Date   : Sat, 02 Aug 2003 09:07:04 +0100 (BST)
From   : "Nick B." <nickbeee@...>
Subject: Re: Teletext documentation

> I should have a few versions of the morley adapter instructions around
> - somewhere. I found the circuit for it last night along with the Care
> master copy cartridge instructions (or at leaset an early listing of
> the code with a draft of the instructions).

I'd be most interested to see those and perhaps get hold of a copy of the
ROM image? I'd be willing to scan them and put them up on my web pages.I've
still got ATS259 which came with the Morley adaptor from new but all
the instructions got lost at some point.
> The support ROM was
> originally the main teletext ROM until the BBC started playing silly
> games by finding every single part of the RTF specs we hadn't
> implemented properly  - in the end we had to pay for an 'official' ROM
> to be written by Graham Bartram to handle the telesoftware and force
> the adapter to 'look' like an Acorn :). The original ROM was kept as
> the support ROM as it had many extra *commands and features.


That explains the similarities between the ATS roms available on "The BBC
Lives", I discovered that ATS3 was the version for the Acorn adaptor, but
the user interface is identical apart from the tuning screens.
IMO the Morley was much better than the Acorn adaptor, with its electronic
tuning and the ability to save the tuning to disk or ROM. My only minor
complaint is that it uses the Beebs power supply to power it which is a
problem if you need the power for the disk drive as well.My Acorn adaptor
suffers terribly with tuning drift, one of my log-term
projects is to replace those horrible multiturn pots!
Regards,
Nick.