Date   : Sun, 13 Jun 1999 15:02:17 +0100
From   : Iain Williamson <Iain@...>
Subject: Re: BBC 8271 commands

In message <3.0.5.32.19990611164707.0092e510@...>
          Michael Foot <mikef@...> wrote:

> Hi,
> 
> I'm wanting to know exactly how the BBC controlled the disc via the 8271
> chip so I can emulate it properly. Can anyone fill in or correct the
> locations in the memory map below?
> 
> FE80 read status register, write command
> FE81 read result register, write parameter
> FE82 *write reset register*

> FE84 read/write data register

According to the excellent Advanced Disk User Guide (Colin Pharo), that's
it (I've just added FE82). I've removed references to FE83, and FE85
onwards, since it doesn't specify whether these are unused, or used by
some other system.

Appreciate the emulator, BTW.

-- 
  /^^\          Iain Williamson
 C  oo      Computer systems engineer 
 _(  ^)
/    ~\