Search found 548 matches

by guesser
Sun Jan 24, 2021 6:35 pm
Forum: general
Topic: Mode 7 teleetxt graphics question
Replies: 15
Views: 444

Re: Mode 7 teleetxt graphics question

ash73 wrote:
Sun Jan 24, 2021 4:23 pm
Shame they didn't allocate 2 bytes per character with the second byte being colour codes etc... 2k screen is nothing and it would have been a lot simpler!
Remember it came from teletext though, adding a whole extra kilobyte of RAM and making everything 16-bit wasn't nothing in the early 70s :)
by guesser
Sun Jan 24, 2021 6:14 pm
Forum: general
Topic: Mode 7 teleetxt graphics question
Replies: 15
Views: 444

Re: Mode 7 teleetxt graphics question

I'm entirely happy with either name, but what irritates me is the use of the strange pattern of dots to indicate 'graphics' (or 'mosaics') in the control-character symbols. I much prefer to use G , for Graphics, and this is the set of symbols I use in my BBC BASICs: It's a long time ago now, but I ...
by guesser
Sun Jan 24, 2021 6:09 pm
Forum: general
Topic: Mode 7 teleetxt graphics question
Replies: 15
Views: 444

Re: Mode 7 teleetxt graphics question

Can you import a MODE7 screen from BeebEm into your editor just as easily? That's how I made it. I created a save state in beebem and then located the screen memory in a hex editor and saved it out as a .bin file. Then just drag and drop into the editor. There isn't really a convenient way to save ...
by guesser
Sun Jan 24, 2021 2:21 pm
Forum: general
Topic: Mode 7 teleetxt graphics question
Replies: 15
Views: 444

Re: Mode 7 teleetxt graphics question

lurkio wrote:
Sun Jan 24, 2021 2:11 pm
Btw, for some reason "hold graphics" (rather than "hold mosaics") is how it's referred to in the BBC Micro User Guide.
Yeah sorry, it's the same in the original 1976 teletext specification. I call them mosaics as that's how they're named in the current teletext spec!
by guesser
Sun Jan 24, 2021 2:17 pm
Forum: general
Topic: Mode 7 teleetxt graphics question
Replies: 15
Views: 444

Re: Mode 7 teleetxt graphics question

Here is that screen in my teletext editor which shows where all the control codes are placed.
WOFcodes.png
by guesser
Sun Jan 24, 2021 2:11 pm
Forum: general
Topic: Mode 7 teleetxt graphics question
Replies: 15
Views: 444

Re: Mode 7 teleetxt graphics question

That's a feature of teletext graphics called hold mosaics . You have to insert a special control code to tell the SAA5050 to display the last mosaic character instead of an empty space for subsequent control codes. There's various rules on what resets the held mosaic and so on. It can be a bit fiddl...
by guesser
Fri Jan 15, 2021 12:48 pm
Forum: off-topic
Topic: Forced into (NET) silence . . .
Replies: 11
Views: 481

Re: Forced into (NET) silence . . .

Yeah my dad has a little 4G wifi modem thingy and I have a smartphone, but we'd only use that for checking emails a couple of times a day and ordering a new modem if the internet was totally fried. Pointing the usual firehose of multiple computers at it the data would be chewed through in seconds. H...
by guesser
Fri Jan 15, 2021 3:02 am
Forum: off-topic
Topic: Forced into (NET) silence . . .
Replies: 11
Views: 481

Re: Forced into (NET) silence . . .

I used to have a PC running on a UPS. But one day the PC died. Turns out the UPS was no longer producing an output despite what it’s charge state indications were showing... That exact thing happened to my first UPS. Just randomly died one day for no apparent reason. Then I ran the server with no p...
by guesser
Thu Jan 14, 2021 1:36 pm
Forum: off-topic
Topic: Forced into (NET) silence . . .
Replies: 11
Views: 481

Re: Forced into (NET) silence . . .

I used to have an old router configured as a PPPoA bridge lying around as a stand-by after the first time my modem died, but since we moved to VDSL I'm operating with no standby :shock: I shouldn't have said no to the crappy ISP modem when we switched just because the one I already had was capable o...
by guesser
Sun Jan 10, 2021 2:38 am
Forum: general
Topic: Teletext?
Replies: 6
Views: 340

Re: Teletext?

Would I be able to view teefax on my BBC monitor rather than using a VCR and a TV? Yes the display on the beeb is whatever you normally use. The VCR (or standalone modulator) is to take the place of the TV transmitter, and get the video signal containing the teletext signal from the pi into the tel...
by guesser
Fri Jan 08, 2021 11:32 pm
Forum: general
Topic: Teletext?
Replies: 6
Views: 340

Re: Teletext?

Thanks, guys. How could I still utilise a BBC cheesewedge Teletext adapter and use it on the beeb? Is that possible? Yep, install vbit2 on a raspberry pi and connect its composite output to the input of a VCR or UHF modulator. Connect the RF output of the modulator to the antenna input of the chees...
by guesser
Fri Jan 08, 2021 8:33 pm
Forum: general
Topic: Teletext?
Replies: 6
Views: 340

Re: Teletext?

It was phased out in the UK with the digital switchover, but is still going strong on the continent. A teletext signal can be generated (with no additional hardware) using a Raspberry Pi, which can then be fed into the Teletext adaptors via a standalone UHF modulator or VCR. https://github.com/peter...
by guesser
Mon Jan 04, 2021 9:40 pm
Forum: off-topic
Topic: Windows 10 reinstall help needed
Replies: 26
Views: 845

Re: Windows 10 reinstall help needed

(a) if the machine came with Windows 7 and was upgraded to Windows 10 then when prompted for a product key click 'I do not have a key' then pick the correct version of Windows 10 (Home / Pro) - after install it will automatically activate using the hardware ID. Hopefully that also holds true for sy...
by guesser
Mon Jan 04, 2021 8:13 pm
Forum: off-topic
Topic: Windows 10 reinstall help needed
Replies: 26
Views: 845

Re: Windows 10 reinstall help needed

They were saying you have to remove/disable all network adapters to make it appear now :shock:
by guesser
Mon Jan 04, 2021 7:33 pm
Forum: off-topic
Topic: Windows 10 reinstall help needed
Replies: 26
Views: 845

Re: Windows 10 reinstall help needed

YMMV though, and I have noted a real inconsistency in how the very-same USB stick installs differently on different laptops: some allowing me during install to create a local admin and activate windows, and some requiring me to sign in during install with my M$ account. Bizarre! I've just been told...
by guesser
Mon Jan 04, 2021 4:41 pm
Forum: off-topic
Topic: Windows 10 reinstall help needed
Replies: 26
Views: 845

Re: Windows 10 reinstall help needed

As I understand it the license is tied to the hardware, not your Microsoft account (which isn't required at all if you don't use the "store"). If you pop a blank drive in and do a fresh install using the media creation tool it should just recognise the hardware and activate itself. I've no...
by guesser
Wed Dec 30, 2020 6:24 pm
Forum: modern implementations of classic programming languages
Topic: Options for embedding BBC BASIC code in URL
Replies: 16
Views: 441

Re: Options for embedding BBC BASIC code in URL

In terms of browser compatibility huge URLs is pretty much a non issue. It was Internet Explorer that was the problem, and that's not worth trying to support in new projects any more, particularly ones using shiny new web technologies that IE can't do. Web server and search engine URL length limits ...
by guesser
Wed Dec 30, 2020 3:40 pm
Forum: off-topic
Topic: Mancave advice needed!
Replies: 10
Views: 616

Re: Mancave advice needed!

If most gear is only going to be stored, put in plastic bags, put a desiccant in the bag and seal it. Then wrap in three layers of bubble wrap. Put in another plastic bag, seal it. Then put in a cardboard box and tape shut. "Then affix suitable postage and a label containing the following to t...
by guesser
Thu Dec 24, 2020 2:16 pm
Forum: 8-bit acorn hardware
Topic: Acorn teletext adapter
Replies: 26
Views: 2784

Re: Acorn teletext adapter

I don't think I ever took any measurements off the read adapter. I think I possibly just inferred everything from what I could read of the schematic and implemented something close enough for it to get 16 lines of data into RAM and mostly work. It's far from an accurate emulation! Sadly I don't have...
by guesser
Tue Dec 22, 2020 2:24 pm
Forum: 8-bit acorn hardware
Topic: Teletext Adapter Service Manual
Replies: 29
Views: 2281

Re: Teletext Adapter Service Manual

I'll be interested to see what you figure out about TFS. Hopefully sooner rather than later I'll get something that can be packaged up into a simple one click download and install to Just Work for every use case (ambitious I know :lol: ) It'll change the stream format slightly but not drastically, a...
by guesser
Tue Dec 22, 2020 1:29 pm
Forum: 8-bit acorn hardware
Topic: Teletext Adapter Service Manual
Replies: 29
Views: 2281

Re: Teletext Adapter Service Manual

I meant, is the vbit2 stream available online to feed an emulator? Vbit2 is what generates the teletext packet stream from a service's page files, which are pulled from various svn and git repositories. I've got some slightly out of date notes about using it with Beebem on Windows which I should ma...
by guesser
Tue Dec 22, 2020 4:35 am
Forum: 8-bit acorn hardware
Topic: Teletext Adapter Service Manual
Replies: 29
Views: 2281

Re: Teletext Adapter Service Manual

Are any of these services available online, or do I have to run vbit2 locally to serve the pages? They are, you can view three of them ( Teefax , Ceefax , and Chunkytext ) using the teletext viewer on my website (it simulates a tv, so power on, select a channel, select text etc. as you would on a r...
by guesser
Tue Dec 22, 2020 1:13 am
Forum: 8-bit acorn hardware
Topic: Teletext Adapter Service Manual
Replies: 29
Views: 2281

Re: Teletext Adapter Service Manual

I have a BBC Wedge Teletext Adaptor with the 2 Rom versions. It is packed away in the loft and has not been used for many years. What can I do with it? Teletext is not broadcast anymore. Stick this on a pi and hook it up via a VCR or standalone UHF modulator! https://github.com/peterkvt80/vbit2 :D ...
by guesser
Tue Dec 15, 2020 6:49 pm
Forum: off-topic
Topic: Soldering help - tip shaft sizes.
Replies: 20
Views: 825

Re: Soldering help - tip shaft sizes.

1024MAK wrote:
Tue Dec 15, 2020 3:35 pm
PS I still think trying to solder up mini DIN connectors is the hardest, as the plastic melts as soon as you think about picking up the iron...
Second hardest after the evil 13 pin DIN-alike :lol:
by guesser
Sun Nov 22, 2020 9:41 pm
Forum: general
Topic: Stardot possibly hacked?
Replies: 19
Views: 1341

Re: Stardot possibly hacked?

Yeah, I don't expect it'd work in a lot of sign up pages and stuff. I can't even send mails to it using my email client as it's still not supported.

It was just to amuse myself really :)
by guesser
Sun Nov 22, 2020 2:58 pm
Forum: general
Topic: Stardot possibly hacked?
Replies: 19
Views: 1341

Re: Stardot possibly hacked?

.....yes, you have the option of including insults in your email addresses! Which you then have to read aloud to authenticate your identity when you speak to the worker ants, who then either take it as a very personal insult, or laugh along with you. I was playing with the settings on my mail serve...
by guesser
Fri Nov 20, 2020 10:57 pm
Forum: 8-bit acorn hardware
Topic: 8271 floppy controller reverse engineer journey write-up
Replies: 23
Views: 1467

Re: 8271 floppy controller reverse engineer journey write-up

Clearly the solution is to finish reverse engineering it down to the gate level and re-implement it exactly the same in a large CPLD :lol:
by guesser
Fri Nov 20, 2020 10:47 pm
Forum: general
Topic: Stardot possibly hacked?
Replies: 19
Views: 1341

Re: Stardot possibly hacked?

I think it is also quite a common tactic that if hackers get hold of someone's address book or email account that they will just pair address from that on to make the email seem more believable. I get this with a member of the Speccy scene from years ago. I assume his system was exploited and addre...
by guesser
Sat Nov 14, 2020 6:40 pm
Forum: general
Topic: DOS vs UNIX Line Endings
Replies: 21
Views: 819

Re: DOS vs UNIX Line Endings

Or is there a way on a Linux text editor (Kate, Gedit etc) for me to specify my own (per-file preferably) line endings so I can just use the "BM Standard" of ASCII 13? It's more of a per-project than per-file thing, but specifying what an editor should use for line endings in different ty...

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