Tandy 1400 Laptop Clock Problem Under MS-DOS 5.0 and Later (77239)

The information in this article applies to:
    Microsoft MS-DOS operating system 5.0
    Microsoft MS-DOS operating system 5.0a
    Microsoft MS-DOS operating system 6.0
    Microsoft MS-DOS operating system 6.2
    Microsoft MS-DOS operating system 6.21
    Microsoft MS-DOS operating system 6.22

This article was previously published under Q77239


When running Microsoft MS-DOS 5.0 and later on a Tandy 1400 laptop, the clock will not function properly because of the nonstandard implementation of the clock on the Tandy 1400. The clock will be reset each time the computer is booted and it won't be incremented while an application is running.


The Tandy 1400 laptop comes in three models: LT, FD, and HD. On these models, the clock is a function of the DOS shipped with the computer. The clock will only function correctly under the original version of DOS shipped with the machine. The following list describes Tandy 1400 laptop models and corresponding DOS versions:
   Model   DOS Version
   -----   -----------
   LT      Tandy DOS 3.2003 or 3.2004
   FD      Tandy DOS 3.3004
   HD      Tandy DOS 3.3004
The products included here are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

Modification Type: Major Last Reviewed: 5/12/2003
Keywords: KB77239