🚀 go-pugleaf

brown@NCoast.ORG (Stan Brown) writes:

>> while (kbhit()) getch();
>> while (bioskey(1)) bioskey(0);

> These two are very likely the same thing.  If they are implemented in
> the obvious way, however, they will miss keystrokes like F12.

The kbhit/getch version uses DOS calls (Int 21h, func. 0Bh and 07h,
respectively).  Note that the getch routine also contains support for
the ungetch function.

The bioskey routine calls BIOS (Int 16h, func. 01h and 00h).

True, an F12 keypress will not be detected by these calls; the BIOS
functions (0 and 1) will "automatically" ignore such keypresses.  Note
that Int 16h, functions 10h and 11h, on the other hand WILL grab such
keys.  However, since the goal is to flush the buffer, the bioskey
functions work just fine.  Note, furthermore, that Borland has NOT
implemented the 10h and 11h calls; i.e. you cannot simply call
bioskey(10h) to read an F12 keypress.

-- Jon
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