Date : Tue, 17 Feb 2004 00:25:15 GMT
From : Wookie <WookieMan@...>
Subject: Re: Unknown chip
In message <Marcel-1.53-0215204544-d07xSBG@...>
Johan Heuseveldt <johan@...> wrote:
> Hi Mike,
>
> On Sun 15 Feb, Mike Tomlinson wrote:
> > In article <Marcel-1.53-0213215929-0b0xSBG@...>, Johan
> > Heuseveldt <johan@...> writes
> >
> > > In the process of cleaning, one of the BBC machines has a small box -
> > > which I had forgotten about - with a few roms and an unknown chip (to me)
> > > in it. The unknown chip is a plastic DIL, 2 x 12, and the texts are:
> > >
> > > CN48415N
> > > 00201752-01
> > ^^^^^^^^^
> > This is the Acorn part number.
>
> Ah. Then no doubt someone can tell us what it means. But no doubt he's also
> not on the list or even close. Wishing to be wrong on the latter.
>
> > I can't open your .zip file (Winzip says it's not a valid archive.)
Bah windoze users... zip file is fine with a decent file archiver :-)
SparkFS 1.37 (26-Feb-2000)
>
> Sorry to hear that. I just checked it again, and it's all ok here.
> SparkFS 1.27 (10-May-1994) was used.
>
> > Are you sure it's 24-pin?
>
> Yes, I am! :-)
> Hopefully others can use the .zip file and can confirm it is.
I've converted it to a jpeg so you can all have a look...
www.wookieman.pwp.blueyonder.co.uk/screen.jpg
>
> > IIRC, the only 24-pin chip in the Beeb is the 6850 ACIA (serial chip), but
> > that will be clearly marked as such, and it's a Motorola, not Acorn, part.
>
> I'm pretty sure all of these are true, but that's just me.
>
> > If it is actually 28-pin, and given that you found it in a box of roms,
> > I'd plug it into a ROM socket, switch on, and do a *HELP to see if it
> > responds. If not, try jumping into it with *FX142,n where n is the ROM
> > socket number to see what is printed on screen.
>
> See other mail to Chris for this.
>
>
> greetings,
> johan
>
Cheers Wookie.
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