If it uses the CT65554 chip you'll need this:

http://web.archive.org/web/19990219171930/htt … com:80/vexp.htm

Thank you very much! It works!
In reality I don't know why, but my bios, "PHOENIXBIOS 4.0 release 5. 1" is a little bit cropped, and so all my dos things, even with the tsr!
It seems that I can't change resolution in bios, so maybe an updated version can solve the issue?

The BIOS screens will remain cropped as the TSR is loaded after that. Try VEXP M2 to see if that gives you full screen in DOS. Scaling graphics/text mode are seperate functions of the video card.

I tried M2, but the whole dos "space" stays inside "borders", the same ones of the bios! The tsr works but with these limits!
Do you think it's a think of my lcd laptop screen?

Can you post a pic? And your 800x600 application is full screen after using the TSR?

Hi,
The dos application just fills the portion of screen "allowed" by dos and bios "limits", probably because of the laptop lcd, because, when I use an external display in CRT mode it properly behaves.

This photo is without TRS

I know FastTracker II uses a 640x400 mode... Perhaps it tries to maintain square pixels or FTII uses some video signal trickery for its timing. Can you try Wolfenstein 3D? It has become my test game of choice to test videoscaling on my videocard.

drastikterror wrote:

Hi,
The dos application just fills the portion of screen "allowed" by dos and bios "limits", probably because of the laptop lcd, because, when I use an external display in CRT mode it properly behaves.

Yeah, this is normal behaviour because the TSR preserves the aspect ratio of the original resolution. Afaik, it can only scale neatly between resolutions that are multiples of each other, and since 1024p is not a multiple of 320p, you get the borders to make up the rest of the screen space.

Here we are...

Still borders 😒

Of course, first pic WITH tsr, second one WITHOUT

henryVK wrote:

Yeah, this is normal behaviour because the TSR preserves the aspect ratio of the original resolution. Afaik, it can only scale neatly between resolutions that are multiples of each other, and since 1024p is not a multiple of 320p, you get the borders to make up the rest of the screen space.

Ah, on my Savage4 card scaling also includes expansion to 4:3. I had the idea that the utility for the CT65554 worked in the same manner, as the FAQ states:
* Toggles DOS graphics expansion on/off (play DOS games full screen !)

But that might be with 640x480 panels only.

Ok.
The very strange thing is the borders on the bios, same ones of dos.
Do you know if there's something I can do?

Rawit wrote:

Ah, on my Savage4 card scaling also includes expansion to 4:3. I had the idea that the utility for the CT65554 worked in the sam […]
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henryVK wrote:

Yeah, this is normal behaviour because the TSR preserves the aspect ratio of the original resolution. Afaik, it can only scale neatly between resolutions that are multiples of each other, and since 1024p is not a multiple of 320p, you get the borders to make up the rest of the screen space.

Ah, on my Savage4 card scaling also includes expansion to 4:3. I had the idea that the utility for the CT65554 worked in the same manner, as the FAQ states:
* Toggles DOS graphics expansion on/off (play DOS games full screen !)

But that might be with 640x480 panels only.

That's what I first thought, but you are actually right, my other Toshiba Tecra with 800*600 panel does scale to fullscreen.

But I've had a 1024*768 Thinkpad that scaled just like this Siemens does. My guess is that it's down to the video chip and I cannot verify that the Scenic Mobile 710 actually has the CT65554.

Edit: nevermind, of course it does have a CT65554, VEXP wouldn't have worked in the first place if it didn't.

The BIOS will set a 400 line resolution, no matter what you do. No TSR will influence this.
I've just checked the CT6554 hardware register document. http://citeseerx.ist.psu.edu/viewdoc/download … p=rep1&type=pdf

Support for 1024 panels is mentioned, as is stretching. There is an option for vertical line replication, but not for horizontal. Perhaps if 400-line graphics stretching is enabled it will give you 4:3 aspect ratio, but still with borders as it does full integer scaling horizontally.

Thank you very much for the information!
So do you think it is possible to change this behavior? I am not expert in editing bios...

henryVK wrote:

That's what I first thought, but you are actually right, my other Toshiba Tecra with 800*600 panel does scale to fullscreen.

But I've had a 1024*768 Thinkpad that scaled just like this Siemens does.

Perhaps it's due to panel size.

drastikterror wrote:

So do you think it is possible to change this behavior? I am not expert in editing bios...

Not my expertise either... An updated TSR would perhaps be your best bet. Would be nice to have the source of VEXP.

I post the pics of the main video modes, LCD, CRT or BOTH, just to show the different behaviour.
Note that in exclusive CRT mode (with external display) the screen is completely filled.