Search found 4201 matches

by roland
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 :mrgreen:
by roland
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...
by roland
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...
by roland
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... [-o<
by roland
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
by 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?
by roland
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. ...
by roland
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
by roland
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 ...
by roland
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...
by roland
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.
by roland
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...
by roland
Fri Feb 12, 2021 2:25 pm
Forum: general
Topic: Today I received.....
Replies: 6126
Views: 698285

Re: Today I received.....

My Pi Pico
Pi Pico next to AA battery, slightly larger.
Pi Pico next to AA battery, slightly larger.
by roland
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...
by roland
Fri Feb 12, 2021 10:08 am
Forum: for sale / freebies
Topic: For sale: Acorn Electron WiFi cartridges
Replies: 62
Views: 4303

Re: For sale: Acorn Electron WiFi cartridges

Dave_E wrote:
Thu Feb 11, 2021 11:46 pm
I'd like to have a go with one of these too. Also in UK. Let me know via PM or on my everygamegoing site. ;-)
I expect a box of components in the next couple of days and then I can finish a board for you. To be continued (by PM).
by roland
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,...
by roland
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.
by roland
Fri Feb 12, 2021 9:54 am
Forum: 8-bit acorn hardware
Topic: Acorn Electron online? Any such hardware.
Replies: 188
Views: 13660

Re: Acorn Electron online? Any such hardware.

scropp wrote:
Fri Feb 12, 2021 9:23 am
I am glad you didn't say that you were specifically using the old firmware to get around some compatibility issue.
AFAIK are all used AT-commands still valid in newer versions, although it's recommended to use the newer commands.
by roland
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...
by roland
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.
by roland
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...
by roland
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.
by roland
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...
by roland
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.
by roland
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.
by roland
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?
by roland
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
by 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
by 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)
by roland
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 ...

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