Search found 319 matches

by simonm
Mon Apr 22, 2019 2:34 am
Forum: 32-bit acorn hardware
Topic: Arm 3 Upgrade..... what Socket do I need
Replies: 6
Views: 1740

Re: Arm 3 Upgrade..... what Socket do I need

Thought I'd add a question to this thread since it is sort of related. What is the best way to remove an ARM chip from the socket? I'm not very hardware familiar and don't want to break anything. I have two A310's, one with an ARM3 daughterboard and one with the regular ARM chip, which I want to swa...
by simonm
Sun Apr 21, 2019 4:03 pm
Forum: 32-bit acorn hardware
Topic: Can I use a 44 Pin DOM on a 40 pin Acorn IDE?
Replies: 2
Views: 380

Can I use a 44 Pin DOM on a 40 pin Acorn IDE?

I bought a 512Mb IDE DOM device, but didn't notice it was a 44 pin one until it arrived. Is there a way to adapt it to work on the 40 pin IDE interfaces in an Archimedes? (I have A3010 candidate machines for it, one with HCCS IDE and one with Castle IDE). Was thinking about buying a molex adapter/ex...
by simonm
Fri Mar 29, 2019 3:42 pm
Forum: 8-bit acorn software: other
Topic: Biomorphs (BBC BASIC)
Replies: 2
Views: 698

Re: Biomorphs (BBC BASIC)

These articles are awesome. I always really loved the artwork that went with them too.
by simonm
Wed Mar 20, 2019 1:34 pm
Forum: new ideas wishlist & general chat
Topic: Doom?
Replies: 155
Views: 18028

Re: Doom?

That Beeb palette version is surprisingly effective! Yet again I'm lamenting the fact that Acorn didn't give us half-bright RGBs with the other 8 colours.
by simonm
Sun Mar 17, 2019 6:25 pm
Forum: new ideas wishlist & general chat
Topic: Doom?
Replies: 155
Views: 18028

Re: Doom?

This is awesome Rob. =D> Your dynamic palette idea sounds like an interesting challenge! It's quite a colourful game unfortunately (and colours in use vary depending on level locations) so 16-colours is a pretty tricky constraint. As has already been mentioned, there's a few well known ways to get f...
by simonm
Fri Mar 08, 2019 6:08 pm
Forum: 8-bit acorn hardware
Topic: Palettemate / enhanced video ULA with 4096 colours
Replies: 597
Views: 89000

Re: Palettemate / enhanced video ULA with 4096 colours

These CLPD thingies seem like moonshine magic to a software guy like me! Amazing what you guys can do with them. :D
by simonm
Sat Feb 23, 2019 3:41 am
Forum: 8-bit acorn software: other
Topic: help in using JSBeeb to debug code
Replies: 11
Views: 1175

Re: help is using JSBeeb to debug code

B2 has an excellent debugger built in.
https://github.com/tom-seddon/b2
by simonm
Mon Feb 18, 2019 2:42 am
Forum: 8-bit acorn hardware
Topic: Amstrad CPC464 emulator
Replies: 15
Views: 2281

Re: Amstrad CPC464 emulator

This sounds amazing Rob! Do you have any videos for those of us without a co pro?
by simonm
Sat Jan 12, 2019 2:42 pm
Forum: 8-bit acorn hardware
Topic: Free ICs to Good Home.
Replies: 37
Views: 3537

Re: Free ICs to Good Home.

IMG_20190112_143639.jpg
Arrived today! I have sound chips to play with! Thanks so much, I owe you a beer sir!
by simonm
Mon Dec 17, 2018 2:57 pm
Forum: 8-bit acorn hardware
Topic: Free ICs to Good Home.
Replies: 37
Views: 3537

Re: Free ICs to Good Home.

Ooh yes please. I've emailed you for re-homing a spare SN76489 and YM2149 sound chip!
\:D/
by simonm
Mon Dec 03, 2018 12:47 am
Forum: programming
Topic: Split screen modes
Replies: 2
Views: 674

Re: Split screen modes

There's a post here talking about that very thing:
viewtopic.php?p=149157#p149157
by simonm
Wed Nov 28, 2018 12:06 am
Forum: 32-bit acorn hardware
Topic: Repairing a dead A310 power supply
Replies: 56
Views: 6648

Re: Repairing a dead A310 power supply

IanS wrote:
Tue Nov 27, 2018 10:12 pm
I'd offer to look in my (unexploded) A310 PSU for the C2 value, but it looks suffiently different to yours, that it may not be helpful.
Thanks Ian. Crumbs, very different looking psu's! I wonder if my other A310 will be the same psu now!
by simonm
Wed Nov 28, 2018 12:04 am
Forum: 32-bit acorn hardware
Topic: Repairing a dead A310 power supply
Replies: 56
Views: 6648

Re: Repairing a dead A310 power supply

For C1, 0.01uF is a 10nF. Both the same value, just using a different SI multiplier. For C2, if it physically fits, a 100nF (or 0.1uF) type will be fine. They are interference suppression capacitors, so the value is not critical. Both C1 and C2 must be X2 rated (for safety) as they are connected ac...
by simonm
Tue Nov 27, 2018 9:11 pm
Forum: 32-bit acorn hardware
Topic: Repairing a dead A310 power supply
Replies: 56
Views: 6648

Re: Repairing a dead A310 power supply

Seems the caps on this board are very similar but not quite to the ones in Retroclinic's BBC cap repair kits.

C1 = X2 0.01uF (RC's are 10nF X2 RIFA)
C9 = 25V 470uF (RC's are 35V 220uF)
C2 = ??? (the popped one has burned so no idea what it is apart from some type of RIFA) (RC's are 100nF X2 RIFA)
by simonm
Tue Nov 27, 2018 8:25 pm
Forum: 32-bit acorn hardware
Topic: Repairing a dead A310 power supply
Replies: 56
Views: 6648

Re: Repairing a dead A310 power supply

Ok. I decided to get gnarly with it. It pops out if you encourage it upwards with a screwdriver.
Right so now I can see the PCB. There are loads of caps! But which ones will be borked or nearly borked?
IMG_20181127_202012.jpg
Here's the silver popped one
Here's the silver popped one
Yep deffo explodinated
Yep deffo explodinated
by simonm
Tue Nov 27, 2018 8:03 pm
Forum: 32-bit acorn hardware
Topic: Repairing a dead A310 power supply
Replies: 56
Views: 6648

Re: Repairing a dead A310 power supply

Thanks for help so far.
Does anyone know how I get the black grommet loosened? I can't get the PCB out unless I can remove it.
IMG_20181127_200049.jpg
by simonm
Mon Nov 19, 2018 6:59 pm
Forum: 32-bit acorn hardware
Topic: Replacement fan for A310
Replies: 5
Views: 789

Re: Replacement fan for A310

Interested in this too for exact same reason - new fan and filter for A310. I was eyeing up this one:
Look at this on eBay http://www.ebay.co.uk/itm/123215347110

But then you said 50mm ... #-o !
by simonm
Mon Nov 19, 2018 12:49 am
Forum: archive submissions
Topic: Manic Miner / JSW1 / JSW2 Combi
Replies: 8
Views: 1350

Re: Manic Miner / JSW1 / JSW2 Combi

Bit of a tangent, but speaking of jet set Willy, this site has been busy creating tilemaps of it for pc...

https://simonowen.com/spectrum/tilemap/
by simonm
Tue Oct 16, 2018 7:59 pm
Forum: 8-bit acorn software: other
Topic: Swift python files missing - help!?
Replies: 7
Views: 989

Re: Swift python files missing - help!?

Out of interest, what features/functionality does swift have that you particularly wanted to use?
by simonm
Sun Sep 23, 2018 7:16 pm
Forum: 8-bit acorn hardware
Topic: Question About Graphics Modes
Replies: 36
Views: 3157

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 7:10 pm
Forum: new bbc and electron games from 'retro software'
Topic: Planet Nubium : A game for the BBC Master
Replies: 42
Views: 9773

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 11:51 pm
Forum: 32-bit acorn hardware
Topic: Repairing a dead A310 power supply
Replies: 56
Views: 6648

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 8:54 am
Forum: 32-bit acorn hardware
Topic: A5000 but no display..."Out of Range"
Replies: 13
Views: 1503

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

Thanks for the tips folks!
by simonm
Wed Sep 19, 2018 4:14 pm
Forum: 32-bit acorn hardware
Topic: A5000 but no display..."Out of Range"
Replies: 13
Views: 1503

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 11:06 am
Forum: general
Topic: Request for help in organising/releasing source code
Replies: 92
Views: 12237

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 9:37 pm
Forum: programming
Topic: 160 x 128 mode
Replies: 21
Views: 2698

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 8:34 pm
Forum: programming
Topic: 160 x 128 mode
Replies: 21
Views: 2698

Re: 160 x 128 mode

=D> oh my....
by simonm
Sun Sep 16, 2018 8:45 pm
Forum: archive submissions
Topic: Reet Petite -Jackie Wilson-digiMusic
Replies: 11
Views: 2867

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?

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