76
Applications / Re: DOS VDM and Win-OS2 Fans ?
« on: March 18, 2020, 08:02:12 am »Having worked on eCS, the fact seamless WIN/OS2 sessions do not work has been the case since eCS. The cause is VSVGA.SYS. It does not matter if you install SNAP, Panorama or GRADD they all use the same VSVGA.SYS driver. Its pretty complex driver VSVGA.SYS that relies on the VESA BIOS/VGA hardware. It just seems not all support in around that VSVGA.SYS is looking for.
Roderick
Has nothing to do with eCS per se, it is simply a hardware issue, screen sizes have changed and the VSVGA driver has not been updated or re-written to comply with newer screen geometries. I can run DOS/Win sessions just fine here with eCS 2.1 but I have to choose a vintage screen geometry and have a screen that supports it, some NEC LCD's have excellent support for odd/vintage geometries, but they tend to be expensive.
VSVGA does support some high resolutions above UXGA (1600x1200), such as 3k for instance and possibly QSXGA (5:4) if I remember it correctly, but that is using geometries that are normally not supported on modern hardware. (IBM had a 3K screen for sale in the 90's, used for medical research etc., it had Win, AIX and OS/2 drivers.)