Search found 185 matches

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: 8
Views: 243

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: 870

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: 1218

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: 1218

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: 76
Views: 3033

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: 1218

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: 1218

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...
by simonm
Fri May 11, 2018 9:06 pm
Forum: software: other
Topic: SN76489 best sample playback?
Replies: 44
Views: 1218

Re: SN76489 best sample playback?

Listening in on the high precision audio technicals being discussed here, I'm amused by how little we knew BITD - in fact I think we got pretty lucky with the samples we did on the various yorkshire boys sample demos. It certainly wasn't because we understood the hardware that well. In fact, I belie...
by simonm
Tue Apr 10, 2018 3:47 pm
Forum: off-topic
Topic: web shop / ecommerce site
Replies: 9
Views: 652

Re: web shop / ecommerce site

I read somewhere that craft cms has an ecommerce plugin. Not used it though so can't vouch if it suits your needs.
by simonm
Sat Apr 07, 2018 6:32 pm
Forum: programming
Topic: Acorn files on other platforms
Replies: 38
Views: 1682

Re: Acorn files on other platforms

I used to like Perl quite a lot, but then I discovered Python, which is much more structured and easier to interface with underlying systems and binary files. Appreciate it's not everyone's cup of tea though, and it does take a bit of getting used to at first (wot, no braces?! :lol: ) David B's scri...
by simonm
Sat Apr 07, 2018 4:12 pm
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 76
Views: 3033

Re: New Disk Image Editor

This is really great David. Given that I was considering writing such a tool from scratch, you've accelerated the process significantly. You mentioned you'd be open to sharing the source, which would be really fantastic for me just now as I'm particularly interested in finding a way to get my A5000 ...
by simonm
Thu Mar 29, 2018 11:41 pm
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 76
Views: 3033

Re: New Disk Image Editor

^^ this. I mean, .inf files do get a job done, but I've never really warmed to the idea of them. And spaces in filenames really isnt even a thing anymore. So a neat tool that lets me pack all my acorn files into a nice image, preserving file types etc., instead of lots of bitty PC host files, sounds...
by simonm
Wed Mar 28, 2018 10:33 am
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 76
Views: 3033

Re: New Disk Image Editor

Sounds great David. It's been brilliant to see how much community effort has enhanced open sourced projects like BeebAsm and B-Em.
I actually much prefer c# over c++ for getting stuff done quickly. Plus I believe .NET apps can run just fine on Mac/Linux using Wine.
by simonm
Tue Mar 27, 2018 10:35 pm
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 76
Views: 3033

Re: New Disk Image Editor

On a related note, since these days a lot of modded systems use CF or SD cards, does anyone know if it's easy to parse the .img files you get from a CF card (using a tool like win32diskimager) as an ADFS HD image? I presume they are low level byte copies of whats on the card, but not sure how the da...
by simonm
Tue Mar 27, 2018 10:30 pm
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 76
Views: 3033

Re: New Disk Image Editor

This looks very promising! I was thinking recently (since I'm archiving a lot of acorn disks) that a tool like this would be super useful.
Out of interest - do you have any plans to open source it? (via Github etc.)
by simonm
Thu Mar 15, 2018 7:08 pm
Forum: off-topic
Topic: Acorn Art Thread
Replies: 292
Views: 21358

Re: Acorn Art Thread

Loving the gallery disk! =D>
by simonm
Tue Mar 13, 2018 11:31 pm
Forum: development tools
Topic: BeebAsm
Replies: 73
Views: 5093

Re: BeebAsm

Great work guys! =D>
by simonm
Wed Feb 07, 2018 3:49 pm
Forum: emulators
Topic: jsbeeb - a Javascript emulator
Replies: 153
Views: 17940

Re: jsbeeb - a Javascript emulator

Hey Matt - I was wondering how feasible it might be to incorporate support for emulation of RobC's VideoNULA in jsbeeb?
Would be terrific to run some of the demos that use it in a browser.

Cheers
Simon
by simonm
Mon Jan 08, 2018 9:01 pm
Forum: hardware
Topic: A blitter for the beeb?
Replies: 59
Views: 4492

Re: A blitter for the beeb?

All. Kinds. Of. Awesome.
by simonm
Tue Nov 21, 2017 11:06 am
Forum: hardware
Topic: NuLA demos
Replies: 130
Views: 9525

Re: NuLA demos

I've released a new version of the two NuLA gallery demos, which I tweaked at ABUG over the weekend, and can confirm they run ok on Turbo MMC now.
https://github.com/simondotm/bbc-nula/releases/tag/1.0
by simonm
Tue Nov 21, 2017 11:03 am
Forum: emulators
Topic: Emulator support for VideoNuLA
Replies: 60
Views: 5160

Re: Emulator support for VideoNuLA

Just a thought on the latest B-Em developments - GitHub releases looks like it might be a convenient way to distribute the various compiled binaries for B-Em ... for those of us without a build environment anyway. You can create a tagged release and upload compiled binaries as attachments. https://h...
by simonm
Tue Oct 10, 2017 5:28 pm
Forum: past events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 139
Views: 10664

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

sixxdog_uk wrote:

Richard,

SimonM wanted to be in room2 with his brother so , I've moved you back into the main room where you originally were mate.
Lol that's my "bro" kieran as in coder bro!
by simonm
Mon Sep 25, 2017 12:39 pm
Forum: hardware
Topic: NuLA - A 'softer' palette for games
Replies: 7
Views: 949

Re: NuLA - A 'softer' palette for games

Great idea!
by simonm
Thu Sep 21, 2017 9:39 pm
Forum: software: other
Topic: kryoflux for the BBC
Replies: 7
Views: 1371

Re: kryoflux for the BBC

Good to know, thanks. Had no idea that old pc 5.25" drives were so rare now, hardly any on ebay and what is on there is £100!!! :shock:
by simonm
Thu Sep 21, 2017 4:16 pm
Forum: software: other
Topic: kryoflux for the BBC
Replies: 7
Views: 1371

Re: kryoflux for the BBC

Have just stumbled upon Kyroflux as a "thing" and it sounds excellent as a I have a ton of old 5.25" beeb floppies that need archiving and I like the comforting sound of an analogue capture direct to PC. If anyone has any tips on which drives work best with it that would be good. Also if anyone has ...
by simonm
Wed Sep 20, 2017 3:36 pm
Forum: hardware
Topic: NuLA demos
Replies: 130
Views: 9525

Re: NuLA demos

sbadger wrote:hmmmmmmmmm. still seems to hang at the Nula screen
Gah! Working somewhat in the dark here. Ok.... :-k :-k
by simonm
Wed Sep 20, 2017 3:28 pm
Forum: hardware
Topic: NuLA demos
Replies: 130
Views: 9525

Re: NuLA demos

Cheers Dave. Looks like I'll be using MMFS on my beeb from now on then as I don't want to attempt removing the video ula from my master. it's like shaving yaks getting this working, I just tried to load MMFS into swram and *unplugged my smartspi rom, it just gives me 'Card?' Hmmm... on the assumpti...
by simonm
Wed Sep 20, 2017 3:25 pm
Forum: hardware
Topic: NuLA demos
Replies: 130
Views: 9525

Re: NuLA demos

Aha, outstanding sleuthing chaps, thanks. This probably means almost all of our demos wont work on this FS then, since we've been playing fast and loose with page 13, like forever! :lol: I've relocated this buffer and attached a patched SSD (this one has the old OSFILE/OSFIND code back in). Please c...
by simonm
Wed Sep 20, 2017 12:27 pm
Forum: hardware
Topic: NuLA demos
Replies: 130
Views: 9525

Re: NuLA demos

For what its worth, and in case it's helpful, here is the code as it was: Use OSFIND to open a file for read. If it succeeds: close the file proceed to load it using OSFILE (mainly so that we can get the file's load + exec address into a param block). otherwise: reset filename for the numbered file ...
by simonm
Wed Sep 20, 2017 9:25 am
Forum: hardware
Topic: NuLA demos
Replies: 130
Views: 9525

Re: NuLA demos

hoglet wrote: Really???? where exactly?
My bad, thought these were the same things. I'm a n00b on this stuff. :)