Serial Port use in MS DOS mode.

Document ID: 94000610

Posted Date: 1996-08-19

Last Updated: 1996-08-19

Distribution: View Public Website

Applicable Models

Satellite 4000CDS

Satellite 4000CDT

Satellite 4010CDS

Satellite 4010CDT

Satellite 4020CDT

Information: The Serial Port (Default COM1 in the BIOS) can be accessed via Windows and DOS. However,
do to a unique condition the 40xx series machine the following conditions are true:

1. The Serial Port works via Windows

2. In MS-DOS mode the Serial Port work under the following conditions:

2.1 The machine is booted in to MS-DOS mode: Boot the system holding the F8 key and selecting
the "Command prompt only" option from the Microsoft Windows 95 Startup Menu.

2.1 From Windows 9X, accessing DOS from MS-DOS Prompt or setting up a shortcut to MS-DOS.

However, if the machine is shutdown from Windows 9X in to MS-DOS mode (Start, Shut Down,
Restart the computer in MS-DOS mode?) the serial port is disabled and will not respond.
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