My First Laptop.

See my post:
My First Laptop ( Sony Vaio )

Why? VEXP works with any Chips&Tech video.

Nope, only with selected chips and properly works only with 640x480 and 800x600 resolutions. Even on proper chip, but with 1024x768 panel it just makes squeezed picture bigger, but not full screen.

Toshiba 460 gave me these results:

With bios stretch disabled vexp don’t change games output.

Bios option only affect 320x200 games, 640x480 always place itself in a centre of the screen:

Hi, got few questions I wanna clarify,

Firstly, could you please explain the difference between the C&T F65554 and the F65550 graphics chips? I noticed the F65554 is used in the current Toshiba 460CDT and my Siemens 710M, while the F65550 is found in the Toshiba 430CDT. What are the distinguishing features between these two 2D graphics cards? I was under the impression that prior to the advent of 3D accelerators, the CPU was responsible for most graphical computations while the GPU primarily handled image output. Is there a way to benchmark 2D GPUs?

Additionally, I have observed that older Toshiba models feature the ESS688 and Yamaha OPL3 sound chips, whereas the newer models only come with the Yamaha OPL3-SA. Could you shed some light on what happened to the ESS chipset in the newer models?

Regarding the sound card specifically, the OPL3-SA is not the same as the OPL3. The OPL3-SA is a whole sound chip whereas the OPL3 is just an FM synthesizer, so the OPL3-SAx/SA3 chips have additional features. The earlier Toshibas used the ESS688, which was basically everything that made up a sound chip of the time EXCEPT for the FM synth which it did not have internal emulation for, so pretty much any laptop that uses the 688 will have an OPL3 nearby to handle that.
The OPL3-SAx and similar chips seem great in theory but I've personally had driver problems in DOS and just haven't been able to get it working well, at least on my one laptop with the chip (WinBook XL). Might be issues specific to my machine.

Also, it is my understanding that the ESS 1688 is pin-compatible with the 688, but it does not require any additional hardware as it does FM synth internally.

vorob wrote on 2024-09-16, 18:23:

What are the distinguishing features between these two 2D graphics cards?

I can only provide fps comparison for some laptops:

TwinHead SlimNote P79TE, 65554 & 200Mhz MMX:
PC Player benchmark 640x480: 14.6 fps
Doom: 64.39 fps
Quake 640x480: 16.8 fps
Duke 3D 1st level street: 46 fps

Nec Versa 6200MX, 65550 & 166Mhz MMX:
PC Player benchmark 640x480: 12.5 fps
Doom: 59.18 fps

Mitsubishi Apricot EL, 65550 & 150Mhz MMX:
PC Player benchmark 640x480: 10.7 fps
Doom: 55.16 fps
Duke 3D 1st level street: 30 fps

Hitachi MX133T, 65550 & 133Mhz
PC Player benchmark 640x480: 11.4fps
Doom: 55.2 fps
Duke 3D 1st level street: 26 fps

Fujitsu LifeBook 635T, 65550 & 133Mhz
PC Player benchmark 640x480: 11.1 fps
Doom: 54.84fps
Duke 3D 1st level street: 17 fps

Toshiba Tecra 510CDT, 65550 & 133Mhz
PC Player benchmark 640x480: 10.1 fps
Doom: 36.45fps
Duke 3D 1st level street: 8.6 fps

Thanks! But this could also be because cpu is faster. Need to somehow balance them 😀

vorob wrote on 2024-09-17, 06:51:

Thanks! But this could also be because cpu is faster. Need to somehow balance them 😀

Yes, unfortunately I don't have laptops with similar CPU and different GPU. 65550 & 65554 is very similar, both produced in same time:

https://www.vgamuseum.info/index.php/cpu/item … nologies-f65550

https://www.vgamuseum.info/index.php/componen … s-b65554-hiqv64

vorob wrote on 2021-04-29, 21:34:

My God, why can't these laptops stretch 320x200 to full screen?)

You're missing some software, if you get hold of and run stretch.exe on any Toshiba laptop with the WD90C24 graphics chip then it'll stretch out to the full 320x240 / 640x480 with applications / games that display at 320x200 that would otherwise have black bars. I can't find this utility online anywhere other than in this archive of a T4850CT hard drive: https://archive.org/details/toshiba-t-4850-ct
Not the cleanest archive but here's the stretch utility which should work on all WD90C24 equipped Toshiba laptops:

That should include the:

• Toshiba T1950CT / T1960CT
• T2400CS / T2400CT / T2450CT
• T4700CT / T4700CS / T4800CT / T4850CT
• T3600CT / T3400? / and probably some others that I haven't realised.

Just been testing it on the T4850CT / T1950CT / T2450CT / T2400CS and it's good on all of them.

edit: For an installer, the 1RCA72.IMG (RCA72 Companion Disk) floppy image of the T2450CT recovery floppy disks is a proper installer for this. It just puts stretch.exe into the c:\dos directory and you can either type stretch manually or add it into the autoexec.bat

Thermalwrong wrote on 2024-10-30, 05:21:

You're missing some software, if you get hold of and run stretch.exe on any Toshiba laptop with the WD90C24 graphics chip then it'll stretch out to the full 320x240 / 640x480 with applications / games that display at 320x200 that would otherwise have black bars.

Thank you for working on my old message. I'll give it a shot. I remember having a similar utility on my laptop; it definitely stretched DOS text stuff but didn't affect games. I'll try your file. I keep this laptop mainly because of its mouse and its vintage look. However, I'm quite disappointed with its gaming performance, particularly the WSS sound, which I couldn't get to work under DOS. So, it's in the closet, waiting for better times.

Hello. I am lloking for some decent laptop, mostly for moo2, doom, and f29. Plus some latest dos / win98 games from novalogic. Which i run on celeron 300 before

While normally i am thinkpad fan, i do have some old siemens stuff. And there is plenty of siemens scenic mobile laptops. All looks similar case, some shows usb on pentium 166mmx. Some are pentium2 300mhz. Anb beeing siemens - they would be manufactured longer, compared to main stream laptops. So - how do they looks and feels in dos ?