collapseos/blk/083

C<? is a flag indicating whether a character is waiting in the
input stream. 1 means yes, 0 means no. It is the responsibility
of C<* to update that flag.

WORDBUF is the buffer used by WORD

BOOT C< PTR is used when Forth boots from in-memory
source. See "Initialization sequence" below.

XYPOS Current position of the cursor on screen. The meaning of
the pos in terms of row and cols is driver-dependent.




                                                        (cont.)