README.TXT 01-15-1998 for TOSH2000.COM online distribution ============================================================================= This electronic archive contains the following files: TOSH2000.COM Program to assure correct year 2000 date rollover on older Toshiba computers INSTALL.EXE Small program to modify your AUTOEXEC.BAT file to load TOSH2000 at system startup README.TXT This file README.COM Self-displaying version of README.TXT ============================================================================= INFORMATION TOSH2000.COM is a very small DOS TSR (Terminate and Stay Resident) program that will assure correct year 2000 date rollover on older Toshiba computers. When resident, it monitors the change of century in the real time clock, and corrects it if it changes incorrectly, which can happen on the older Toshiba computers including (but not limited to) those listed below. For complete compatibility information for the various environments, please refer to the compatibility matrix in the Toshiba Computers Year 2000 Website at http://computers.toshiba.com or in the provided. The Website will always have the most up-to-date information. Portege Satellite/Pro T-models ================================================== 610CT T2150C Series T4900CT T3600CT T2450CT T4850CT T3400 100CS T4800CT T3400CT T2110CS T4700CS/CT T2130CS T6600 (all) T2130CT T4600 (all) T2100 Series T200/CS (Windows for Pen) T19xx (all) T2400C Series TOSH2000.COM should operate correctly on any Toshiba PC running current or previous versions of MS-DOS, Windows 95 or Windows for Workgroups. NOTE however that it cannot run properly under Windows NT, since Windows NT does not permit direct manipulation of the real time clock by DOS "TSR" stay-resident programs. The program is intended to be included in your AUTOEXEC.BAT file, so it can start runnning as soon as the computer is powered up. Thus it will correct an erroneous date rollover whether it occurs while powered on, suspended, or powered off. Its usage of system resources is negligible, and will not degrade your computer's performance in any way. When resident, the program occupies less than 500 bytes of memory. When TOSH2000.COM is first invoked, it will determine whether the computer model requires its services: If so, it will display the following message on the screen, and start running in the background: "Toshiba Year 2000 Assurance Driver loaded" Otherwise, the following message will be displayed, and the program will simply exit: "Toshiba Year 2000 Assurance Driver not required" A third possible message, which will be displayed if you run TOSH2000 under Windows NT, is: "TOSH2000 is not intended to run under MS-Windows NT - exiting" If you are unsure whether your machine requires this program, simply execute it at the DOS command prompt, or via a Windows DOS box. If the first message above is displayed, ("Driver loaded"), then you should add a line to your C:\AUTOEXEC.BAT file specifying the TOSH2000 program, such as "C:\TOSH2000\TOSH2000.COM" (or whatever path describes the location of the program). Installation instructions are provided below. If the second message above is displayed, you do not need this program. If the third message is displayed (because you are running Windows NT), and you are curious as to whether your machine requires year 2000 correction, you can copy TOSH2000.COM onto an MS-DOS-bootable diskette, if you have one available, and then boot up MS-DOS and execute TOSH2000. This program has not been tested on IBM OS/2, or any other operating system beyond what is discussed above. ============================================================================= INSTALLATION An INSTALL program is provided in this archive that will add this line to your AUTOEXEC.BAT file if you determine that it is required. To run the INSTALL program from Windows, double-click on the INSTALL.EXE icon in File Manager (Win 3.x), or Explorer (Win95). To run it from the DOS command line, change to the directory where you extracted the archive, and type: INSTALL and press <Enter>. The INSTALL program will look for TOSH2000.COM in the current directory. If found, a line that loads TOSH2000.COM will be prepended to your C:\AUTOEXEC.BAT file. If TOSH2000.COM is not found in the current directory, you will need to manually add this line to your AUTOEXEC.BAT file using an ASCII text editor. The following steps will help you to manually install TOSH2000. o From the MS-DOS prompt, open AUTOEXEC.BAT in the DOS editor by typing the following command: EDIT C:\AUTOEXEC.BAT and press <Enter> o From the Windows 3.x Program Manager, click "File", then "Run", and type: NOTEPAD C:\AUTOEXEC.BAT and Press <Enter> or click OK o From Windows 95, click "Start", then "Run" and type: NOTEPAD C:\AUTOEXEC.BAT and Press <Enter> or click OK Once AUTOEXEC.BAT has been loaded into the text editor, simply add the line: C:\TOSH2000\TOSH2000 at the top of the file, replacing the "C:\TOSH2000" path with the path to where you stored TOSH2000.COM on your system. If you stored TOSH2000.COM in the root directory of C: (C:\), simply add the line: TOSH2000 to the top of the file Save the file and exit the editor. You'll need to restart your computer in order for the changes to take effect. ============================================================================= TECHNICAL DETAILS for TOSH2000.COM Memory Requirements: Runtime: 900 bytes Resident: 330 bytes LoadHigh: Not tested. TOSH2000 is very small, so loading high will not offer a significant benefit. What it does: 1. Determines OS version number, and if it is specifically the WinNT version (i.e., DOS 5.50) it exits. 2. Saves current CMOS year and century, then sets them to 1900, then does a few "get bios date" calls. New BIOS have routines that monitor this condition (1900 is an illegal date), and change cmos to 2000 when detected. It is the "get BIOS date" call (int 1a func4) which triggers this BIOS check. The program then restores the original year/century, then looks at the one returned from the get date call. If it's not 20, the program makes itself resident. Otherwise it just exits. Once resident, the program serves as a front end for the "get BIOS date" call. It first allows the normal BIOS get date call to completely execute, then intercepts the values being returned to the caller, and does a simple check: if the year being returned is less than 80, it forces the century to 20 (and also writes the 20 back to cmos) and then the values, including the possibly modified century byte, are returned to the caller. **end**Download Driver Pack
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