Re: one or two lines scrolling

From: Spiro Trikaliotis <ml-cbmhackers_at_trikaliotis.net>
Date: Fri, 18 Oct 2019 16:52:08 +0200
Message-ID: <20191018145208.GK7345_at_hermes.local.trikaliotis.net>
Hello,

* On Fri, Oct 18, 2019 at 04:06:18PM +0200 Anders Carlsson wrote:
> Spiro Trikaliotis wrote:
> 
> > Note, however, that the VIC20 is a little bit different, although the
> > code is almost identical: It can link up to 4 lines together, yielding
> > to a maximum input line length of 4*22=88 characters.
> 
> True, but even in that case the link table consists of MSB of the screen
> matrix (i.e. $1E, or $04 on the C64) + $80 for lines not linked so the
> principle to ORA by $80 will break up linked lines on the VIC-20 as well as
> the C64, except here up to 4 physical lines may be linked into one logical
> one.

That's what I wanted to say, in principle. That's also why I said that
the code is "almost" identical.

Regards,
Spiro.

-- 
Spiro R. Trikaliotis
http://www.trikaliotis.net/
Received on 2020-05-29 23:15:04

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