Date   : Tue, 14 Mar 2006 08:10:32 +0100
From   : John Kortink <kortink@...>
Subject: Re: Web site: Mainly Master 512

On Mon, 13 Mar 2006 23:20:46 -0000, "David Harper" wrote:

>Just to let people know that I have thrown together a web site mainly on the
>Master 512.
>
>[...]
>
>Anyway the site is at: http://www.cowsarenotpurple.co.uk/bbccomputer
>
>(Sorry about the name - it means something to me)
>
>Have fun with this, or ignore it, as the mood takes you.

Could you correct the Free Space Map info regarding the
checksum. Most people don't seem to get this right. It's
not a plain sum but a sum /with carry/, which means that
every addition includes the carry from the last one
(starting with no carry). I.e. a sum as resulting from :

LDA #0
LDY #&FE
CLC
.loop
ADC addr,Y
DEY
BPL loop


John Kortink

-- 

Email    : kortink@...         
Homepage : http://www.inter.nl.net/users/J.Kortink

GoMMC, the ultimate BBC B/B+/Master storage system :
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