Date   : Sat, 14 Oct 2006 23:56:43
From   : jgh@... (Jonathan Graham Harston)
Subject: Re: Tube Documentation

>Message-ID: <4e7544afe7info@...>

Sprow <info@...> wrote:
>    Jonathan Graham Harston <jgh@...> wrote:
> > I've only ever found "TUBE 1.10" and "Co-Processor 1.10" in the wild and
>
> OK. Next time I'm at my parents I'll get it out of the loft, it had a
> handwritten sticker on the EPROM as I recall so might be a prototype?

Thanks.

> >     membot%=FNfx(&83,0,0)+65536*FNfx(&82,0,0)
> >     memtop%=FNfx(&84,0,0)+65536*FNfx(&82,0,0)
> >     PRINT "User memory from &";~membot%;" to &";~memtop%
>
> Isn't PRINT "User memory from &";~PAGE;" to &";~HIMEM
> easier?

Ok, so I should have written that in 32016 code, then ;)

In most instances you're right. However, PAGE>=membot and
HIMEM<=memtop. That doesn't always mean that PAGE=membot and
HIMEM=memtop.

When BASIC is entered, PAGE is set to membot and HIMEM to memtop,
but PAGE and HIMEM can later be changed.

I'm currently implementing a PDP Tube emulator, but that is
16-bit, so it's effectively irrelavant.

--
J.G.Harston - jgh@...                - mdfs.net/User/JGH
There are three food groups: brown, green and ice cream.