Date   : Fri, 04 Nov 2005 14:40:13 +0000
From   : Richard Gellman <splodge@...>
Subject: Re: Parts blag

Chris Priest wrote:

>What's the socket location, I'll compare with one of my other B's :)
>  
>
 From memory (its been a while since I looked inside a B) is roughly at 
the top left of the bottom right corner - i.e. divide the board into 4, 
take the bottom right piece, and the chip is roughly in the top left of 
that.

Or, to put it another way, just behind the keyboard (in front of being 
where you would normally sit).

On a Master, the chip is more towards the top left of the board, quite 
near the video circuitry (PAL encoder, etc).

-- Richard

>
>-----Original Message-----
>From: Majordomo List Manager [mailto:majordomo@...] On Behalf Of
>Richard Gellman
>Sent: 04 November 2005 11:58
>To: bbc-micro@...
>Subject: Re: [BBC-Micro] Parts blag
>
>Chris Priest wrote:
>
>  
>
>>I have a box full of chips that have been salvaged from dead Beeb's, I am
>>not sure what the part number is, but let me know and I'll have a rummage
>>and see if I have one.
>> 
>>
>>    
>>
>Oooo uh um.. Can I have a sport question please?
>
>I have no idea off hand what the part number would be (and not being at 
>home right now cannot easily check). Also, I believe there are different 
>varieties of VIDPROC from different chip manufacturers.
>
>If it helps, you're looking for a ROM-sized chip (28 pins-ish), that 
>looks like no identifiable BBC micro component (e.g. a 6845 or SAA5050 
>would be obvious chips, whereas this one is not obvious at all). Some 
>beebs had Ferranti VIDPROCs, some had later Acorn versions. Possibly 
>another chip maker made them for Acorn too? (Could be talking readily 
>from betwixt my buttocks on that one).
>
> From memory, the Ferranti VIDPROCs were made with the lesser-found 
>"smooth" (almost reflective) plastic black casing, as opposed to the 
>traditional dark grey ceramic casing (as used by (some?) later Acorn 
>VIDPROCs).
>
>Any of this help?
>
>-- Richard
>