Re: OT (FAO Ian Oliver and any speccy programmers)

["Jason Lee" <jasonjlee@xxxxxxx>]

Thanks Ian!

Don't like to have too many unanswered questions cluttering up my brain...

I did always guess as much, but its nice to have it confirmed. If the Amiga
used tricks like stack moving and pushing all the regs, I guessed that I
missed a few tricks back on the speccy.

If you are in Leeds, do you know any of the guys from Vektor Graphics back
when they started? Their First game was Fighter Bomber...

Regards

Jason



----- Original Message -----
From: "Ian Oliver" <ioliver.lists@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Saturday, August 11, 2001 8:25 PM
Subject: Re: [ukha_d] OT (FAO Ian Oliver and any speccy programmers)


> > great game..never did manage to beat it.. wasn't there a writeup
on it
in
> > edge a few months back..(I just checked issue 95) I love those
articles...
>
> Yup, not a bad article.
>
> > I had a spectrum 16K as my first machine, (Still have my kempston
joystick!)
> > and I remember starstike, that was a great game too.
>
> One of our best, and one that made us loads of money when we were
three
> students living in a back-to-back terrace!
>
> > The screen was split into three.  Each third worked as follows...
>
> Don't remind me!  The tricks were many and varied, but for the most
part
we
> used an off-screen buffer that was in linear order and copied this in
screen
> order while beam chasing. This involves letting the TV refresh get
just
ahead
> of you, copying like the clappers, and getting everything across
before
the
> beam comes back around.
>
> > The question is, How is it possible to smooth scroll a spectrum
screen....?
>
> Clever code, lots of look-up tables (often accessed by pointing the
stack
at
> them and doing pops), lots of "unofficial" instructions and
an intimate
> knowledge of the processor/system you're using.
>
> Hacker stuff, basically. Which is why I'm doing my home automation in
Java -
> it's something a bit different.
>
> Regards
>
> Ian Oliver
> Sunny Leeds, UK
> Using Java on Tini for control via Dallas 1-wire
>
>
>
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