As an extension to what Tom stated, it is most likely a timing issue, though I don't necessarily think it's the 'E0' scancode getting lost. The cursor movement & number pad keys do some weird things in the background that you don't normally see.
E.g., even when NumLock is on, and you hold down one of the Shift keys while pressing a key on the number pad, it acts like NumLock is off (the Shift keys "override" the NumLock state, just like they "override" the CapsLock state for the alpha keys). The cursor movement keys that you are having problems with, which are not on the number pad, are supposed to emulate the number pad keys. That is, they need to be aware of the NumLock state, and in some cases will send "fake shift" keys along with the actual key press to ensure that they always act like cursor movement keys no matter what the actual NumLock state is. This is complicated stuff that all happens in the background, and you normally don't even know that it's happening. Anyway, the bottom line is that I don't think it is the 'E0' scancode that is getting lost -- I think it is the "fake shift" keys that are periodically getting lost for some reason. You can download my SCANTEST program (it's included with the USB drivers) and can actually see all of the weird stuff that the keyboard does in the background. It may help you figure out what's going on (and it could conceivably be related to FDAPM). Just as another troubleshooting item, does it happen even when you don't have a special keyboard driver loaded (like MKEYB)? That is, does it happen with just the default (BIOS) keyboard driver? If so, (or perhaps even if not so), you might try the MS KEYB program. It completely replaces the BIOS keyboard driver. None of the other keyboard drivers replace the BIOS like MS KEYB does, they just indirectly extend the functionality of the BIOS. None of the other keyboard drivers I'm aware of are true replacements for MS KEYB. ------------------------------------------------------------------------------ Is your legacy SCM system holding you back? Join Perforce May 7 to find out: • 3 signs your SCM is hindering your productivity • Requirements for releasing software faster • Expert tips and advice for migrating your SCM now http://p.sf.net/sfu/perforce _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
