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by roland
Mon Aug 24, 2020 9:40 pm
Forum: 8-bit acorn hardware
Topic: Acorn Electron online? Any such hardware.
Replies: 160
Views: 9315

Re: Acorn Electron online? Any such hardware.

I think I know what is going wrong.... Let me explain a bit how the processing of the received data works. The Electron sends a GET command to the server and the server responds with a lot of data. This data is chopped in chunks of max 1420 bytes (ethernet frame length). The WGET commands stores the...
by roland
Mon Aug 24, 2020 8:55 pm
Forum: 8-bit acorn hardware
Topic: Acorn Electron online? Any such hardware.
Replies: 160
Views: 9315

Re: Acorn Electron online? Any such hardware.

I think the two IPD (data) sections are fooling the WGET command.... The http/1.0 protocol should not be a problem. Of course I am willing to share the source code of the WGET command. Here it is.... The complete source files will be released later so every enthusiastic can play around with the cpld...
by roland
Mon Aug 24, 2020 7:38 pm
Forum: 8-bit acorn hardware
Topic: Acorn Electron online? Any such hardware.
Replies: 160
Views: 9315

Re: Acorn Electron online? Any such hardware.

Hi Dave, The text file is on acornatom.nl. I wonder why the <00> comes from.... User-Agent: Elk WiFi WGET <0D> <0A> <0D> <0A> <00> <-------- 10.575628: Receive <0D> <0A> OK <0D> <0A> > <0D> <0A> busy s...<0D> <0A> <0D> <0A> because that might case the problem; this can cause the busy s... message an...
by roland
Fri Aug 21, 2020 10:40 pm
Forum: 8-bit acorn hardware
Topic: Acorn Electron Project Expansions Sound Cartridge
Replies: 7
Views: 380

Re: Acorn Electron Project Expansions Sound Cartridge

Is it worth to rebuild this sound cartridge? The SN76489 seems very cheap on AliExpress.....
by roland
Fri Aug 21, 2020 9:58 pm
Forum: 8-bit acorn hardware
Topic: Acorn Electron online? Any such hardware.
Replies: 160
Views: 9315

Re: Acorn Electron online? Any such hardware.

I am quite getting along with this projects. I recently send two boards to Dave H and Hoglet so they can have a first look and do some tests. For doing some more tests, I'd like to have some more programmes that I can download. Can somebody provide the programmes that are on the introduction cassett...
by roland
Fri Aug 21, 2020 9:37 pm
Forum: programming
Topic: A new BBC Micro MOS Reassembly
Replies: 32
Views: 1680

Re: A new BBC Micro MOS Reassembly

Wow, you must have spend an enormous amount of time to get this site up =D>

However, like Sweh says, the downloads seem not to work....
by roland
Mon Aug 17, 2020 9:46 pm
Forum: acorn atom and acorn system series
Topic: My first Atom....
Replies: 26
Views: 1130

Re: My first Atom....

Maybe you can get some inspiration from another topic with similar problems: viewtopic.php?f=44&t=18020&start=150

Especially focus on the power supply (do all the IC's get their 5V (+/- 5%) and the behaviour of the CPU.

What equipment do you have for measuring signals?
by roland
Sun Aug 16, 2020 1:06 pm
Forum: 8-bit acorn software: other
Topic: Simulate a cold boot on the Electron
Replies: 6
Views: 396

Re: Simulate a cold boot on the Electron

Thanks for those answers. I used these and it worked. The Electron WiFi software has now an *UPDATE command to check if there are updates of the ROM. If so, the user is prompted if these update must be installed. If the users chooses to update the ROM then the new version is downloaded from my web s...
by roland
Sat Aug 15, 2020 8:46 am
Forum: 8-bit acorn software: other
Topic: Simulate a cold boot on the Electron
Replies: 6
Views: 396

Simulate a cold boot on the Electron

How can I simulate a cold start of the Electron? I can do a JMP (&FFFC) to enter the reset routine. Can I force it to simulate a cold start? A hard break might also be usable. I am aware that this won't be a real reset because the hardware is not reset this way. The main goal is to initialize the op...
by roland
Thu Aug 13, 2020 9:55 pm
Forum: 8-bit acorn hardware
Topic: Idea... BBC "Next"
Replies: 1
Views: 273

Re: Idea... BBC "Next"

There are already several discussions about this topic, for example: https://stardot.org.uk/forums/viewtopic.php?f=3&t=1283&p=6965 https://stardot.org.uk/forums/viewtopic.php?f=3&t=18757&p=260592 Mostly the fabrication of a new case and keyboard is the most expensive. Up till now, nobody has started...
by roland
Wed Aug 12, 2020 4:49 pm
Forum: 8-bit acorn software: other
Topic: UEF loader for the Electron
Replies: 5
Views: 386

Re: UEF loader for the Electron

davidb wrote:
Wed Aug 12, 2020 9:35 am
Perhaps UPCFS is what you need?
Indeed, UPCFS looks like a good starting point. I contacted Martin about it.
by roland
Wed Aug 12, 2020 9:02 am
Forum: 8-bit acorn software: other
Topic: UEF loader for the Electron
Replies: 5
Views: 386

UEF loader for the Electron

Is there a routine to convert or to read an UEF file on the Electron? This seems a silly question but the reason I ask is that there are many programs available as UEF file. With the WiFi interface I can download them from a web server and convert them to the actual program.
by roland
Sun Aug 09, 2020 4:31 pm
Forum: 8-bit acorn hardware
Topic: Acorn Electron online? Any such hardware.
Replies: 160
Views: 9315

Re: Acorn Electron online? Any such hardware.

I didn't know about this AP6 rom, I will test compatibility after my holidays. I have browsed through the source codes and I came upon this: This: "AP6v131.rom" but not this: "AP6v131t.rom" Today I have build a second board (in the way that it should be) and tested it with the AP6v131 ROM. There is...
by roland
Fri Aug 07, 2020 7:19 pm
Forum: acorn atom and acorn system series
Topic: Wanted: Parts for an Acorn Atom
Replies: 9
Views: 685

Re: Wanted: Parts for an Acorn Atom

@commandercoder: I just send you an email with an offer for 23 ic's for your Atom.
by roland
Fri Aug 07, 2020 6:36 pm
Forum: general
Topic: Today I received.....
Replies: 5990
Views: 614867

Re: Today I received.....

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
by roland
Thu Aug 06, 2020 10:45 pm
Forum: acorn atom and acorn system series
Topic: Wanted: Parts for an Acorn Atom
Replies: 9
Views: 685

Re: Wanted: Parts for an Acorn Atom

A 5V 2A power supply will probably do the job. I use usb power supplies for my Atom 2kXX and my Yarrb'd Atom. I have also send you a pm.
by roland
Thu Aug 06, 2020 9:58 pm
Forum: acorn atom and acorn system series
Topic: Wanted: Parts for an Acorn Atom
Replies: 9
Views: 685

Re: Wanted: Parts for an Acorn Atom

I have all the parts lying around except a power supply. Well, I have one but the shipping costs will be high because of the weight.
I can also supply an 2532 eprom with floating point rom.

And of course we will get this Atom back to life :lol:
by roland
Wed Aug 05, 2020 11:09 pm
Forum: other events + general event chat
Topic: General chat and feedback relating to the ABug video archives
Replies: 14
Views: 1225

Re: General chat and feedback relating to the ABug video archives

I also liked the JAFA systems presentation. It's funny that John gets his own programs back via this forum. Also the current development with a 65816 in both the E2P and Electron is interesting. The only question that I have for this kind of expansion is: will it ever be used in an effective way? Wh...
by roland
Tue Aug 04, 2020 10:09 pm
Forum: acorn atom and acorn system series
Topic: My first Atom....
Replies: 26
Views: 1130

Re: My first Atom....

mark71 wrote:
Tue Aug 04, 2020 3:57 pm
one question which isn't wholly clear is polarity of the power socket +5V centre pin?.
AFAIK, yes the center pin is +5V. You can verify it with a multimeter: there must be almost no resistance between the center pin and pin 20 of any ram (2114) chip.
by roland
Tue Aug 04, 2020 11:14 am
Forum: 8-bit acorn hardware
Topic: Acorn Electron online? Any such hardware.
Replies: 160
Views: 9315

Re: Acorn Electron online? Any such hardware.

@jgharston: can I "officially" claim and register OSWORD call &65 for my wifi driver? This seems to be free in the list of assigned calls in the BeebWiki.
by roland
Mon Aug 03, 2020 11:53 pm
Forum: stardot FORUM
Topic: Thank you!
Replies: 1
Views: 290

Re: Thank you!

Thank you. I hope you'll learn a lot on this forum so you can help other (new) users as well in the future.
by roland
Mon Aug 03, 2020 11:48 pm
Forum: acorn atom and acorn system series
Topic: My first Atom....
Replies: 26
Views: 1130

Re: My first Atom....

IC2,3 and 4 are data and address buffers. They are widely available on this forum and on well known webshops. IC5 is a 74LS30 used for disabling those buffers when internal memory is addressed. You don't need them if there's no hardware connected that uses address and data lines on PL6/7. IC 24 is a...
by roland
Mon Aug 03, 2020 8:19 pm
Forum: acorn atom and acorn system series
Topic: Pantheon
Replies: 9
Views: 1859

Re: Pantheon

Maybe it works with wine .... ?
by roland
Mon Aug 03, 2020 7:31 pm
Forum: 8-bit acorn hardware
Topic: XC95144-100 Development Board
Replies: 17
Views: 751

Re: XC95144-100 Development Board

=D> You did this lot better than I did with my first 44 pin CPLD. I had too many bridges (and a wrong footprint) so I had to remove the CPLD, made some changes and soldered the CPLD again. It didn't survive that adventure :(
by roland
Sat Aug 01, 2020 8:29 am
Forum: past all-day virtual ABugs
Topic: All-day 'Virtual' ABug session #7, Sat 5th September 2020, 9am - 11pm. Supporting CCfCH. *ACORN/ACORNSOFT Special*
Replies: 88
Views: 4915

Re: All-day 'Virtual' ABug session #7, Saturday 5th September 2020, 9am - 11pm. Supporting CCfCH.

I want to attend in the morning. If possible I want to demonstrate the Electron WiFi somewhere between 10:00 and 11:00. I think half an hour is enough, including time for questions.
by roland
Thu Jul 30, 2020 9:23 pm
Forum: general
Topic: Floppy Days Podcast with interview with Hermann Hauser now published
Replies: 3
Views: 442

Re: Floppy Days Podcast with interview with Hermann Hauser now published

I missed this post but I just listened to it. It's wonderful and entertaining to =D>

Two notable things:
When Herman talks about Sophie Wilson he mostly says 'he' and 'his'. I can understand why.....

Hilarious fragment: "and Bill's (Gates) response to that was: what's a network?" :lol:
by roland
Thu Jul 30, 2020 8:11 pm
Forum: programming
Topic: 24-bit Arithmetic in 6502
Replies: 2
Views: 457

Re: 24-bit Arithmetic in 6502

I can't see any logic in these errors. It would it make easier if you have a disassembly listing of the code that does this calculation. Can you post that here?
by roland
Thu Jul 30, 2020 1:43 pm
Forum: 8-bit acorn hardware
Topic: Acorn Electron online? Any such hardware.
Replies: 160
Views: 9315

Re: Acorn Electron online? Any such hardware.

I didn't know about this AP6 rom, I will test compatibility after my holidays. I have browsed through the source codes and I came upon this: REM I/O addresses REM ------------- REM &FC60-6F Electron 2681 serial controller REM &FC70-73 Electron expansion REM &FCC0-08 Floppy disk controller REM &FCD8/...
by roland
Thu Jul 30, 2020 10:50 am
Forum: 8-bit acorn hardware
Topic: Acorn Electron online? Any such hardware.
Replies: 160
Views: 9315

Re: Acorn Electron online? Any such hardware.

Just a bit playing this morning:
image.jpg
by roland
Thu Jul 30, 2020 10:35 am
Forum: acorn atom and acorn system series
Topic: Yarrb - redesigned
Replies: 226
Views: 13344

Re: Yarrb - redesigned

Besides that the AtoMMC already works at 4MHz it won't be necessary to stretch the clock at #Exxx because that's only the ROM. The MMC device is at #B400 which is now also stretched.

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