Today I received.....

on-topic acorn-related discussions not covered by the other forums
philpem
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Re: Today I received.....

Post by philpem » Sat Jul 18, 2020 7:47 pm

Kazzie wrote:
Sat Jul 18, 2020 7:21 pm
We seem to be crossing paths quite a bit at the moment. I've just ordered some VRAM chips following your successful build (and parts link), and I've also spent this past week considering getting some of those EF68B54s to make a batch of econet modules, having baulked at the current going price for modules!
Interesting! I had the same idea. Have you got a PCB design for an Econet module?

I was going to design a Podule and a module.
As the 26LS30 is obsolete, I was planning to "borrow" the line driver circuitry Myelin designed for his "Econet from scratch" project, and use the old Acorn opamp line receiver.

Agreed that the going rate for the modules is getting a bit silly, long gone are the days of £10 Econet modules it seems...

Cheers
Phil.

Kazzie
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Re: Today I received.....

Post by Kazzie » Sat Jul 18, 2020 9:26 pm

philpem wrote:
Sat Jul 18, 2020 7:47 pm
Kazzie wrote:
Sat Jul 18, 2020 7:21 pm
We seem to be crossing paths quite a bit at the moment. I've just ordered some VRAM chips following your successful build (and parts link), and I've also spent this past week considering getting some of those EF68B54s to make a batch of econet modules, having baulked at the current going price for modules!
Interesting! I had the same idea. Have you got a PCB design for an Econet module?

I was going to design a Podule and a module.
As the 26LS30 is obsolete, I was planning to "borrow" the line driver circuitry Myelin designed for his "Econet from scratch" project, and use the old Acorn opamp line receiver.

Agreed that the going rate for the modules is getting a bit silly, long gone are the days of £10 Econet modules it seems...

Cheers
Phil.
I was planning to straight-up duplicate the later A3020-style module (AEH52) that I have on my desk: the schematics are part of the A3010/A4000 technical drawings, and I've got it mostly transcribed into KiCad. I was going to use the 26LS30, because it's no more obsolete than the 68B54, and it's still available online in SOIC and DIL packages.
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IanS
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Re: Today I received.....

Post by IanS » Sat Jul 18, 2020 10:50 pm

Kazzie wrote:
Sat Jul 18, 2020 7:21 pm
philpem wrote:
Sat Jul 18, 2020 2:49 am
Received tonight - RISC PC motherboard (see repair thread), and also...

Sixteen EF68B54P ADLCs and ten Hitachi HM538253BTT-7 VRAMs.
We seem to be crossing paths quite a bit at the moment. I've just ordered some VRAM chips following your successful build (and parts link), and I've also spent this past week considering getting some of those EF68B54s to make a batch of econet modules, having baulked at the current going price for modules!
I made a small batch (10) for my own use a few years back.
IMG_20200718_222926.jpg
There are a suprising number of components on it and they are a bit tedious to make. I'd look at going surface mount and even look at getting them assembled (excloding connectors and ADLC if I did it again.
I used half of a 75LBC176 for the line driver, but used the usual op-amp circuit for the receivers.

I also did a podule, which could fit discrete components for an econet module, or actual modules. I fitted a GAL at the time as I wasn't quite sure what I was doing at the time, but I'd replace it with a couple of HC139's to do the decoding now.
viewtopic.php?p=189894#p189894

philpem
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Re: Today I received.....

Post by philpem » Sun Jul 19, 2020 1:40 am

Kazzie wrote:
Sat Jul 18, 2020 9:26 pm
I was planning to straight-up duplicate the later A3020-style module (AEH52) that I have on my desk: the schematics are part of the A3010/A4000 technical drawings, and I've got it mostly transcribed into KiCad. I was going to use the 26LS30, because it's no more obsolete than the 68B54, and it's still available online in SOIC and DIL packages.
I think that's the one I was using as a base too. I was looking at replacing the 26LS30 as it has a bit of a reputation for being a bit failure-prone. Modern line drivers have internal ESD protection, which might make them a bit more hardy.

I'm also planning to use SMD components wherever practical.

(And I still need to do the LS123/HC123 bench test...)

Cheers.
Phil

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Re: Today I received.....

Post by Remklep » Mon Jul 20, 2020 8:44 pm

IMG_6784.JPG
... A very nice set of ring-bound Master books and a Gotek drive with cables from fellow member Andy (LordVaderUK).

Thanks again Andy!
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Re: Today I received.....

Post by Coeus » Wed Jul 22, 2020 5:40 pm

Coeus wrote:
Thu Jul 09, 2020 4:32 pm
One option seems to be Soarer's converter (eBay link).
So I ordered one of those:
screenshot.png
and it turned up today. So far, so good. The information on this on the net describes this as a project for enthusiasts based around a microcontroller/board called the teensy, but this looks like a commercial product. The USB A plug looks a bit thick compared to many other devices so presumably the microcontroller is hidden in there. I have not yet investigated the remapping and macro capabilities of the converter - I will wait to see what seems necessary. It identifies on USB as:

Bus 003 Device 031: ID 16c0:047d Van Ooijen Technische Informatica Teensy Keyboard+Debug

tingo
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Re: Today I received.....

Post by tingo » Wed Jul 22, 2020 6:52 pm

Some info on Soarer's converter here https://gist.github.com/jasonm23/8be41b ... 4d38468ebb
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myelin
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Re: Today I received.....

Post by myelin » Wed Jul 22, 2020 10:59 pm

philpem wrote:
Sat Jul 18, 2020 7:47 pm
Interesting! I had the same idea. Have you got a PCB design for an Econet module?

I was going to design a Podule and a module.
As the 26LS30 is obsolete, I was planning to "borrow" the line driver circuitry Myelin designed for his "Econet from scratch" project, and use the old Acorn opamp line receiver.
Please do... that whole project is under the Apache 2.0 license, which isn't very restrictive, so you're welcome to do more substantial copying if you like :)

I was just looking at that project again a couple of weeks back, actually; I sketched up a design for an FPGA based version of it, as I'm trying to move away from the XC9500XL chips (they're so convenient with their 5V tolerance, but rather limiting compared to what you can do with an FPGA). That's only if you feel like implementing the 68B54 in Verilog though...
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Most interesting: Arcflash, FX2+PiTubeDirect Tube/Cartridge adapter, USB cart interface.

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myelin
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Re: Today I received.....

Post by myelin » Thu Jul 23, 2020 2:36 am

Arcflash v3 and POST box v2 boards (pictured against their earlier versions)...

70015F7C-DA80-4D83-B10C-64BB0328894E.jpeg
SW/EE from New Zealand, now in Mountain View, CA, making BBC/Electron hardware projects for fun.
Most interesting: Arcflash, FX2+PiTubeDirect Tube/Cartridge adapter, USB cart interface.

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1024MAK
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Re: Today I received.....

Post by 1024MAK » Sat Jul 25, 2020 8:31 pm

D1FD0EC1-99FA-47A2-83E9-3EC8D05E1875.jpeg
Front
05707091-3976-4B99-BFBC-1759526684BC.jpeg
Bottom
I’m saying nothing other than look at the date received (which is today), the date on the label, and the date collected from BeebMaster (7th July)...

Mark

Kazzie
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Re: Today I received.....

Post by Kazzie » Sat Jul 25, 2020 9:24 pm

1024MAK wrote:
Sat Jul 25, 2020 8:31 pm
I’m saying nothing other than look at the date received (which is today), the date on the label, and the date collected from BeebMaster (7th July)...
Er, that'd be the 10th of July (or the 7th of October to some)? Not that it's much better...


(Or am I misunderstanding, and the date on the label is not the date of collection?)
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1024MAK
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Re: Today I received.....

Post by 1024MAK » Sat Jul 25, 2020 10:53 pm

Kazzie wrote:
Sat Jul 25, 2020 9:24 pm
1024MAK wrote:
Sat Jul 25, 2020 8:31 pm
I’m saying nothing other than look at the date received (which is today), the date on the label, and the date collected from BeebMaster (7th July)...
Er, that'd be the 10th of July (or the 7th of October to some)? Not that it's much better...


(Or am I misunderstanding, and the date on the label is not the date of collection?)
Date of collection was 7th July 2020...

Neither BeebMaster or me knows where it got to... :roll:

The other items that he sent out did make it in a timely fashion, I think this one was in the same collection.

Mark

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KenLowe
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Re: Today I received.....

Post by KenLowe » Sat Jul 25, 2020 11:31 pm

What looks even odder is that there's a Hermes International label on the box. That's different to the Hermes labels I normally use. I wonder if it's gone via mainland Europe for some strange reason? It looks like there's another Hermes label underneath the International one. I wonder what that one says???

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Re: Today I received.....

Post by Kazzie » Sun Jul 26, 2020 6:06 am

KenLowe wrote:
Sat Jul 25, 2020 11:31 pm
What looks even odder is that there's a Hermes International label on the box. That's different to the Hermes labels I normally use. I wonder if it's gone via mainland Europe for some strange reason? It looks like there's another Hermes label underneath the International one. I wonder what that one says???
Perhaps it was sent out of the country by mistake, on the 10th they found it and put a fresh label on, and then ???? until it got back to the UK?
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1024MAK
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Re: Today I received.....

Post by 1024MAK » Sun Jul 26, 2020 8:46 pm

1024MAK wrote:
Sat Jul 25, 2020 8:31 pm
I’m saying nothing other than look at the date received (which is today), the date on the label, and the date collected from BeebMaster (7th July)...
So the photos above were as it was when it arrived.

Today I played the “peel off a label game”...

Under the top label was this one:
070D0322-2164-4963-91AA-7CEF203074E7.jpeg
Top-1 label
So even though a valid post town and a valid house number and road name were present, instead of my post code, it has BFPO (British Forces) hence presumably why it looks like it may have been to London...

And under that, BeebMaster’s original label:
ED212ACD-F122-4E9C-9A9E-D46F05A8FC48.jpeg
Original label
The first part of the post code is not as clear as it can be, but is still just about readable. I wonder if the crinkled clear tape caused an issue on the machine readable part (at least, that’s what I presume the rectangle is at the top left)?

Inside the package, most items were fine, but the OTP EPROM appears to have got loose and moved (it was at a funny angle on the edge of the black antistatic foam with one leg overhanging the edge of the foam), getting squished at some point, see photos:
EF3206C6-5027-45C1-BC24-BA2B8F7F7F37.jpeg
Bent and squished pins
42C191E0-19D4-4CA5-834B-49BB75166B0C.jpeg
Bent pins
Mark

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BeebMaster
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Re: Today I received.....

Post by BeebMaster » Sun Jul 26, 2020 10:02 pm

I blame the Russians! Clearly there's interference in our postal system as well as our electoral system (allegedlyski).
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flaxcottage
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Re: Today I received.....

Post by flaxcottage » Mon Aug 03, 2020 1:02 pm

A collection of special needs software and documentation.
.
SEN progs.jpg
.
This was from a really helpful eBay seller who had advertised this lot as a collect only auction. I contacted the seller and he agreed to post them to me if I made a negotiated, very reasonable offer on the gear. He was adamant that he did not want this stuff to go to landfill. He came to the right place! :lol:

There is a mass of software that was MIA from Widgit Software and Brilliant Computing as well as several discs of software programmed by what looks like a teacher. Not only that but there was also a working A3 concept keyboard complete with a lot of overlays and documentation for some Brilliant Computing titles too.

They are currently being put on the website. :D
- John

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IanS
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Re: Today I received.....

Post by IanS » Mon Aug 03, 2020 1:43 pm

Following on from here - viewtopic.php?f=16&t=8155&p=281176#p281087
V2 Econet podule boards. No programmable logic (GAL). Flash can (hopefully) be programmed in the RISC PC, so no external programmers needed.
Should keep me busy this evening building one up.
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IMG_20200803_125847_v2_s.jpg

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Lardo Boffin
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Re: Today I received.....

Post by Lardo Boffin » Mon Aug 03, 2020 2:11 pm

A working Oric 1 (no thanks to being badly packaged). It just gave me garbage on the screen the first time I plugged it in but after a few power cycles seems ok.

Do these suffer similar capacitor related problems to Spectrums? If so I will crack it open and recap it.

Also it is missing a foot. Any idea if someone sells a suitable one? Edit - turns out they have the same feet as the C64.

BD288DAC-BB04-4FDB-936D-4FFC6DF8DE13.jpeg
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A number of econetted (is that a word?) Beebs
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Lardo Boffin
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Re: Today I received.....

Post by Lardo Boffin » Tue Aug 04, 2020 11:32 am

A fairly early (I assume based on the PSU) issue 2 model B.

It switches on and boots to the 32K BBC BASIC prompt! (It was sold untested)

Do these type of PSU need servicing / caps replacing?
B9AB894D-A088-4369-B7D6-BF5313870545.jpeg
4F90A8A8-F750-4B2A-B06D-C2A044C6CFC4.jpeg

Lots of little patch wires going on and an old style PSU:
DF15A6B8-0D02-4E9F-95AE-6DBFF3BE8F3F.jpeg

No power out for disc drives etc.! Shame about the security marking.
FC74B691-077F-410E-94B0-7ACAF24672ED.jpeg
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BeebMaster
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Re: Today I received.....

Post by BeebMaster » Tue Aug 04, 2020 11:53 am

Ooo that's very nice. I wonder if it is actual BBC Micro number 834. Can we see it from the back? My issue 2 has the newer logo on the function key strip and smoother case, and standard PSU, so it's probably an old board in a newer case.

Probably been explored before, but do we know when the case went from rough to smooth? And when the PSU went from black to silver?

Looks like you'll be needing disc and Econet upgrades for it...
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danielj
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Re: Today I received.....

Post by danielj » Tue Aug 04, 2020 11:57 am

Lardo Boffin wrote:
Tue Aug 04, 2020 11:32 am

No power out for disc drives etc.! Shame about the security marking.
The security marking is cool though - you know that it was owned by someone living at 30 Lindsay Drive in Shepperton! It gives you some of the history of the machine :)

d.

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Lardo Boffin
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Re: Today I received.....

Post by Lardo Boffin » Tue Aug 04, 2020 12:10 pm

BeebMaster wrote:
Tue Aug 04, 2020 11:53 am
Ooo that's very nice. I wonder if it is actual BBC Micro number 834. Can we see it from the back? My issue 2 has the newer logo on the function key strip and smoother case, and standard PSU, so it's probably an old board in a newer case.

Probably been explored before, but do we know when the case went from rough to smooth? And when the PSU went from black to silver?

Looks like you'll be needing disc and Econet upgrades for it...
I was wondering if it was 834 of the issue two model release? Hard to tell with the way serial numbers changed.

Some photos of the back.
08502DDA-9FCA-4070-B8DF-478B956C474D.jpeg
C5E17E9C-63C0-40ED-BC80-FDC4C64C9A68.jpeg
8B44F6BD-BA6F-4E44-8120-DC5A4342A9E0.jpeg
Edit - not sure I will be upgrading this one. Would not forgive myself if I bodged the econet upgrade.
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roland
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Re: Today I received.....

Post by roland » Fri Aug 07, 2020 6:36 pm

I just picked up our dog Misty from her holiday address and I got some nice goodies:
Atom-in-PC prototype.jpg
I didn't know it still existed: one of the first Atom-in-PC prototype boards from March 1993.
SB-Boek.jpg
A Dutch Soundblaster book. Maybe with some interesting stuff for programming the OPL-2?
Electron.jpg
An fully operational and good looking Acorn Electron (German edition). All keys working perfect. I guess it has not been powered on 100 hours!
Tapes.jpg
A lot of software for this Electron. Games and languages.
But the cream of this gift is ....
Plus-1 boxed.jpg
A boxed Plus-1. It could probably go for £££££^3 on Ebay but I have no intention to sell it :mrgreen:
Plus-1 unpacked.jpg
And here it is unpacked. I think I cannot make any warranty claims when it fails .... warranty is UK only :-D
FPGAtom: 512 KB RAM, Real Time Clock and 64 colours
MAN WOMAN :shock:

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Re: Today I received.....

Post by derek » Wed Aug 12, 2020 8:26 pm

I rescued a Technomatic Disc Sharer from eBay, in a poor e ternal condition:
Techno1.jpg
Inside looks okay:
Techo2.jpg
Does any have documentation this this device?

I have a twin 3.5" disc drives that work with my ELK and BEEB, I hope this will share the drives between the two computers.
Regards,

Derek

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DutchAcorn
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Re: Today I received.....

Post by DutchAcorn » Wed Aug 12, 2020 9:26 pm

I have the same one. I don’t know if there were different configurations but mine has 4 sockets for computers, 2 of which are on a second pcb in the case.

Mine is quite temperamental, needs a bit of a wiggle and push to work.

Instructions are simple; connect computers and disc drive, the box is transparent to the computers, it is seen as a connected floppy drive.
Paul

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BeebMaster
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Re: Today I received.....

Post by BeebMaster » Wed Aug 12, 2020 10:01 pm

Makes the Watford Electronics one look like a deluxe version!

Image

Nice to see they kept the "safety knot"!
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steve3000
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Re: Today I received.....

Post by steve3000 » Thu Aug 13, 2020 8:32 pm

A HCCS Vision micropodule (thanks 8271!)
IMG_0912.jpg
HCCS Vision micropodule
Fits perfectly next to the HCCS SCSI micropodule... and just one space left now...
IMG_0911.jpg
HCCS A30x0/A4000 micropodule interface

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Re: Today I received.....

Post by Coeus » Fri Aug 14, 2020 10:58 am

BeebMaster wrote:
Wed Aug 12, 2020 10:01 pm
Nice to see they kept the "safety knot"!
I don't like that knot and I suspect it could fail if the cable were pulled repeatedly, i.e. the knot would move towards the end. But full marks for having the PSU in the box and a mains cable with a sensible-sized plug on the end.

I can understand why "wall-warts" are popular - it helps with localisation to different regions of the world and moves the whole problem of compliance of the PSU to the PSU manufacturer but I still don't like them. Unless it's 5V USB (a phone charger) they block other plugs or won't fit because a workstop or cupboard is too close and are rarely labelled with the piece of equipment they go with.

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Re: Today I received.....

Post by BeebMaster » Fri Aug 14, 2020 11:21 am

I don't like them either, especially the build-your-own PSU variety that you get with many products. Even my new Seagate had one of these where you clip the UK plug front onto the the adapter. It wouldn't take much to grip it incorrectly when unplugging and leave the front part in the socket and take the adapter away. Not sure how that can pass electrical safety standards.
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