Date   : Tue, 06 Dec 2005 15:32:37 +0000
From   : Richard Gellman <splodge@...>
Subject: Re: Test Sideways Ram

Andrew Benham wrote:
> Richard Gellman wrote:
> 
>> I believe on the B ROMSEL is actually readable (ISTR its not on a 
>> Master, hence interrogation of &F4, the MOS's copy).
> 
> 
> Other way round.  ROMSEL on the B is a write-only register, hence
> &F4 being a copy.  On the Master, ROMSEL is read/write - with &F4
> still a copy (as that's what Beeb programmers had come to expect).
> 

Ahhh. *enlightened*

As you may have noticed, I have terrible trouble remembering all these 
little things... :)

-- Richard