Date   : Thu, 11 Jul 2002 11:23:06 +0100
From   : Sprow <news@...>
Subject: Re: Master ET

In article <1026381914.3d2d585ad209d@...>,
   Michael Foot <mjfoot@...> wrote:
> Quoting Sprow <news@...>:

> > In article <6e554a544b%mjfoot@...>,
> >  Michael Foot <mjfoot@...> wrote:
> > > I picked up a couple of Master ET machines recently. Since they have
> > > MOS 4.00 in them, which is not available on the web, I would like to
> > > try and dump this if possible. 

> > Simply 
> >  *SAVE mainos C000 +4000
> > though the names hidden behind fred/jim/sheila wont be accessable unless
> > you
> > take the chip out and read it manually.

> OK, I'll try this again. There should not be any code hidden in 
> &FC00-&FE00 hopefully. 

No hidden code,just a list of credits - the usual crew,Roger Wilson et al.

> I tried setting bit 6 of ACCCON so I could read this area of the ROM 
> but it locked the machine up.

I hope you disabled interrupts first?

> > Then the remaining 3 images are all sideways and there are plenty of
> > programs about to save those - you should end up with a 64k image.

> Slot F has MOS 4.00, E has ANFS 4.25 and D has BASIC 4.00. Are these the 3 
> you mean? 

Correct.

> Having MOS in slot F is strange and the saved contents are
> different then what I got from reading &C000 + &4000.

It should really have been called "More of the MOS" not just "MOS" - it's
all the none core stuff which can go anywhere.Sound code,fonts,circle
plotting blah blah.

> > The OS ROM in mine is just an EPROM
> > with a hand written label - they obviously didn't think it was worth
> > doing a mask,

> Yes, mine are the same. In fact the inside of the machine looks like 
> someone has taken half of it for parts. :)

All the non network related chips are gone to save a few pennies,
Sprow.