Search found 38 matches

by eXne
Sun Mar 22, 2020 2:39 pm
Forum: acorn atom and acorn system series
Topic: My old Atom for you to see
Replies: 10
Views: 917

Re: My old Atom for you to see

The Yarbb is designed and manufactured by Roland.
See: viewtopic.php?f=44&t=18020&start=60#p255834

Cheers,

Etienne
by eXne
Sat Feb 15, 2020 5:56 pm
Forum: general
Topic: Where is everyone? An information gathering topic
Replies: 131
Views: 42979

Re: Where is everyone? An information gathering topic

Added my pin.

Cheers, Etienne
by eXne
Sat Feb 15, 2020 5:05 pm
Forum: off-topic
Topic: Which soldering iron?
Replies: 22
Views: 1448

Re: Which soldering iron?

I’m still very happy with my Weller WECP from 1983.
50W of power, temperature controlled, and a fair amount of tips and it keeps going.
by eXne
Wed Feb 12, 2020 2:18 pm
Forum: acorn atom and acorn system series
Topic: Yarrb - redesigned
Replies: 210
Views: 8309

Re: Yarrb - redesigned

My Yarrb board arrived today.
Had to be quick as my cat thought ic u4, ST39SF01A, was something to play with..
Weekend project coming up, thx Roland
by eXne
Thu Jan 02, 2020 7:28 pm
Forum: 8-bit acorn hardware
Topic: PLCC Chip Extractor
Replies: 9
Views: 714

Re: PLCC Chip Extractor

I still use a PLCC extractor which dates back to the nineties.
It still does a nice job even after extracting so many PLCC chips.
I can’t recall how much it cost but as always: good tools are half the work.
by eXne
Thu Jan 02, 2020 7:03 pm
Forum: 8-bit acorn hardware
Topic: Teletext Adapter Service Manual
Replies: 18
Views: 1023

Re: Teletext Adapter Service Manual

A bit off topic: GoSDC has a new software version: v1.08 19 May 2019
by eXne
Sun Nov 10, 2019 5:24 pm
Forum: 8-bit acorn hardware
Topic: ROM Burner/Programmer
Replies: 7
Views: 656

Re: ROM Burner/Programmer

Yep still have my own build eprom programmer as well.
The userport is really versatile :D
Still works with all the old eproms :D
by eXne
Sun Nov 10, 2019 2:15 pm
Forum: 8-bit acorn hardware
Topic: ROM Burner/Programmer
Replies: 7
Views: 656

Re: ROM Burner/Programmer

I use this Epromprogrammer as well sofar I'm happy.
You have a look at Aliexpress, will safe you a bit, but longer leadtime.

The thing I'm puzzeling on is how to read the original Acorn proms ie HN613128.
by eXne
Sun Nov 10, 2019 1:45 pm
Forum: 8-bit acorn hardware
Topic: BBC-B iss.4 PSU odd capacitors
Replies: 1
Views: 218

BBC-B iss.4 PSU odd capacitors

Folks, at the moment I'm working on a BBC-C iss. 4. First point of attention is of course the PSU caps. This is where I was a bit puzzeled as the PSU is different from the ones I normaly have. Acorn BBC PSU Iss 4 marked.jpg C1,C2 and C9 are marked. Normally you expect the yellowish square ones but n...
by eXne
Sun Nov 10, 2019 9:24 am
Forum: acorn atom and acorn system series
Topic: Yarrb - redesigned
Replies: 210
Views: 8309

Re: Yarrb - redesigned

Folks, fine pitch smd components soldering is done either with hot air but applying solder on the pads is a tricky one. Normally a stencil is used as applying the solding by hand is difficult. The other way is ensuring all solderpads are clean and even. Next align the smd component and fix it by sol...
by eXne
Sat Oct 12, 2019 4:49 pm
Forum: acorn atom and acorn system series
Topic: Yarrb - redesigned
Replies: 210
Views: 8309

Re: Yarrb - redesigned

Add me to the list aswell.
Smd soldering was a while agoo but I’m capable :D
Might go to an old friend to get a miniwave smd tip :D
by eXne
Sat Oct 12, 2019 4:34 pm
Forum: acorn atom and acorn system series
Topic: A Website dedicated to the Acorn System Computers
Replies: 42
Views: 2946

Re: A Website dedicated to the Acorn System Computers

I wasn’t aware that Acorn was into 19” rack cards. Looks very nice.
It takes me back to my VME 19” boards time :D
by eXne
Sat Sep 21, 2019 4:35 pm
Forum: acorn atom and acorn system series
Topic: just got two Atom's
Replies: 6
Views: 538

Re: just got two Atom's

Hi Paul, sorry for being a bit unclear, Yes I was refering to a Atom DiscPack. I've already sorted it out. The drive needs a +12Vdc and a +5Vdc. The groundwire was broken loose. It was a bit messy so I've jumped to conclusions to soon, my bad :oops: But thanks for reaching out. And yes I'm picking u...
by eXne
Fri Sep 20, 2019 9:29 pm
Forum: acorn atom and acorn system series
Topic: Acorn Atom's Value ?
Replies: 9
Views: 959

Re: Acorn Atom's Value ?

@Beebman: you shouldn't worry much longer :D

Cheers,
Etienne
by eXne
Fri Sep 20, 2019 9:03 pm
Forum: acorn atom and acorn system series
Topic: just got two Atom's
Replies: 6
Views: 538

Re: just got two Atom's

And the Prophet system. Not sure if it is a true Prophet version as the return key is normal without being larger. A couple of sockets are precission ones an indication of a Prophet version. System memory has been increased and also the video memory. The 5 1/4 FDD has a default powerconnector with o...
by eXne
Fri Sep 20, 2019 8:57 pm
Forum: acorn atom and acorn system series
Topic: just got two Atom's
Replies: 6
Views: 538

Re: just got two Atom's

the first Atom was brought back to basic with the help of Multiwizard. The original powersupply has been bypassed. The thing I need to figure out is video. I simply connected the composite video signal from JP4 to a scartplug which connects to my LCD monitor. I only have the Atom prompt if I tilt th...
by eXne
Fri Sep 20, 2019 8:52 pm
Forum: acorn atom and acorn system series
Topic: just got two Atom's
Replies: 6
Views: 538

just got two Atom's

Folks, after many years I finally succeeded in aquiring two Atom's incl. a 5 1/4 FDD. As I'm a newbie to Atom's I had quite a discussion with Multiwizard who kindly took the time helping exploring my Atom's. I had an Atom with green text on the back, a Atom with red text on the back, red shift keys ...
by eXne
Mon May 13, 2019 8:53 pm
Forum: 8-bit acorn hardware
Topic: Help Needed with 6502 Second Processor
Replies: 18
Views: 1202

Re: Help Needed with 6502 Second Processor

Dave,

As you’ve spotted a damage wire you might strip the wire around the damage and solder a wire as a bypass.
This way you can easily check if this is the only fault.
You need to be careful and a bit handy with soldering.

Etienne
by eXne
Mon May 13, 2019 8:21 pm
Forum: 8-bit acorn hardware
Topic: ELITE Combat Dashboard
Replies: 4
Views: 896

Re: ELITE Combat Dashboard

Very nice project, thank you
by eXne
Mon Jan 14, 2019 7:37 pm
Forum: 8-bit acorn hardware
Topic: fading characters
Replies: 2
Views: 423

Re: fading characters

I need to dig into that part.
I have my beeb hooked through the RGB port to a TV Scart input.
by eXne
Sun Jan 13, 2019 8:36 pm
Forum: 8-bit acorn hardware
Topic: fading characters
Replies: 2
Views: 423

fading characters

Folks,recently I purchased a BBC from the UK and started the normal process by first checking the PSU caps which needed to be replaced. When I turned the Beeb on I was puzzled as I saw fading characters. Pic-20190113-001.jpg After browsing the forum and google I found nothing similar, or I entered t...
by eXne
Sun Apr 15, 2018 3:54 pm
Forum: 8-bit acorn hardware
Topic: Scope recommendations
Replies: 17
Views: 1739

Re: Scope recommendations

I use the Siglent SDS1102X, 100MHz, dual channel scope.
As an option I have decoding I2C, SPI, UART's.
Also it offers a 16bit MSO, which is a 16bit logic analyser as an option.
by eXne
Sun Apr 15, 2018 10:05 am
Forum: 8-bit acorn hardware
Topic: Soldering and Hotair station options
Replies: 38
Views: 3197

Re: Soldering and Hotair station options

I use either Weller or Pace smd rework stations for many years now and I’m still happy. Maybe a bit higher priced but it is worth it. I started with the 1206 components and QFP opackages but the increase number of pins and decrease of pin space are going fast. So you really need the proper soldering...
by eXne
Mon Oct 30, 2017 6:44 pm
Forum: 8-bit acorn hardware
Topic: EPROM Programmer collectors roll call
Replies: 52
Views: 9223

Re: EPROM Programmer collectors roll call

I’ve build my own Epromprogrammer.
It’s attached the userport.

Etienne
by eXne
Mon Oct 23, 2017 5:04 pm
Forum: 8-bit acorn hardware
Topic: 6502 second processor poll
Replies: 40
Views: 3718

Re: 6502 second processor poll

Got both an original 6502 2nd proc and the copro
by eXne
Thu May 25, 2017 5:36 pm
Forum: 8-bit acorn hardware
Topic: 6809 experiments
Replies: 137
Views: 13737

Re: 6809 experiments

I probably have a couple of 6809 CPU laying around which I can donate
by eXne
Thu May 25, 2017 4:56 pm
Forum: 8-bit acorn hardware
Topic: Possibly Unscanned Acorn Circuit Diagrams - Need Help!
Replies: 18
Views: 2820

Re: Possibly Unscanned Acorn Circuit Diagrams - Need Help!

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
by eXne
Fri Dec 23, 2016 10:36 am
Forum: 8-bit acorn hardware
Topic: Pcb board making
Replies: 30
Views: 4294

Re: Pcb board making

or http://www.digikey.com/schemeit/project/
a pcb design is also possible.
by eXne
Fri Dec 23, 2016 10:35 am
Forum: 8-bit acorn hardware
Topic: Pcb board making
Replies: 30
Views: 4294

Re: Pcb board making

by eXne
Sun Nov 20, 2016 12:55 pm
Forum: 8-bit acorn hardware
Topic: datasheet Philips X3114 FDD
Replies: 0
Views: 405

datasheet Philips X3114 FDD

Folks,

wondering if somebody might have a datasheet for this Philips FDD.
I've a shortage in the 12V circuit and this will help me finding the faulty component.

And yes google didn't turned up anything as the drive is from the eighties :D

Thanks,

Etienne

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