BBC Circuit diagram

discuss both original and modern hardware for the bbc micro/electron
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JannievanZyl
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BBC Circuit diagram

Post by JannievanZyl » Sun Jan 21, 2018 4:58 pm

Most of the circuit diagrams I've found on the web are not very clear.

Found an original diagram so scanned it in. Hope this is of use to someone.
BBC-circuit.pdf
(4.45 MiB) Downloaded 844 times

Kazzie
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Re: BBC Circuit diagram

Post by Kazzie » Sun Jan 21, 2018 7:06 pm

That's the best scan of an original I've seen on the web, thank you.

I've been making use of a (digitally) redrawn diagram hosted on 8BS.
BBC Model B 32K issue 7, Sidewise ROM board with 16K RAM
Archimedes 420/1 upgraded to 4MB RAM, ZIDEFS with 512MB CF card
RiscPC 600 under repair
Acorn System 1 home-made replica

cmorley
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Re: BBC Circuit diagram

Post by cmorley » Sun Jan 21, 2018 7:11 pm

Kazzie wrote:That's the best scan of an original I've seen on the web, thank you.

I've been making use of a (digitally) redrawn diagram hosted on 8BS.
Yes good scan. I've been using the tribbeck one but not on its own because it has errors... some pin numbers and IC numbers are wrong. Can't remember which ones off the top of my head.

JannievanZyl
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Re: BBC Circuit diagram

Post by JannievanZyl » Sun Jan 21, 2018 7:30 pm

Cool, I literally just scanned it first pass. Shows how good the scanners have become. This was an HP7612.

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1024MAK
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Re: BBC Circuit diagram

Post by 1024MAK » Sun Jan 21, 2018 7:36 pm

I often use the one from here, mainly because I have bookmarks on most of my devices / computers to this page...

But I welcome any good quality scans of schematic drawings =D>

Mark

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DutchAcorn
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Re: BBC Circuit diagram

Post by DutchAcorn » Sun Jan 21, 2018 8:21 pm

Great scan, thanks for sharing!

This one is my favorate:
BBC B schematics clean.png
Paul

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tricky
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Re: BBC Circuit diagram

Post by tricky » Sun Jan 21, 2018 8:29 pm

Thanks that is much better than the one that I got with my beeb.

cmorley
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Re: BBC Circuit diagram

Post by cmorley » Sun Jan 21, 2018 8:53 pm

DutchAcorn wrote:This one is my favorate:
BBC B schematics clean.png
That's the same as BBCBschematicJTribbeck.png that kazzie linked to. That's the one that has some errors.

dominicbeesley
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Re: BBC Circuit diagram

Post by dominicbeesley » Sun Jan 21, 2018 9:10 pm

Ooh that's much clearer than the one I've been using. Where did you source the hard copy?

PS: thanks for sharing!

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Re: BBC Circuit diagram

Post by dominicbeesley » Sun Jan 28, 2018 12:07 pm

I'm still interested where you got this from Jannie,

I've spotted some differences to my "canonical" one (103,000/C of Issue 9 7/83) it would be good to know any information that could date it.

(I've not looked hard, but just now I spotted D4/D5 specified as not fitted on the issue 9 diagram but no note on Jannie's diagram).

Does anyone know if D4/D5 were ever fitted, I can't see there being much point other than maybe a boot up check?

D

JannievanZyl
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Re: BBC Circuit diagram

Post by JannievanZyl » Sun Jan 28, 2018 11:22 pm

I got it in a box with 2 beebs and some other documentation. Not sure where exactly it came from. Will see how far back I can trace it.

Retika
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Re: BBC Circuit diagram

Post by Retika » Tue Feb 05, 2019 8:59 am

Indeed great output. I've been utilizing the tribbeck one yet not all alone in light of the fact that it has mistakes... some stick numbers and IC numbers aren't right. Can't recall which ones off the highest point of my head.

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