[ct-user] Freq passing, window size

Robert A. Wilson n6tv at arrl.net
Sat Dec 9 19:51:13 EST 2006

On 12/9/06, John Bednar <k3ct at verizon.net> wrote:
> Laptop screen: The laptop display quality is dependent on how well
> the video chipset supports the 50 line mode. Some Savage video
> chipsets are known to have problems because they don't support this
> mode very well. I use a Dell D600 with the upgraded video option
> with CTWin and it looks just like my desktop in the 50 line
> character mode. My IBM T21 is unusable with CT 50 line character
> mode. I use CTWin on this laptop in the Windowed mode and change the
> font size.

If the problem is that the ThinkPad T21 only uses a small center portion of
the screen when in 50-line mode, try installing the ThinkPad Utilties for
DOS from


Then type PS2 HVEXP ON or equivalent.

Command Syntax : PS2  HVEXPansion  ON|OFf
Current State  : ON
Description    : Select 'ON' to display 640 by 480 resolution screen on the

If you have a different model of IBM ThinkPad with the same problem,
download the equivalent utility for your model from


Bob, N6TV

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