🚀 go-pugleaf

graeme@emtel.demon.co.uk (Graeme Brown) wrote:

>I have been having a strange problem on a PC that I need some help
>with....

>The machine is a clone 486/66, running DOS 6.2 and WFWG 3.11; VLB
>m/board with 4Mb Ram and a Trident 512K ISA video card. 

>Regularly if you try to open a file (not necessarily the same file,
>and not a very big one at that) the screen goes blank for a moment,
>then displays a distorted picture (horizontal lines) and then after a
>couple of seconds goes back to the original screen, but with the
>overall picture size shrunk, and the colours dimmed (a bit). The
>machine does not hang at any point, and continues to respond to the
>keyboard throughout and after all this shenannigans.

>I have checked the swapfile settings, reloaded all the video drivers,
>tried different drivers, tried different monitors, checked for
>viruses, even formatted the hard drive and reloaded Dos and Windows. I
>have now run out of ideas, so any help much appreciated.

>Incidentally, I have just noticed that Memmaker won't run on this
>machine, saying "No upper memory created", so I wonder if it is a
>hardware (ie memory) fault.

>Thanks for your help in advance.

>Graeme
>* E-mail: graeme@emtel.demon.co.uk
>* Packet: GM1JZQ@GB7EDN.#77.GBR.EU
>* Mobile: 0374 776700

Give us some more info:
- Your config.sys / autoexec.bat
- What error message are you getting on an F8 boot at the EMM386 load?

- What app is this happening in? (Windows, DOS pgm in Windows, ???)
- Is it happening with standard VGA driver (assuming Windows) or only
card-specific driver?