Search found 790 matches

by sirmorris
Mon Jul 06, 2020 1:26 pm
Forum: off-topic
Topic: Rapid not selling 60/40 to general punters anymore?
Replies: 17
Views: 505

Re: Rapid not selling 60/40 to general punters anymore?

Having had a Rapid cash account for years now I spoke to a very nice person who converted it to a credit account for me =D> The 'speak to a human' advice was top notch. Thanks for the input everyone, especially re: unleaded. I don't think I'm about to change over yet, especially since it costs way m...
by sirmorris
Sat Jul 04, 2020 8:39 am
Forum: off-topic
Topic: Rapid not selling 60/40 to general punters anymore?
Replies: 17
Views: 505

Rapid not selling 60/40 to general punters anymore?

I love the Rapid 60/40 solder. It cleans super easy with IPA, it doesn't smell and it's a joy to use. Great wetting and a lovely shine. AND NOW THEY WONT SELL IT TO ME :cry: :cry: :cry: Apparently you need to be a credit customer to be able to order it. Screenshot 2020-07-04 at 08.35.05.png I've app...
by sirmorris
Fri Jul 03, 2020 8:22 pm
Forum: acorn atom and acorn system series
Topic: TimeData MZ163 User manual and schematic
Replies: 2
Views: 714

Re: TimeData MZ163 User manual and schematic

Thank you so much for uploading this. I couldn't have upgraded this 16K board to 32K without it! 8) Also thanks to Mark @ Retroclinic for the chips =D>
IMG_20200703_200538.jpg
by sirmorris
Sat May 30, 2020 3:51 pm
Forum: acorn atom and acorn system series
Topic: AtoMMC extensions
Replies: 8
Views: 351

Re: AtoMMC extensions

:shock: excellent! The very latest (not yet prototyped) AtoMMC board has serial broken out. This should act as a driver for me to implement something!

Very cool work Roland, very cool indeed 8)
by sirmorris
Sat May 30, 2020 12:02 pm
Forum: acorn atom and acorn system series
Topic: AtoMMC extensions
Replies: 8
Views: 351

AtoMMC extensions

Because my project stack is only about 295 deep at the moment I've been thinking about things I can do with the extension header. Joystick. Networking with ESP. PS2 Keyboard. Disco lights, automated fish feeder, electric curtains might have to wait 8) :lol: The joystick is already supported. It's al...
by sirmorris
Sat May 30, 2020 11:43 am
Forum: acorn atom and acorn system series
Topic: Expanding the Atom with more memory
Replies: 4
Views: 242

Re: Expanding the Atom with more memory

A RAMROM/YARRB is definitely the best-of-the-best solution. It gives way more options than a bunch of individual mods. ROM paging, selectable windows in the memory map etc etc. That said, you might already have a RAM expansion and don't need the additional facilities that a modern solution will prov...
by sirmorris
Sat May 23, 2020 11:31 am
Forum: acorn atom and acorn system series
Topic: Odd reset/Atom MMC behaviour
Replies: 5
Views: 392

Re: Odd reset/Atom MMC behaviour

Hi Gav, I think I've fixed the issue. The latest firmware only releases the IRQ once a command has been received from the Atom. This will ensure that the IRQ is serviced no matter how fast or slow a card/Atom is. I have attached the latest build, which you can update your AtoMMC with. If you've done...
by sirmorris
Sat May 23, 2020 11:18 am
Forum: acorn atom and acorn system series
Topic: Crystal replacement
Replies: 5
Views: 245

Crystal replacement

Hi all, A crystal on my issue 3 is huge. ENORMOUS. I'd like to replace it with something a little more discreet. Well both actually. In case I come to fit a RAMROM. crystaltips.jpg From my readings there are parallel and series cut crystals. They have different use cases. Referencing the Atom schema...
by sirmorris
Sat May 23, 2020 10:23 am
Forum: acorn atom and acorn system series
Topic: AtoMMC2 help needed
Replies: 4
Views: 224

Re: AtoMMC2 help needed

We're on it 8)
by sirmorris
Wed May 20, 2020 12:22 pm
Forum: acorn atom and acorn system series
Topic: Replacement power jack for Atom
Replies: 6
Views: 352

Re: Replacement power jack for Atom

I've got plugs to fit the old socket but I wanted something more standard. Perhaps usb-c? :lol: 8)
by sirmorris
Wed May 20, 2020 11:44 am
Forum: acorn atom and acorn system series
Topic: AtoMMC2 RPi
Replies: 24
Views: 949

Re: AtoMMC2 RPi

roland wrote:
Wed May 13, 2020 8:16 pm
we'll end up with an Atom full of Pi Zero's: one for video, a TubePi and now also a MMC-Pi :lol:
:cry:
by sirmorris
Mon May 18, 2020 11:34 am
Forum: acorn atom and acorn system series
Topic: Replacement power jack for Atom
Replies: 6
Views: 352

Replacement power jack for Atom

Hi All,

Any recommendations for a replacement jack? I'd like something to drop in, using a modern style plug ideally. That funky old long connector is a pain. If anyone has a part number and supplier that would be great, thanks!
by sirmorris
Sat Feb 15, 2020 11:35 am
Forum: acorn atom and acorn system series
Topic: Unknown utility ROM - how to identify w/o dumping?
Replies: 4
Views: 500

Unknown utility ROM - how to identify w/o dumping?

A quick ? through the ROM's content might show commands etc but this wouldn't identify versions. I'd imagine a checksum would be the best way to positively identify a utility ROM when there is little chance of dumping it. There is a checksum algo in the manual IIRC, but I also seem to remember it's ...
by sirmorris
Mon Nov 18, 2019 12:42 pm
Forum: acorn atom and acorn system series
Topic: W65C02S6TPG-14 and AtoMMC (split from YARRB [SOLD OUT])
Replies: 25
Views: 1148

Re: W65C02S6TPG-14 and AtoMMC (split from YARRB [SOLD OUT])

I think this is a great idea. I am working actively on a new board so this would work perfectly.
by sirmorris
Wed Sep 11, 2019 8:52 pm
Forum: wanted
Topic: Wanted: Atom key posts / ] key
Replies: 30
Views: 1789

Re: Wanted: Atom key posts / ] key

OK you're most welcome to it. Just let me have your address and I'll pop it in the post for you. Can you PM yet?
by sirmorris
Mon Sep 09, 2019 8:35 pm
Forum: wanted
Topic: Wanted: Atom key posts / ] key
Replies: 30
Views: 1789

Re: Wanted: Atom key posts / ] key

Is a ] key still required? I have one. Or is it a [ ?

C
by sirmorris
Mon Jun 24, 2019 6:42 pm
Forum: acorn atom and acorn system series
Topic: Just bought an Atom
Replies: 75
Views: 5027

Re: Just bought an Atom

The version online is very old and incomplete, there is a much more up-to-date version here:

https://github.com/charlierobson/atommc ... ine-Manual
by sirmorris
Mon Jun 24, 2019 10:26 am
Forum: general
Topic: Github problems: can anybody help?
Replies: 32
Views: 1722

Re: Github problems: can anybody help?

Image
by sirmorris
Fri Jun 14, 2019 7:14 am
Forum: acorn atom and acorn system series
Topic: 2AtomFPGA - successor of Yarrb
Replies: 17
Views: 1061

Re: 2AtomFPGA - successor of Yarrb

What's the socket for? EEPROM? It all sounds quite exciting Roland!
by sirmorris
Fri Jun 14, 2019 7:10 am
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1144
Views: 73742

Re: RGB to HDMI using a Pi Zero and a small CPLD

If you need a spectrum edge connector I can sort you out.
by sirmorris
Wed Jun 12, 2019 10:58 am
Forum: acorn atom and acorn system series
Topic: YARRB [SOLD OUT]
Replies: 275
Views: 22020

Re: YARRB

I am curious what really caused the problems. Are you willing to figure that out by for example comparing the most critical signals at the good and the bad ic's? I suspect that one or all are marginal in some parameter or other. I'm no detective though, and wouldn't know where to begin with an anal...
by sirmorris
Tue Jun 11, 2019 8:31 pm
Forum: acorn atom and acorn system series
Topic: YARRB [SOLD OUT]
Replies: 275
Views: 22020

Re: YARRB

I suspected the 8255 as occasional flips into graphics mode could be explained by it. And indeed changing it out has solved the problems. Ctrl-G now sings beautifully :lol: It was still glitchy though so I set about swapping out chips and the 3 clock related bods around IC44 were my best educated gu...
by sirmorris
Tue Jun 11, 2019 1:48 pm
Forum: acorn atom and acorn system series
Topic: YARRB [SOLD OUT]
Replies: 275
Views: 22020

Re: YARRB

@Dace* - I've tried a couple of AtoMMC boards and they behave the same so I don't think it's a mechanical issue, but thanks for the suggestion. Further to that I undid the YARRB mods and swapped in my RAMROM and lo, the machine works perfectly. I can reliably run every program in the collection, the...
by sirmorris
Tue Jun 11, 2019 11:50 am
Forum: acorn atom and acorn system series
Topic: YARRB [SOLD OUT]
Replies: 275
Views: 22020

Re: YARRB

So after much probing and messing around I'm still a little stumped. I've checked jumper positions and clock waveforms and I'm happy they're in spec. No IRQ jumper is present. It's an R6502. I've changed the LS04 clock conditioner for a new chip even though the scope showed some nice clean signals. ...
by sirmorris
Sat Jun 08, 2019 11:56 am
Forum: acorn atom and acorn system series
Topic: YARRB [SOLD OUT]
Replies: 275
Views: 22020

Re: YARRB

So weirdness continues. This morning I thought I'd get some measuring done and lo, the machine is (almost) behaving itself. I've done nothing, it's in the same state I left it. But I get a (mostly) stable boot, ability to load the menu from SD card, and even run some of the software. I've written a ...
by sirmorris
Fri Jun 07, 2019 3:14 pm
Forum: acorn atom and acorn system series
Topic: YARRB [SOLD OUT]
Replies: 275
Views: 22020

Re: YARRB

Hi everyone. As another data point I've currently got a machine on the bench which is showing instability when YARRB is installed. I haven't yet reverted the machine to a pre-YARRB configuration but that's on the cards. The machine was post renovation and said to be working when I received it, but I...
by sirmorris
Thu May 16, 2019 8:53 am
Forum: acorn atom and acorn system series
Topic: Atom Econet Adapters
Replies: 7
Views: 807

Re: Atom Econet Adapters

Go for it!

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