🚀 go-pugleaf

in article <19400005@qtecmuc.UUCP>, ger@qtecmuc.UUCP says:
> does anyone know, if there is a way to distinguish between
> Functionkey F1, ALT-F1 and CTRL-F1 using C (MWC).
> All routines like Bconin or Crawcin don't make a difference at all.

What you need to remember is that the BIOS and GEMDOS calls return
a LONG value.  The highest byte of this value can contain the shift-key
state when the key was hit.  You tell the OS to put the shift key state
in that byte by setting bit 3 in the (published) system variable "conterm"
to 1 (that is, *(char *)0x484 |= 4;).  Better clear it again before
your program exits, though, because the desktop might not be able to
handle it (use *(char *)0x484 &= ~4;).

The upper byte is bit-mapped as follows (0 means up, 1 means down):

Bit	Key
0	Right shift
1	Left shift
2	Ctrl
3	ALT
4	Caps-lock (toggles with each press of the key)
5	Right mouse button
6	Left mouse button
7	Reserved, currently zero

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