Search found 2409 matches

by Elminster
Sat Jul 21, 2018 5:08 pm
Forum: general
Topic: Today I built ...
Replies: 26
Views: 2197

Re: Today I built ...

cmorley wrote:
Sat Jul 21, 2018 3:54 pm
Retro hardware is supposed to be fun!

Photo0649.jpg

That was hard work.
Doing 1or 2 is fun, after that it is a job :wink:
by Elminster
Sat Jul 21, 2018 3:48 pm
Forum: general
Topic: *TAPE baud rates
Replies: 12
Views: 137

Re: *TAPE baud rates

AndyF wrote:
Sat Jul 21, 2018 2:54 pm
Elminster wrote:
Sat Jul 21, 2018 1:17 pm
No I had a +2 with dual cumana 3.5 inch drive unit, never had a +3
Relatively rare and expensive 'back then' ! :)
Yep. I had snapshot interface and swiped my dad floppy drive when he move from a QL to a PC. I quite liked the microdrives at he time, but obvious were fairly niche.
by Elminster
Sat Jul 21, 2018 1:51 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 106
Views: 3380

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

You might be best off waiting for the freewifi module Daniel is doing in another thread. Then persuade him to build some!
by Elminster
Sat Jul 21, 2018 1:20 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 233
Views: 7892

Re: RGB to HDMI using a Pi Zero and a small CPLD

Is the vidnula on a Beeb or a master? Will try on master with nula later
by Elminster
Sat Jul 21, 2018 1:17 pm
Forum: general
Topic: *TAPE baud rates
Replies: 12
Views: 137

Re: *TAPE baud rates

No I had a +2 with dual cumana 3.5 inch drive unit, never had a +3
by Elminster
Sat Jul 21, 2018 11:08 am
Forum: general
Topic: Today I received.....
Replies: 4697
Views: 317046

Re: Today I received.....

Post us some modern examples. Be interesting to see what you get out of it.
by Elminster
Sat Jul 21, 2018 11:07 am
Forum: general
Topic: *TAPE baud rates
Replies: 12
Views: 137

Re: *TAPE baud rates

I always think I would have been a better programmer now if I had floppy instead of tape as a youth. Saving stuff was just a pain when writing code. I think my first floppy was on a spectrum +2 around 15 years young, my Electron not at all.
by Elminster
Sat Jul 21, 2018 9:35 am
Forum: off-topic
Topic: Using BBC BASIC to teach programming concepts in 2017
Replies: 87
Views: 2342

Re: Using BBC BASIC to teach programming concepts in 2017

Yeah, but you don't press the button again after the system has acknowledged your input (or do you?). But some people keep pressing the button until the traffic lights change. I noticed similar types of behaviour in other (wo)man/machine interfaces. I think people get bored and need something todo,...
by Elminster
Sat Jul 21, 2018 9:30 am
Forum: hardware
Topic: Electron overheating video
Replies: 29
Views: 480

Re: Electron overheating video

@Duncan . . . Everything should be well buffered, in respect of the Data lines etc. Which would only leave the power supply! I've carried out lots of tests, recently and BITD, however, there's still a chance you could have a faulty unit. Could you monitor the +5V line at the PSU connector to the ma...
by Elminster
Sat Jul 21, 2018 9:25 am
Forum: hardware
Topic: Electron overheating video
Replies: 29
Views: 480

Re: Electron overheating video

I had problem with my Elk when it 1st arrived doing similar things, I took the ula chip out and cleaned the connections on the chip and the socket connections and not had a problem since. I suspect it was from being stored for a long time. Already swapped ULA was the first thing tried. And this one...
by Elminster
Sat Jul 21, 2018 2:15 am
Forum: hardware
Topic: Electron overheating video
Replies: 29
Views: 480

Re: Electron overheating video

Some extra observations while sorting knackered eeprom in plus+1 Was mucky around with Electron for quite sometime and had no flickering issues, I put this down to the fact I was using simple text screens and the AP5 not plugged in etc. Therefore Electron drawing less current and not getting as hot....
by Elminster
Sat Jul 21, 2018 1:54 am
Forum: hardware
Topic: I2C 4 U
Replies: 172
Views: 12263

Re: I2C 4 U

As per other post, Electron back in the land of the living, so I hacked off the diode, seems to work. Still knew the time when I turned it back on. So I now eagerly await the RTCRAMagic solution.
by Elminster
Sat Jul 21, 2018 12:47 am
Forum: hardware
Topic: EUPURS and AP5 Cable(s)
Replies: 59
Views: 648

Re: EUPURS and AP5 Cable(s)

Odd not sure how I killed the EEPROM but it refuses to even erase in a Batronix programmer, dies consistantly at 91% erased.

It doesnt really need to be an eeprom any way so just programmed a normal 16K rom. Alive again.
by Elminster
Fri Jul 20, 2018 11:21 pm
Forum: hardware
Topic: 2nd User port for Beeb?
Replies: 98
Views: 6254

Re: 2nd User port for Beeb?

Thanks. Need to double check but i think I already have parts for all of these.

Edit: Think I need to give the original article a proper read.
by Elminster
Fri Jul 20, 2018 9:00 pm
Forum: hardware
Topic: EUPURS and AP5 Cable(s)
Replies: 59
Views: 648

Re: EUPURS and AP5 Cable(s)

Okay Electron sort of fixed. I soldered up the 2nd AP6 I got from Dave a couple of years ago and fitted in my Pres+1. (So now have fully loaded Acorn +1 with AP5, Pres+1 AP6 unpopulated except ROM, and an vanilla acorn +1). And boots fine. So assume somehting, probably EEPROM is stuffed in other Ele...
by Elminster
Fri Jul 20, 2018 7:44 pm
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 42
Views: 589

Re: BeebSCSI 7_7

That is okay I found a cheap seller of holes on eBay :wink:
by Elminster
Fri Jul 20, 2018 7:18 pm
Forum: projects
Topic: Viewdata Service
Replies: 68
Views: 2927

Re: Viewdata Service

I have used BeebEm in Wine on a Mac by setting the emulators Comm port to the IP/Port in the 'RS232 Destination Settings'. But Richard Russells BBC Basic example gets preference now. The only issue I have with the BBC Basic example client is that it is too fast and the 'Page not found' messages etc...
by Elminster
Fri Jul 20, 2018 7:12 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 233
Views: 7892

Re: RGB to HDMI using a Pi Zero and a small CPLD

My testing will have to wait as I don’t have the right cable yet, I did put on the reset header on the pi.

Edit: Hopefully order the right one this time, didnt notice was two versions, one for hdmi on mobile devices and one for RPI.
by Elminster
Fri Jul 20, 2018 6:57 pm
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 42
Views: 589

Re: BeebSCSI 7_7

Fiducials are alignment markers used for board production when using pick and place machines - it is not a 'component' that needs to be purchased; it's an optical marker on the PCB surface. https://en.wikipedia.org/wiki/Fiducial_marker#Printed_circuit_boards The board contains 3 such markers (F1, F...
by Elminster
Fri Jul 20, 2018 6:56 pm
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 42
Views: 589

Re: BeebSCSI 7_7

Could do. Half of them RC2014 boards. I then have 3 beebscsi and freewifi to build for acorns.

Edit: oh and working on the usb to electron header single cable thingy
by Elminster
Fri Jul 20, 2018 10:15 am
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 42
Views: 589

Re: BeebSCSI 7_7

Nearly finished putting together parts order list for v7.7. 2 questions, all to do with holes.

What do I need to order for:

Fiducials:Fiducial_0.5mm_Dia_1mm_Outer
by Elminster
Fri Jul 20, 2018 9:20 am
Forum: projects
Topic: Viewdata Service
Replies: 68
Views: 2927

Re: Viewdata Service

Well it could be a carrot that gets me to finish the btelnet program. Although what use to drive me nuts is that none of the emulators support the Sprow Ethernet card, so has to be tested on real hardware, and the program is to large to easily edit on real hardware, so continually copying them betwe...
by Elminster
Fri Jul 20, 2018 8:34 am
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 233
Views: 7892

Re: RGB to HDMI using a Pi Zero and a small CPLD

What would be required to get the RGBtoHDMI working with the VideoNULA? And with an Atom? I doubt working with the 4-bit RGB levels of VideoNuLa is technically possible. You would need: - three video DACs - a bigger CPLD - four times as much GPIO and Memory bandwidth It's the last part that is the ...
by Elminster
Fri Jul 20, 2018 8:29 am
Forum: projects
Topic: Viewdata Service
Replies: 68
Views: 2927

Re: Viewdata Service

Telnet Server. Hmmmm. I could then use the Master Telent Client on it.

viewtopic.php?f=53&t=13228&hilit=btelnet
by Elminster
Thu Jul 19, 2018 7:16 pm
Forum: general
Topic: "Outline specification for the BBC MICROCOMPUTER system"
Replies: 203
Views: 16237

Re: "Outline specification for the BBC MICROCOMPUTER system"

I think it is just simply that it was a published open standard, no lock in and no licensing. You wouldn’t get that from Nintendo for example. It wasn't a published open standard, it was just built in a hurry from off-the-shelf components. The BIOS was proprietary and copyrighted, and lawyers were ...
by Elminster
Thu Jul 19, 2018 1:21 pm
Forum: hardware
Topic: Fake 6502As
Replies: 4
Views: 179

Re: Fake 6502As



65c02 shouldn't be an issue as you can still buy them new (well unless you buy fake one from ebay), I dont suppose your project could use them instead? i.e. if it was a new project rather than fixing BBC B or Electron.
by Elminster
Thu Jul 19, 2018 1:16 pm
Forum: hardware
Topic: Model B paged ROM breakout board. Interest?
Replies: 43
Views: 2850

Re: Model B paged ROM breakout board. Interest?

Cost comes in around £15 (some bits I already have), with the ZIF sockets being nearly half the cost.

I still probably wont be building this till mid August but at least I have the parts list complete now.
by Elminster
Thu Jul 19, 2018 12:21 pm
Forum: hardware
Topic: FreeFi-232 v2
Replies: 71
Views: 1560

Re: FreeFi-232 v2

£1.60
by Elminster
Thu Jul 19, 2018 12:14 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 233
Views: 7892

Re: RGB to HDMI using a Pi Zero and a small CPLD

Mine arrived as well.

Edit: But mini HDMI arrives tomorrow.
by Elminster
Thu Jul 19, 2018 10:21 am
Forum: hardware
Topic: Model B paged ROM breakout board. Interest?
Replies: 43
Views: 2850

Re: Model B paged ROM breakout board. Interest?

Forgot to ask. For completenet. What do the 'Optional Bulk Capacitors' do? And if you did want to fit them what values would they be?