Date   : Tue, 22 Jul 1997 19:32:05 +0100
From   : Paul Theobald <PT@...>
Subject: Re: BBC Master hardware problem....some more info....

>----------
>From: 	Andy.Fox@...[SMTP:Andy.Fox@UK.Sun.COM]
>Sent: 	Friday, 18 July, 1997 1:47 PM
>To: 	bbc-micro@...
>Subject: 	[BBC-Micro] BBC Master hardware problem....some more info....

:
:

>My plan is to write a test image of known bytes into a sideways
>ram bank, and then examine it to see at what point this data gets
>corrupted.
>
>The only problem is that when looking at &8000 from BASIC, you 
>only see the BASIC rom (cause it's paged in).
>
>How can I write a basic (or assembler) program that will allow me to
>do a compare on the contents of the sideways RAM bank, ie. how do I
>look at the contents of the RAM without it being paged in at &8000?
>
On a BBC Master the easiest way is to make use of the built-in *SRWRITE
and *SRREAD calls to transfer the data to and from normal RAM.  Type
*HELP SRAM at the command prompt to get the syntax of these (and other)
sideways RAM utilities.  OSWORD 67 is the equivalent call from assembler
-- let me know if you want further details of this.