Search found 208 matches

by simonm
Sun Sep 23, 2018 6:16 pm
Forum: hardware
Topic: Question About Graphics Modes
Replies: 34
Views: 490

Re: Question About Graphics Modes

Probably because 8 colours is 3-bits per pixel and in an 8-bit, byte based machine that's a pain to work with - much easier to blob pixels into bit quantities of 1, 2 or 4 that pack neatly into 8-bit bytes.

EDIT: As Gerald said also. Posted at same time!
by simonm
Sun Sep 23, 2018 6:10 pm
Forum: software: new games
Topic: New game for the BBC Master : Planet Nubium
Replies: 8
Views: 331

Re: New game for the BBC Master : Planet Nubium

This is really good! Love the graphics, and it's nice to play a game that's not teeth grindingly hard for a change!! :D I only played the first five levels so far, but felt it was quite easy overall (but maybe the later levels get harder, I havent seen them yet) Couple of suggestions if you fancy: G...
by simonm
Sat Sep 22, 2018 10:51 pm
Forum: hardware
Topic: Repairing a dead A310 power supply
Replies: 44
Views: 2811

Re: Repairing a dead A310 power supply

Ok, so I had some time to disassemble a bit more of the beast. The PSU in situ 2018-09-22 23.02.41.jpg The ganky motherboard 2018-09-22 23.06.58.jpg This was rattling around inside the PSU - looks like what's left of a capacitor 2018-09-22 23.17.18.jpg The PSU - so my question is, how is this PCB di...
by simonm
Thu Sep 20, 2018 7:54 am
Forum: hardware
Topic: A5000 but no display..."Out of Range"
Replies: 13
Views: 349

Re: A5000 but no display..."Out of Range"

Thanks for the tips folks!
by simonm
Wed Sep 19, 2018 3:14 pm
Forum: hardware
Topic: A5000 but no display..."Out of Range"
Replies: 13
Views: 349

Re: A5000 but no display..."Out of Range"

While the machine is stripped it could be a good idea to replace the PSU fan with a silent type. It will make using the computer much nicer. This will involve opening the PSU and soldering wires together though. This sounds interesting - could you advise a suitable replacement fan? Would that same ...
by simonm
Tue Sep 18, 2018 10:06 am
Forum: software & utilities for the pc, mac or unix
Topic: Request for help in organising/releasing source code
Replies: 79
Views: 2147

Re: Request for help in organising/releasing source code

Releasing the source as a zip may not be as sophisticated as putting it on GitHub, but it has achieved what I set out to. Absolutely, and a perfectly fine way to do it - entirely your prerogative how you want to distribute your own projects. That said, you might wish to consider putting some type o...
by simonm
Mon Sep 17, 2018 8:37 pm
Forum: projects
Topic: 160 x 128 mode
Replies: 21
Views: 421

Re: 160 x 128 mode

The bitshifters slack channel just lit up on the back of this revelation... :lol:
by simonm
Mon Sep 17, 2018 7:34 pm
Forum: projects
Topic: 160 x 128 mode
Replies: 21
Views: 421

Re: 160 x 128 mode

=D> oh my....
by simonm
Sun Sep 16, 2018 7:45 pm
Forum: archive submissions
Topic: Reet Petite -Jackie Wilson-digiMusic
Replies: 11
Views: 1438

Re: Reet Petite -Jackie Wilson-digiMusic

Haha! Nice one Rob, love it. :lol:
Out of interest, what method did you use to convert the audio?
by simonm
Sun Sep 16, 2018 5:47 pm
Forum: software & utilities for the pc, mac or unix
Topic: Request for help in organising/releasing source code
Replies: 79
Views: 2147

Re: Request for help in organising/releasing source code

Richard Russell wrote:
Sun Sep 16, 2018 4:12 pm
That would certainly be very helpful to me.
As promised then, hopefully it is of some use!
by simonm
Sun Sep 16, 2018 5:39 pm
Forum: development tools
Topic: Using GitHub - introduction & tutorial
Replies: 3
Views: 136

Using GitHub - introduction & tutorial

Hi all, Github/git has come up a few times in various discussions, and often in the context of folks who have some source code or a project they want to publish in the public domain, but are perhaps put off because at first inspection the world of git and Github can seem a bit overwhelming. I though...
by simonm
Sun Sep 16, 2018 4:05 pm
Forum: software & utilities for the pc, mac or unix
Topic: Request for help in organising/releasing source code
Replies: 79
Views: 2147

Re: Request for help in organising/releasing source code

What are the pros and cons of doing that rather than using my own GitHub account, for example? I always think of StarDot as being closely associated with Acorn, and 'my' BASICs (unlike Brandy for example) are absolutely not! :evil: An excellent question. There are no right or wrong ways to go about...
by simonm
Sun Sep 16, 2018 11:08 am
Forum: hardware
Topic: Repairing a dead A310 power supply
Replies: 44
Views: 2811

Re: Repairing a dead A310 power supply

Thanks, I think I'm going to journal what I do, in the event its helpful for future hardware beginners like me. I recommend that you open it up and carry out a visual inspection by eye (under a good light) looking for any physical trace of the cause of the smoke, such as soot marks, blackened, damag...
by simonm
Sun Sep 16, 2018 9:26 am
Forum: software & utilities for the pc, mac or unix
Topic: Request for help in organising/releasing source code
Replies: 79
Views: 2147

Re: Request for help in organising/releasing source code

If you think it appropriate Richard, your project could be easily added as-is to the stardot GitHub organisation alongside other open source community projects. Github is actually quite straight forward to use once you acquire a few bits of know how, and I'm continually impressed with how collaborat...
by simonm
Sat Sep 15, 2018 12:13 pm
Forum: hardware
Topic: Repairing a dead A310 power supply
Replies: 44
Views: 2811

Re: Repairing a dead A310 power supply

Resurrecting this thread in the hope some kind folks could help out a non-hardware-techie type like me with fixing an old A310 I bought on gumtree. The seller wanted to show me it working, but when he did, a bunch of smoke came out of the machine so he offered it for just a tenner - bargain! :D So, ...
by simonm
Thu Sep 13, 2018 10:35 am
Forum: projects
Topic: Happy Mrs Chicken!
Replies: 49
Views: 3409

Re: Happy Mrs Chicken!

Having worked on official Peppa Pig games, I can say that they do endeavour to protect their copyright but not that aggressively - there were at one point a whole slew of knockoff Android PP apps. Realistically, rights holders aren't going to eat the cost of enforcing against hobby projects like thi...
by simonm
Sun Aug 19, 2018 9:04 am
Forum: software
Topic: !Tracker music software
Replies: 22
Views: 560

Re: !Tracker music software

Pretty sure I have this. Not sure when I'll get a chance to download it though, but will try over next week.
by simonm
Mon Aug 13, 2018 11:28 am
Forum: software: new games
Topic: New version of Scramble for the beeb (going well)
Replies: 112
Views: 6069

Re: New version of Scramble for the beeb (going well)

Agree with Rich. This is crazy good for a beeb. Amazing work tricky. Would love to see a 'how it works' type blog if you ever feel so inclined.
by simonm
Tue Jul 24, 2018 8:55 am
Forum: hardware
Topic: John Kortink's BBC HDMI
Replies: 19
Views: 616

John Kortink's BBC HDMI

Not sure if already posted on here, but I noticed that John Kortink has been building up a HDMI converter for the Beeb...
https://twitter.com/WindfallNL
by simonm
Sat Jul 21, 2018 3:49 pm
Forum: software: other
Topic: Music software?
Replies: 13
Views: 476

Re: Music software?

I had a look at the site, deflemask seems to be supported & life on the forum... have you contacted the devs to see if they can add 4Mhz support? It might be as simple as adding a row to a config struct for them. Chris That's a good idea. Certainly would be handy to be able to export VGM's that are...
by simonm
Sat Jul 21, 2018 9:41 am
Forum: software: other
Topic: Music software?
Replies: 13
Views: 476

Re: Music software?

Definitely great to hear that there's interest in new music for the old Beeb. I am noodling away at a 6502 music player for Deflemask DMF files, but it may take some time! DMF is not a very compact file format, and cant be used 'as is' because it is gzipped, so some sort of file format conversion wi...
by simonm
Sat Jul 07, 2018 11:30 am
Forum: projects
Topic: Twisted Brain Demo
Replies: 38
Views: 2725

Re: Twisted Brain Demo

Thread Bump! I've added a few notes about the musak! Hopefully interesting! Enjoy. :D
by simonm
Fri Jun 29, 2018 6:16 pm
Forum: projects
Topic: Twisted Brain Demo
Replies: 38
Views: 2725

Re: Twisted Brain Demo

Ok, following on from kierans lead I'm gonna reserve a post here to talk about the musak bit of the demo! 😃 Righto - so I've done up some notes on how we did the music for this demo, and added it to GitHub. Generally the music playback for twisted brain is the same as all of our other demos, we calc...
by simonm
Mon Jun 18, 2018 3:03 pm
Forum: upcoming and recent events & exhibitions
Topic: NOVA 18 demoparty: 22nd - 24th June, Budleigh Salterton, Devon
Replies: 26
Views: 925

Re: NOVA 18 demoparty: 22nd - 24th June, Budleigh Salterton, Devon

Unfortunately I can't attend this now (boo), but if anyone else wants my £50 ticket to join Kieran they are welcome to go in my place. PM me if interested.
by simonm
Wed Jun 13, 2018 4:32 pm
Forum: projects
Topic: 640x512 50 fps Bad Apple on a B... how?!
Replies: 28
Views: 1148

Re: 640x512 50 fps Bad Apple on a B... how?!

This is very cool - great work Chris! =D> =D>
by simonm
Sun May 13, 2018 7:57 pm
Forum: software: other
Topic: SN76489 best sample playback?
Replies: 44
Views: 1472

Re: SN76489 best sample playback?

The variant in the Master System and Game Gear has a 16-bit shift register rather than a 15-bit, but it's embedded into the VDP so it's not necessarily drawn from official blueprints. This is actually a good improvement by Sega for the MS/GG, since it means that the periodic noise is exactly 4 octa...
by simonm
Sun May 13, 2018 7:49 pm
Forum: software: other
Topic: SN76489 best sample playback?
Replies: 44
Views: 1472

Re: SN76489 best sample playback?

This SMS Power link has been extremely useful for me over the past couple of years, while I was messing with sound chip things. In a correction to my earlier post, it appears that setting a tone register to 0 creates a continuous output (not 1 as I previously posted). Which makes sense as the chip u...
by simonm
Sat May 12, 2018 7:23 pm
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 77
Views: 3525

Re: New Disk Image Editor

As Daniel says, gpl is fine for community projects like this. I tend to use MIT license for most of my beeb stuff as I'm really not fussed what happens to the little bits of code I'm putting "out there". For your tool David, I'd suggest something like this to get you started: 1 - set yourself up wit...
by simonm
Fri May 11, 2018 9:31 pm
Forum: software: other
Topic: SN76489 best sample playback?
Replies: 44
Views: 1472

Re: SN76489 best sample playback?

Yes, the SN data sheet says this: 7. DATA TRANSFER The microprocessor selects the SN76489AN by asserting !CE (active low). Unless !CE is asserted, no data transfer can occur. When !CE is asserted, the !WE signal strobes the contents of the data bus to the appropriate control register. The data bus c...
by simonm
Fri May 11, 2018 9:24 pm
Forum: software: other
Topic: SN76489 best sample playback?
Replies: 44
Views: 1472

Re: SN76489 best sample playback?

There are some unanswered questions -- are the assumptions correct? Why does changing the volume (of a square wave) let you play back samples at all? (The average speaker cone position should be "in the middle", regardless). Are the channels really added linearly? I seem to remember that the "trick...