs. Please refer to your MS-DOS User's Manual for more information on how to use EMM386 to load VCHAD and other TSRs into this memory area. Note that VCHAD does not necessarily have to be run as a TSR. Please refer to your computer's reference manual for more information on the operation of VCHAD. DSGSM: DSGSM is the DOS Shell Gray Scale Manager utility. This utility is a Terminate and Stay Resident (TSR) program intended for use with the Task Swapping function of the MS-DOS Shell (DOSSHELL). The DOSSHELL allows the user to do task swapping between several active applications. DSGSM will preserve the individual color-to-gray level mappings for each active application. You will need DSGSM only if you use the DOS Shell Task Swapper and you use VCHAD to change the color-to-gray level mappings. You must invoke DSGSM before starting the DOSSHELL. This is done by entering the following command: DSGSM An installation message will appear on your screen to indicate that DSGSM is now loaded. DSGSM consumes about 4,000 bytes of memory when loaded as a TSR. If you are running on a 386SX, 386 or 486 machine you can use a 386 Expanded Memory Manager such as EMM386 to place TSRs such as DSGSM into an Upper Memory Block. This will provide more memory to run your application programs. Please refer to your MS-DOS User's Manual for more information on how to use EMM386 to load DSGSM and other TSRs into this memory area.Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.