🚀 go-pugleaf

(1.3 code)

I want to create an AVIO presentation space with a *lot* of lines of
scrollback.  The documentation specifies that the total AVIO buffer must
fit in 64k.  This led me to believe that by specifying only one
attribute byte for each character cell, I could have 32k cells.  As
illustrated in the following code, this appears not to be the case.  I
can only get 16k cells, which suggests that VioCreatePS uses the same
limits as when creating a 3-byte attribute space.

================================================================
// Code that works:
#define AVIOBUF 16384U
#define VIDEOWIDTH 40U
// FORMAT_CGA defined as 1 in PMAVIO.H
#define NUMLINES ((AVIOBUF/(1+FORMAT_CGA)) / VIDEOWIDTH)
error = VioCreatePS(&hvps,NUMLINES,VIDEOWIDTH,0,FORMAT_CGA,0);
// error is 0.
================================================================
// Code that fails
#define AVIOBUF 32768U
... (the rest is the same as above)
// error is 421 (ERROR_VIO_INVALID_PARMS)
================================================================