Hi
Thanks for the advice offered, I'm going down the route that IC8 6522 is
toast.
Does anyone have a source of 6522 chips suitable for a master ?
Beebmaster doesn't list them, Sprow only has nmos versions, i've
searched fleabay with no success...
Thanks
Howard
--
The problem with America is stupidity. I'm not saying there should be a
capital punishment for stupidity, but why don't we just take the safety
labels off of everything and let the problem solve itself?
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> Does anyone have a source of 6522 chips suitable for a master ?
Mark at Retroclinic probably does...
http://www.retroclinic.com/acorn/acorn.htm
Paul
Wookie,
Just wondered if you had downloaded the Master repair guide from Chris' Acorns
site.
http://acorn.chriswhy.co.uk/Computers/MasterComputers.html
Acorn Master Series Hardware Specification (Feb 86)
I think that there is some good info there with some more waveform measurements
that can be made as as final diagnosis before you comdemn the 6522.
If all else fails, I do have here a new R65C22 but I think it is my last one.
I may be persuaded to sell it, as these parts are now scarce, I would advise
removal of the old one without physically damaging it and then fitting a
socket. In that way, if the fault is not cleared, the original chip can be
refitted.
Keep us informed of how you get on.
Kim
On Thu 17 May, Wookie wrote:
>
> Hi
>
> Thanks for the advice offered, I'm going down the route that IC8 6522 is
> toast.
>
> Does anyone have a source of 6522 chips suitable for a master ?
>
> Beebmaster doesn't list them, Sprow only has nmos versions, i've
> searched fleabay with no success...
>
> Thanks
> Howard
> --
> The problem with America is stupidity. I'm not saying there should be a
> capital punishment for stupidity, but why don't we just take the safety
> labels off of everything and let the problem solve itself?
>
> _______________________________________________
> bbc-micro mailing list
> bbc-
> http://lists.cloud9.co.uk/mailman/listinfo/bbc-micro
>
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On 17/05/2012 22:58, Kim Faulkner wrote:
> If all else fails, I do have here a new R65C22 but I think it is my last one.
> I may be persuaded to sell it, as these parts are now scarce, I would advise
> removal of the old one without physically damaging it and then fitting a
> socket. In that way, if the fault is not cleared, the original chip can be
> refitted.
Another option may be to source the WDC65c22, which IIRC is still being
manufactured (along with the WDC65c02), I did buy some a while back and
so they are available in the UK.
Both seem to be available from Mouser, who though based in the USA ship
to the UK (pretty quickly from what I remember).
Anyway the 65c22 is here :
http://uk.mouser.com/ProductDetail/Western-Design-Center-WDC/W65C22N6TPG-14/?qs=opBjA1TV901Z3OxxsEhnnty%252bIuDyPraBIWs34aiSsUs%3d
Note I have not tried this in the Master, but my Atom clone uses both
the 65c02 and the 65c22.
Cheers.
Phill.
--
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
"You can twist perceptions, but reality won't budge" -- Rush.
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On 17/05/2012 21:46, Wookie wrote:
> Hi
>
> Thanks for the advice offered, I'm going down the route that IC8 6522 is
> toast.
>
> Does anyone have a source of 6522 chips suitable for a master ?
>
> Beebmaster doesn't list them, Sprow only has nmos versions, i've
> searched fleabay with no success...
>
> Thanks
> Howard
Hi Howard,
I've got a couple to hand if you're still in need of one, marked MOS
6522 1882 on the top and HONG KONG HM165101 on the underside.
Cheers,
Mike.
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On 17/05/12 22:58, Kim Faulkner wrote:
> Wookie,
>
> Just wondered if you had downloaded the Master repair guide from Chris' Acorns
> site.
>
> http://acorn.chriswhy.co.uk/Computers/MasterComputers.html
Yep!
>
> Acorn Master Series Hardware Specification (Feb 86)
>
> I think that there is some good info there with some more waveform measurements
> that can be made as as final diagnosis before you comdemn the 6522.
Unfortunately I don't have a scope, only a dmm.
> Keep us informed of how you get on.
I will, there's nothing better than a happy ending after giving someone
advice.
Thanks for all the replies, I've ordered a couple off Mark/RetroClinic
Cheers
Howard
--
The problem with America is stupidity. I'm not saying there should be a
capital punishment for stupidity, but why don't we just take the safety
labels off of everything and let the problem solve itself?
_______________________________________________
bbc-micro mailing list
bbc-
http://lists.cloud9.co.uk/mailman/listinfo/bbc-micro
)
Not very local to you I know but in .au I got some here late last year
http://www.rockby.com.au/searchres_11.cfm?searchkey=6522
Alan
-----Original Message-----
From: bbc-micro-bounces+awilliams=
[mailto:bbc-micro-bounces+awilliams=] On
Behalf Of Phill Harvey-Smith
Sent: Friday, 18 May 2012 9:35 AM
To: bbc-
Subject: Re: [BBC-Micro] Anyone know where I can get a 6522
On 17/05/2012 22:58, Kim Faulkner wrote:
> If all else fails, I do have here a new R65C22 but I think it is my last
one.
> I may be persuaded to sell it, as these parts are now scarce, I would
> advise removal of the old one without physically damaging it and then
> fitting a socket. In that way, if the fault is not cleared, the
> original chip can be refitted.
Another option may be to source the WDC65c22, which IIRC is still being
manufactured (along with the WDC65c02), I did buy some a while back and so
they are available in the UK.
Both seem to be available from Mouser, who though based in the USA ship to
the UK (pretty quickly from what I remember).
Anyway the 65c22 is here :
http://uk.mouser.com/ProductDetail/Western-Design-Center-WDC/W65C22N6TPG-14/
?qs=opBjA1TV901Z3OxxsEhnnty%252bIuDyPraBIWs34aiSsUs%3d
Note I have not tried this in the Master, but my Atom clone uses both the
65c02 and the 65c22.
Cheers.
Phill.
--
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
"You can twist perceptions, but reality won't budge" -- Rush.
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