Possibly Unscanned Acorn Circuit Diagrams - Need Help!

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flibble
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Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby flibble » Thu May 25, 2017 2:06 am

Whilst at ABUG Camby, CCH gave me a folder of Acorn docs to see if there was anything of interest in it.

Part of it is a collection of circuit diagram for the System, Atom, BBC and Electron series of machines. There does appear to be unscanned items in each category.

The Help I need is, is there anyone in the London-ish area with access to an A3 scanner that doesn't mind me turning up with about 40 sheets to scan? :)

I've checked the following site and (OLD) means I think diagrams are already scanned

  • http://mdfs.net/Info/Comp/BBC/Circuits/
  • http://stardot.org.uk/mirrors/www.bbcdocs.com/joomla/indexb758.html?option=com_content&view=article&id=59&Itemid=53

Atom Things

  • (OLD) Circuit Diagram for Atom Microcomputer
  • (OLD) Atom/BBC BASIC Conversion card (102,007/C)
  • Circuit Diagram for Atom 50Hz TV Convertor (102,003/C)
  • Atom Colour Board (PAL) (102,006/C)
  • Circuit Diagram for Atom Econet PCB (102,002/C)
  • Circuit Diagram for Atom Disk Pack (106,000/C)

BBC Things

  • (OLD) Circuit Diagram for BBC Microcomputer (103,000/C)
  • (OLD) Circuit Diagram for BBC Microcomputer (another version)
  • (OLD)6502 2nd Processor (A1/108,000/C)
  • 6502 Second Processor Module General Assembly (drawing of case not diagram)
  • (OLD) Circuit Diagram for Z80 2nd Processor (A1/109,000/C)
  • Z80 Second Processor General Assembly (drawing of case not diagram)
  • Teletext Decoder Card (104,000/C)
  • Teletext Adapter Unit Final Assembly drawing
  • (OLD) Prestel Adapter Circuit Diagram (115,000/C) (bbcdocs version slightly different edition)
  • Prestel Adapter Unit Final Assembly Drawing (A1/0015,000/A)

Data Recorder Things

  • ANF03 Schematic Diagram
  • ANF03 Wiring Diagram
  • ANF03 Component Layout (Bottom view)
  • ANF03 Component Layout (Top view)

System Things (some have been previously available in different editions)

  • (OLD) 6502 Microcomputer PCB Circuit Diagram (System 1) (100,000/C)
  • (OLD) Keyboard, Display & Cassette Interface PCB (System 1) (100,001/C)
  • 40 x 25 VDU PCB (Teletext) (100,002/C)
  • 8K RAM + 8K PROM PCB Circuit Diagram (100,003/C)
  • Floppy Disc Controller PCB Circuit Diagram (100,004/C)
  • 6502A Microcomputer Circuit Diagram (100,005/C) (not System 1)
  • Block Relocating In-Circuit Emulator Circuit Diagram (100,006/C)
  • PROM and EPROM Programmer (100,007/C)
  • Versatile Interface Circuit Diagram (100,009/C)
  • 32K Dynamic RAM Circuit Diagram (100,010/C)
  • ASCII Keyboard Circuit Diagram (100,013/C)
  • Circuit Diagram for Analogue Interface (100,014/C)
  • Circuit Diagram for Laboratory Interface PCB (100,015/C)
  • Circuit Diagram for Interface Panel PCB (100,017/C)
  • Circuit Diagram for Daisy Wheel Printer Interface (100,018/C)
  • 80 x 25 VDU Interface Circuit Diagram (100,019/C)
  • IEEE 488 Bus Interface (100,200)
  • Econet Node Circuit Diagram (Eurocard Version) (100,024/C)
  • 8K CMOS RAM (100,027)
  • Acorn Bus Interface Circuit Diagram (100,031/C)

Electron Things

  • (OLD) Circuit Diagram for Electron Microcomputer Main PCB (105,000/C) (mdfs version slightly different edition)
  • Electron Microcomputer Final Assembly (005,000/A) (Drawing not diagram)
  • Electron Plus 1 PCB Circuit Diagram (0119,100/C)
  • Electron Plus One Assembly (0119.100/A) (Drawing not diagram)

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daveejhitchins
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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby daveejhitchins » Thu May 25, 2017 6:52 am

Just a thought . . .

Why don't you have then done professionally? I'm sure there would be lots of donations to cover the costs . . . I would be one to donate!

Dave H :D
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Products: ARA II, ABR, ATI, AP6, MGC, AP5 . . .
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lazarusr
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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby lazarusr » Thu May 25, 2017 10:45 am

If you can come to Central London one evening, I am pretty sure that the scanners at work are A3.

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1024MAK
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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby 1024MAK » Thu May 25, 2017 10:50 am

Depending on the quality, it may be worthwhile scanning the items where there are already images available. In order to get much higher resolution images. I say this, because a fair number of the schematics that are available on the internet have sections that are hard to read :(

Mark
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SteveBagley
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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby SteveBagley » Thu May 25, 2017 12:33 pm

flibble wrote:System Things (some have been previously available in different editions)

  • (OLD) 6502 Microcomputer PCB Circuit Diagram (System 1) (100,000/C)
  • (OLD) Keyboard, Display & Cassette Interface PCB (System 1) (100,001/C)
  • 40 x 25 VDU PCB (Teletext) (100,002/C)
  • 8K RAM + 8K PROM PCB Circuit Diagram (100,003/C)
  • Floppy Disc Controller PCB Circuit Diagram (100,004/C)
  • 6502A Microcomputer Circuit Diagram (100,005/C) (not System 1)
  • Block Relocating In-Circuit Emulator Circuit Diagram (100,006/C)
  • PROM and EPROM Programmer (100,007/C)
  • Versatile Interface Circuit Diagram (100,009/C)
  • 32K Dynamic RAM Circuit Diagram (100,010/C)
  • ASCII Keyboard Circuit Diagram (100,013/C)
  • Circuit Diagram for Analogue Interface (100,014/C)
  • Circuit Diagram for Laboratory Interface PCB (100,015/C)
  • Circuit Diagram for Interface Panel PCB (100,017/C)
  • Circuit Diagram for Daisy Wheel Printer Interface (100,018/C)
  • 80 x 25 VDU Interface Circuit Diagram (100,019/C)
  • IEEE 488 Bus Interface (100,200)
  • Econet Node Circuit Diagram (Eurocard Version) (100,024/C)
  • 8K CMOS RAM (100,027)
  • Acorn Bus Interface Circuit Diagram (100,031/C)


I think I scanned and uploaded a lot of these here: viewtopic.php?f=44&t=11313

Steve

eXne
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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby eXne » Thu May 25, 2017 3:56 pm

I do have a color A3 scanner and access to a A0 scanner.
However I'm not in the London area but in Haarlem, The Netherlands.
Sending the schematics is not an option I guess?

Etienne

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SimonSideburns
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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby SimonSideburns » Fri May 26, 2017 8:02 am

I'm just outside of Portsmouth and I have an A3 scanner/copier/printer.

Wouldn't be too difficult to do, if you're happy with driving down to the South coast.

Let me know if that helps and I can PM you an address and we can work out when you can come down.
I'm writing a game where you can change your character from a Wizard to a monkey to a cat.

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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby flibble » Thu Jul 27, 2017 8:40 am

An update, this week I have access to an A3 scanner, but it doesn't quite have my ideal specs, only scans to compressed jpeg.

Here is a scan of the Electron Plus 1 diagram at 600dpi greyscale JPEG, at this res it is very readable and the slight badness in the scan is mainly down to the photocopiedness of the original.

0119,100-C Electron Plus 1 PCB Circuit Diagram.jpg


If people think this is an acceptable version I'll start to scan the rest of them.

paulb
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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby paulb » Thu Jul 27, 2017 2:24 pm

flibble wrote:An update, this week I have access to an A3 scanner, but it doesn't quite have my ideal specs, only scans to compressed jpeg.

Here is a scan of the Electron Plus 1 diagram at 600dpi greyscale JPEG, at this res it is very readable and the slight badness in the scan is mainly down to the photocopiedness of the original.

0119,100-C Electron Plus 1 PCB Circuit Diagram.jpg

If people think this is an acceptable version I'll start to scan the rest of them.


Firefox appears to hold back on showing the full resolution on my machine, but in the GIMP, I can see that there is more detail. I'm not really convinced that there is really 600dpi there, however, and as you suggest, the JPEG compression means that there are artefacts. You may get just as good output scanning at 300dpi or even less with the given constraints.

I see that the usual issue of "+" appearing as a circle still arises, and I guess that this is just a general problem with Acorn's diagrams. So more resolution probably won't help deal with these fundamental problems. Still, even with these things, this is probably a better version of the diagram than any other I've seen.

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1024MAK
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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby 1024MAK » Thu Jul 27, 2017 2:38 pm

paulb wrote:I see that the usual issue of "+" appearing as a circle still arises, and I guess that this is just a general problem with Acorn's diagrams. So more resolution probably won't help deal with these fundamental problems.

Yeah, some of the other characters and symbols also suffer, like the 'K's for example. As said, the problem is the source material.


Yes, very much so, however some of the originals are in much better nick, like this one, and it turns out pretty much flawlessly.

102,000-C Circuit Diagram for the Atom Microcomputer.jpg


I did decide to keep scanning in this format, the scans are picking up all the imperfections in the photocopied originals, without adding anymore of their own :)

The scan looks fine to me. Although a lossless compression format would have been better, a high quality, high resolution JPEG image like this is fine :D


The res of the scans works out to be about 60 Megapixels, which is a lot more than my swanky camera. Unfortunately lossless compression was not an option on this network connected scanner :(
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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby flibble » Thu Jul 27, 2017 3:23 pm

Unfortunately due to a quirk of this moderator not knowing what button he was clicking I managed to overwrite 1024MAK's reply with my own ... :oops:

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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby 1024MAK » Thu Jul 27, 2017 4:10 pm

:lol: :lol: :lol:

Mark
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Elminster
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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby Elminster » Thu Jul 27, 2017 4:53 pm

Who moderates the moderators? Why the moderators moderate the moderators! Although some of the moderation is accidental moderation. =D>

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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby 1024MAK » Thu Jul 27, 2017 5:58 pm

Elminster wrote:Who moderates the moderators? Why the moderators moderate the moderators! Although some of the moderation is accidental moderation. =D>

The administrators moderate the moderators!

It is rather too easy, to hit the wrong on screen 'button' and only later realise that you have dropped a clanger :shock: #-o
Here's a challenge. I had to recreate a thread that I accidentally deleted from the cache from my browser :oops: . See if you can find it...

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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby Arcadian » Thu Jul 27, 2017 9:01 pm

Peter, it may be too late now, but you could borrow my nice Epson GT-15000 USB scanner? I could potentially drop it off with your bro in Leicester over the next couple of days, before I go away for the rest of July/August. LMK!
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flibble
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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby flibble » Thu Jul 27, 2017 9:14 pm

Arcadian wrote:Peter, it may be too late now, but you could borrow my nice Epson GT-15000 USB scanner? I could potentially drop it off with your bro in Leicester over the next couple of days, before I go away for the rest of July/August. LMK!


Thanks for the offer, but I finished them off today.

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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby NilByMouth » Fri Nov 24, 2017 12:35 pm

Data Recorder Things

ANF03 Schematic Diagram
ANF03 Wiring Diagram
ANF03 Component Layout (Bottom view)
ANF03 Component Layout (Top view)


I'm interested in these if you still have them?

Thanks,
Malc

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flibble
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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby flibble » Sun Nov 26, 2017 1:30 am

NilByMouth wrote:
Data Recorder Things

ANF03 Schematic Diagram
ANF03 Wiring Diagram
ANF03 Component Layout (Bottom view)
ANF03 Component Layout (Top view)


I'm interested in these if you still have them?


Hi Malc, these weren't in the a3 diagrams that I'd already uploaded, but are part of a larger folder of docs that I've yet to tidy up enough to upload.

But to tide you over in the meantime, here are the 4 pages about the data recorder.


datarec.pdf
(902.24 KiB) Downloaded 26 times

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NilByMouth
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Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

Postby NilByMouth » Sun Nov 26, 2017 10:34 am

But to tide you over in the meantime, here are the 4 pages about the data recorder.


datarec.pdf
(902.24 KiB) Downloaded 11 times


That's perfect! Thank you

Malc


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