Date   : Fri, 12 Jun 1992 09:21:51 BST
From   : RWF Whitehand <R.W.F.Whitehand1@...>
Subject: Memory

> > Erk! That would be quite impressive! Well below page for a non-DFS or ADFS
> > machine...infact I think the OS might complain a little.
> 
> Not unless your Basic program was too large. In fact you can safely put
> PAGE down as far as &900, and have 1k in which to store your program and
> all it's variables, if you are willing to forego:
>   Page &9 - Envelopes 5-16/Serial Output,Speech/Cassette output
>   Page &A - Serial Input/Cassette input
>   Page &B - Function key definitions (Use OSBYTEs 225-228 to disable the
>             FN keys or use them for ordinary character codes)
>   Page &C - Character definitions for CHR$224 - CHR$255
> 
> Page &D is used by the Disc and Econet systems (and anything else which
> needs NMIs) not to mention the extended vectors and Rom workspace bytes,
> so this cannot be used.

My average BASIC program uses >1k and the serial port unfortunately, probably
the fnkeys too :-(
Anyhow, 'Challenger Host' has a re-written OS, so anything under &E00 has
been re-arranged and used much more efficently anyway :-)

Regards,

Richard.

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