IBM ThinkPad 755CX, Manual

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Software Considerations
What You Need for Your Computer
The operating systems supported by the computer are:
IBM DOS Version 7.0 or later
IBM DOS Version J6.3/V or later
IBM Operating System/2 (OS/2) Warp Version 3.0
IBM Operating System/2 (OS/2) Version 2.11
Microsoft Windows Version 3.11 or later
Microsoft Windows for Workgroup Version 3.11 or later
When installing an operating system, you also must install the
following software in addition to the operating system for your
computer to operate correctly:
ThinkPad Features program
PCMCIA device driver
ThinkPad display driver
Mwave support software
Infrared support software
Important
If you will be installing Windows Version 3.11 or later, you must:
Install the ThinkPad display driver instead of the default
device drivers that came with Windows Version 3.11.
Type C to select Custom Setup when the Windows Setup
program asks you to select Express Setup or Custom
Setup.
Hints and Tips
If you are using DOS and do not use PC Cards, you can increase the
memory area for application programs by releasing the area used for PC
Cards. See “Releasing the PCMCIA Memory Area” on page 240 for
details.
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IBM ThinkPad 755CX User's Guide