
Search found 4201 matches
- Sun Feb 21, 2021 9:45 pm
- Forum: development tools
- Topic: Eprom programmers
- Replies: 4
- Views: 180
Re: Eprom programmers
I am still very satisfied with my TL866II Plus programmer. I suggest you don't buy a Genius G540 (clone) since the software does not work correctly. At least, that's my experience with that programmer and that's why it learned to fly 

- Sun Feb 21, 2021 10:47 am
- Forum: for sale / freebies
- Topic: For sale: Electron Turbo boards
- Replies: 4
- Views: 283
Re: For sale: Electron Turbo boards
I have a few spare boards for the Electron Turbo that I am selling. Bare board: €3,00 Kit: €9,00 (board, 2x20p header, 1x40p socket, all smd components, no switch, cpld not programmed) Build board and tested (also without switch): €29,00 Install in Electron: + €20,00 P&P to UK: €9,00 (in envelo...
- Sun Feb 21, 2021 10:38 am
- Forum: for sale / freebies
- Topic: For sale: Electron Turbo boards
- Replies: 4
- Views: 283
Re: For sale: Electron Turbo boards
I have a few spare boards for the Electron Turbo that I am selling. Bare board: €3,00 Kit: €11.25 (board, 2x20p header, 1x40p socket, all smd components, cpld not programmed) Build board and tested: €32,00 Install in Electron: + €20,00 P&P to UK: €8,00 (in envelope, no insurance, no track&t...
- Fri Feb 19, 2021 6:10 pm
- Forum: other events + general event chat
- Topic: Interview With Paul Fellows of Acornsoft - Airing 20th February 2021
- Replies: 5
- Views: 180
Re: Interview With Paul Fellows of Acornsoft - Airing 20th February 2021
Will this interview be recorded? I am not sure if I can make at that time... 

- Tue Feb 16, 2021 9:14 pm
- Forum: introduce yourself
- Topic: BBC's for ever!
- Replies: 8
- Views: 261
Re: BBC's for ever!
Hello Tedd,
Welcome to this forum. Enjoy your visits here.
Greetings from the south of the Netherlands,
Roland
Welcome to this forum. Enjoy your visits here.
Greetings from the south of the Netherlands,
Roland
- Sun Feb 14, 2021 10:36 pm
- Forum: 8-bit acorn hardware
- Topic: BBC + Master online (fork from ElkWiFi)
- Replies: 13
- Views: 762
Re: BBC + Master online (fork from ElkWiFi)
I know that the 1MHz bus can download data into RAM ( Hoglets Mandelbrot demo does it) but you can't run a complete sideway ROM on that bus. In theory you can copy the contents to sideway RAM but what if there is no sideway RAM?
- Sun Feb 14, 2021 4:22 pm
- Forum: 8-bit acorn hardware
- Topic: BBC + Master online (fork from ElkWiFi)
- Replies: 13
- Views: 762
Re: BBC + Master online (fork from ElkWiFi)
I'd like to see the transmission speed a little bit higher, like 115,200 baud. So I started drawing a new diagram that connects a WiFi board to the 1MHz bus. It will have the same options as the Electron version except that it doesn't have a ROM. The ROM should be installed in a socket of the Beeb. ...
- Sat Feb 13, 2021 11:04 pm
- Forum: for sale / freebies
- Topic: For sale: Acorn Electron WiFi cartridges
- Replies: 62
- Views: 4303
Re: For sale: Acorn Electron WiFi cartridges
To keep this topic for sales only, I replied in viewtopic.php?p=308365#p308365
- Sat Feb 13, 2021 11:03 pm
- Forum: 8-bit acorn hardware
- Topic: BBC + Master online (fork from ElkWiFi)
- Replies: 13
- Views: 762
Re: BBC + Master online (fork from ElkWiFi)
Responding to this post from Tom Seddon : There is no progress at the moment on this board. In this topic here there is a slight preference for the WiFi adapter at the 1 MHz bus. It involves however two issues: The 1 MHz bus has no internal power connector, how can the board be powered? There is no ...
- Sat Feb 13, 2021 10:52 pm
- Forum: 8-bit acorn hardware
- Topic: Acorn Electron online? Any such hardware.
- Replies: 188
- Views: 13660
Re: Acorn Electron online? Any such hardware.
I think that it is not relevant for most owners of a WiFi board because they have the module soldered to the board :mrgreen: I can try if the over-the-air update works in the current firmware.... The reason that I solder the modules on the board it that it won't fit in a Plus-1 slot when you use a s...
- Sat Feb 13, 2021 12:40 pm
- Forum: acorn atom and acorn system series
- Topic: Splitting the Atom - Hardware wise
- Replies: 5
- Views: 214
Re: Splitting the Atom - Hardware wise
That's correct but the redesigned Atoms are different from the Atom-in-PC that I build in 1993.
- Fri Feb 12, 2021 2:40 pm
- Forum: 8-bit acorn hardware
- Topic: Forty years ago...
- Replies: 73
- Views: 2110
Re: Forty years ago...
I was 13 at that time and I had never seen a computer in real life. I only knew about computers from a popular scientific magazine "Kijk" (Look) that every month dedicated a page or two to computers like ZX81 and the progress of Apple Lisa and Sinclair QL. I can't remember if they ever wro...
- Fri Feb 12, 2021 2:25 pm
- Forum: general
- Topic: Today I received.....
- Replies: 6126
- Views: 698285
Re: Today I received.....
My Pi Pico
- Fri Feb 12, 2021 10:35 am
- Forum: acorn atom and acorn system series
- Topic: Splitting the Atom - Hardware wise
- Replies: 5
- Views: 214
Re: Splitting the Atom - Hardware wise
Although this is intended for use by the cassette interface, I do wonder if any software makes use of it for timing, delays, or random numbers? I don't think it's (widely) used for timing and delays. BITD I had this Atom-in-PC card and it didn't have the 2400Hz signal, but it had an emulated 60Hz s...
- Fri Feb 12, 2021 10:08 am
- Forum: for sale / freebies
- Topic: For sale: Acorn Electron WiFi cartridges
- Replies: 62
- Views: 4303
- Fri Feb 12, 2021 10:07 am
- Forum: for sale / freebies
- Topic: For sale: Acorn Electron WiFi cartridges
- Replies: 62
- Views: 4303
Re: For sale: Acorn Electron WiFi cartridges
My cartridge arrived today and it’s amazing ! Installed and worked and downloading games. Has anyone worked out if it can be used to integrate with something to send a tweet ? Also, has any progress been made on a case for the board? I'm glad it arrived and that it works in your Electron. Actually,...
- Fri Feb 12, 2021 10:00 am
- Forum: acorn atom and acorn system series
- Topic: Splitting the Atom - Hardware wise
- Replies: 5
- Views: 214
Re: Splitting the Atom - Hardware wise
It divides the system clock (already divided by 16 in IC 44) to the 2400Hz clock signal for the cassette interface. We have VHDL equivalent sources for that circuit. It's nothing more than a clock divider.
- Fri Feb 12, 2021 9:54 am
- Forum: 8-bit acorn hardware
- Topic: Acorn Electron online? Any such hardware.
- Replies: 188
- Views: 13660
- Fri Feb 12, 2021 8:38 am
- Forum: 8-bit acorn hardware
- Topic: Acorn Electron online? Any such hardware.
- Replies: 188
- Views: 13660
Re: Acorn Electron online? Any such hardware.
I was tempted to upgrade it to the latest firmware but I don't have a spare without ripping another computer open, so I hesitated. I will probably overcome the hesitancy tomorrow sometime unless you can talk me out of it :D OK, here is my attempt to talk this plan out of you: don't do it :!: Re-fla...
- Thu Feb 11, 2021 10:08 am
- Forum: 8-bit acorn hardware
- Topic: RPi (zero) backpowering via gpio
- Replies: 9
- Views: 276
Re: RPi (zero) backpowering via gpio
In the Atom2k18 I power the Pi Zero through the gpio connector. I added a jumper to disconnect it. Any device connected to the Pi USB is powered by the Atom. So far no problems as I don’t power the Pi via USB. But when I do power through USB I think it won’t be a problem in this specific situation.
- Thu Feb 11, 2021 9:01 am
- Forum: 8-bit acorn hardware
- Topic: Acorn Electron online? Any such hardware.
- Replies: 188
- Views: 13660
Re: Acorn Electron online? Any such hardware.
I wasn't able to get the escape key to stop the PRD command. Only break, or waiting till it hit the end seemed stop the dump. That said, I haven't tried again since fixing my soldering on the ram chip. Never heard of this issue. If the problem persists, what is your exact configuration (other hardw...
- Wed Feb 10, 2021 2:35 pm
- Forum: acorn atom and acorn system series
- Topic: Atom emulator for the Atom on a Raspberry Pi
- Replies: 5
- Views: 160
Re: Atom emulator for the Atom on a Raspberry Pi
That is great news, I never got any response from them after asking about the boards.
- Wed Feb 10, 2021 1:42 pm
- Forum: acorn atom and acorn system series
- Topic: Atom emulator for the Atom on a Raspberry Pi
- Replies: 5
- Views: 160
Re: Atom emulator for the Atom on a Raspberry Pi
Off topic, but not completely: There are also two other familiar item (back) on Ebay: https://www.ebay.com/itm/FPGA-Atom-2k18-Pcb-X1/184655981212 https://www.ebay.com/itm/Fpga-Atom-2k15-Pcb-x1-6847-Adapter-Pcb-x1/184656000470 This time the seller has listed them with my permission under my condition...
- Wed Feb 10, 2021 8:07 am
- Forum: 8-bit acorn hardware
- Topic: Acorn Electron online? Any such hardware.
- Replies: 188
- Views: 13660
Re: Acorn Electron online? Any such hardware.
Yes, the CPLD files are on Github. It might be possible that I already programmed the EEPROM.
- Sat Feb 06, 2021 10:27 pm
- Forum: past all-day virtual ABugs
- Topic: All-day 'Virtual' Acorn session #11, Saturday 6th February 2021, 9am - 11pm
- Replies: 54
- Views: 1758
Re: All-day 'Virtual' Acorn session #11, Saturday 6th February 2021, 9am - 11pm
I don't want to disturb the current recording but I'm off to bed. Thanks to all the presenters, organizers and hosts for another amazing ABUG meeting with quite a lot of interesting subjects.
- Sat Feb 06, 2021 8:31 pm
- Forum: 8-bit acorn hardware
- Topic: Acorn Electron online? Any such hardware.
- Replies: 188
- Views: 13660
Re: Acorn Electron online? Any such hardware.
I tried your menu and it works fine. Do you also have programming languages like Pascal?
- Sat Feb 06, 2021 7:28 pm
- Forum: introduce yourself
- Topic: Short term lurker sending greeting from Cologne
- Replies: 8
- Views: 272
Re: Short term lurker sending greeting from Cologne
Welcome to this forum. Enjoy your visits here.
Greetings from the South of the Netherlands (about 40km from Aachen),
Roland
Greetings from the South of the Netherlands (about 40km from Aachen),
Roland
- Sat Feb 06, 2021 7:21 pm
- Forum: introduce yourself
- Topic: My Beeb projects
- Replies: 7
- Views: 289
Re: My Beeb projects
Welcome to this forum. Enjoy your visits here and please share the progress of your projects.
Greetings from the South of the Netherlands,
Roland
Greetings from the South of the Netherlands,
Roland
- Fri Feb 05, 2021 11:22 pm
- Forum: acorn atom and acorn system series
- Topic: Interfacing an Atom to a Raspberry Pi Pico
- Replies: 16
- Views: 562
Re: Interfacing an Atom to a Raspberry Pi Pico
That's why he uses a level converter (line between first and second picture)
- Fri Feb 05, 2021 11:20 pm
- Forum: 8-bit acorn hardware
- Topic: "Minus One" - 3 x cartridge Electron expansion
- Replies: 99
- Views: 7868
Re: "Minus One" - 3 x cartridge Electron expansion
The CPLD supplies a 3.3v signal to the programmer so if the light is off or red that means the signal is missing. Is this correct? Which pin is it on a XC9536 or XC9572? I always connect the Vref pin directly to 3.3V as I am not aware about a "Vref" pin on the CPLD (but I only now Xilinx ...