Search found 2574 matches

by oss003
Tue Jan 23, 2018 11:15 am
Forum: upcoming and recent events & exhibitions
Topic: ABug NORTH User Group meeting | 19-21 JAN 2018 | MANCHESTER *BOOKING INFO*
Replies: 133
Views: 4803

Re: ABug NORTH User Group meeting | 19-21 JAN 2018 | MANCHESTER *BOOKING INFO*

We're talking about patching the Atom econet utilities for the econet v3.50 rom.

Greetings
Kees
by oss003
Mon Jan 22, 2018 7:58 pm
Forum: acorn atom
Topic: My New Acorn Atom :)
Replies: 51
Views: 1306

Re: My New Acorn Atom :)

Just checked it on my Atom with AtoMMC rom at #Exxx and even without SD card, it displays ACORN ATOM + ATOMMC2 after a BREAK or power up.

Greetings
Kees
by oss003
Mon Jan 22, 2018 3:21 pm
Forum: acorn atom
Topic: Thinking of building your own Acorn Atom ??
Replies: 3
Views: 156

Re: Thinking of building your own Acorn Atom ??

Wow, that's a fast Atom ....... :shock:
Hopefully all other chips can deal with this speed.

Greetings
Kees
by oss003
Mon Jan 22, 2018 1:34 pm
Forum: acorn atom
Topic: My New Acorn Atom :)
Replies: 51
Views: 1306

Re: My New Acorn Atom :)

Hmmm .... IIRC it displays ACORN ATOM + ATOMMC2 even without SD-card which means an IRQ is generated ....
I could be wrong ...... or is that the #Exxx version?

Greetings
Kees
by oss003
Mon Jan 22, 2018 8:07 am
Forum: acorn atom
Topic: My New Acorn Atom :)
Replies: 51
Views: 1306

Re: My New Acorn Atom :)

to recap, on power up the little leds flash on the ATOMMC2 and the pin 19 on the PL8 goes high as well. so an IRQ is being generated on power up. Are you sure IRQ is going high on pin19 PL8, because IRQ is high and has to go low to generate an interrupt ..... @Charlie, isn't the card recognised whe...
by oss003
Sun Jan 21, 2018 9:12 pm
Forum: upcoming and recent events & exhibitions
Topic: ABug NORTH User Group meeting | 19-21 JAN 2018 | MANCHESTER *BOOKING INFO*
Replies: 133
Views: 4803

Re: ABug NORTH User Group meeting | 19-21 JAN 2018 | MANCHESTER *BOOKING INFO*

Just arrived at home,.
Thanks guys for organising this meeting.
I had a great time, meeting lots of people and adding faces to Stardot names .... :lol:
Also got some inspiration for new projects ...... #-o
Great meeting ... =D>

Greetings
Kees
by oss003
Thu Jan 18, 2018 7:01 pm
Forum: acorn atom
Topic: My New Acorn Atom :)
Replies: 51
Views: 1306

Re: My New Acorn Atom :)

That's good, the leds blink when reset goes low so your reset signal comes through without delay.
The only other thing I can think of is a delay on the IRQ signal. I read that you have a scope, can you check if there's a delay on the IRQ line ..... not the NMI.

Greetings
Kees
by oss003
Thu Jan 18, 2018 11:54 am
Forum: acorn atom
Topic: My New Acorn Atom :)
Replies: 51
Views: 1306

Re: My New Acorn Atom :)

When are the leds on the AtoMMC blinking, at power on or after 12 sec?

Greetings
Kees
by oss003
Wed Jan 17, 2018 9:16 pm
Forum: acorn atom
Topic: My New Acorn Atom :)
Replies: 51
Views: 1306

Re: My New Acorn Atom :)

Please check the 6502 pins for shortcuts or connections with the capacitor.

Greetings
Kees
by oss003
Wed Jan 17, 2018 7:14 am
Forum: acorn atom
Topic: My New Acorn Atom :)
Replies: 51
Views: 1306

Re: My New Acorn Atom :)

Not really, normally a reset signal causes the AtoMMC to generate an IRQ signal. The Atom picks up the IRQ and jumps to #A000 to initialize the AtoMMC. This does not always work fine because the BREAK key bounces and generates multiple reset pulses. Every time the reset goes low, the AtoMMC is reset...
by oss003
Fri Jan 12, 2018 6:39 pm
Forum: acorn atom
Topic: My New Acorn Atom :)
Replies: 51
Views: 1306

Re: My New Acorn Atom :)

Yes, that's the original design.
Please read primes note about the timing of the 123 and check that in the datasheets.

Greetings
Kees
by oss003
Fri Jan 12, 2018 7:15 am
Forum: acorn atom
Topic: My New Acorn Atom :)
Replies: 51
Views: 1306

Re: My New Acorn Atom :)

Nice job Walter ..... let the gaming begin ..... =D>

The easiest way to add a noisekiller is this one: http://www.acornatom.nl/atom_nieuws/198 ... 853086.htm
It also replaces the video buffers with more common 74LS244 and 74LS245 chips.

Greetings
Kees
by oss003
Thu Jan 11, 2018 2:13 pm
Forum: introduce yourself
Topic: Hello!
Replies: 10
Views: 260

Re: Hello!

Hi Mike,

Welcome and enjoy the forum .....

Greetings
Kees
by oss003
Thu Jan 11, 2018 2:13 pm
Forum: introduce yourself
Topic: Hello!
Replies: 10
Views: 317

Re: Hello!

Hi Matt,

Welcome and enjoy the forum .....

Greetings
Kees
by oss003
Thu Jan 11, 2018 2:12 pm
Forum: introduce yourself
Topic: Hello from Portugal
Replies: 14
Views: 318

Re: Hello from Portugal

Hi Daniel,

Welcome and enjoy the forum ........

Greetings
Kees
by oss003
Sat Jan 06, 2018 5:50 pm
Forum: acorn atom
Topic: Floppy Days Podcast on the Acorn Atom
Replies: 4
Views: 138

Re: Floppy Days Podcast on the Acorn Atom

Hi Randy,

As posted in your previous post, I'm happy to help you with info about the Atom.
May be if you post your questions, people are willing to answer them.

Greetings
Kees
by oss003
Thu Jan 04, 2018 7:45 pm
Forum: acorn atom
Topic: My New Acorn Atom :)
Replies: 51
Views: 1306

Re: My New Acorn Atom :)

Well done Walter,

welcome as a new Atom user ........... :)

Greetings
Kees
by oss003
Fri Dec 29, 2017 2:39 pm
Forum: introduce yourself
Topic: Hello!
Replies: 8
Views: 339

Re: Hello!

Hi John,

Welcome and enjoy the forum......

Greetings
Kees
by oss003
Mon Dec 25, 2017 10:05 am
Forum: software: games - high scores
Topic: Merry Christmas Gamers and all *.
Replies: 19
Views: 830

Re: Merry Christmas Gamers and all *.

Merry Christmas and the best wishes for 2018!!!!!
May it be a productive year .....

Greetings
Kees
by oss003
Sun Dec 17, 2017 8:37 pm
Forum: acorn atom
Topic: Atom user defined colours
Replies: 7
Views: 197

Re: Atom user defined colours

Yes , I mean extra registers to change the colourpalette values. I am not interested in other modes but inspired by the VideoNula topic, I just wondered if something like that is possible with the Godil colourpalette. All Atom games in colourmode, have a coloured background while most games in other...
by oss003
Sun Dec 17, 2017 7:40 pm
Forum: acorn atom
Topic: Atom user defined colours
Replies: 7
Views: 197

Re: Atom user defined colours

Sounds interesting ..... :)

I looked at the Godil code but how do you define extra addresses?

Greetings
Kees
by oss003
Sun Dec 17, 2017 7:30 pm
Forum: acorn atom
Topic: Atom user defined colours
Replies: 7
Views: 197

Re: Atom user defined colours

For the current hardware, you still can choose 1 out of 8 colours, right?
Is luminance also used?

Greetings
Kees
by oss003
Sun Dec 17, 2017 7:20 pm
Forum: acorn atom
Topic: Atom user defined colours
Replies: 7
Views: 197

Atom user defined colours

Hi guys, I was just wondering if it is possible to add user defined colours to the Godil. The colour palette is a constant array now but is it possible to add some addresses to the Godil to change the array values? The standard values must be restored after a BREAK. This way you can finally write ga...
by oss003
Sun Dec 10, 2017 11:00 am
Forum: acorn atom
Topic: Porting Atom under Risc OS
Replies: 6
Views: 456

Re: Porting Atom under Risc OS

It should be possible but Atom Basic is not as structured as BBC Basic. In the Basic #Cxxx ROM, there's one read at #B001 for reading the status of the ESCAPE key which is hardware depending and should be rewritten. Also not all Basic commands are in the Basic #Cxxx ROM, the commands PLOT, DRAW, MOV...
by oss003
Fri Dec 08, 2017 8:05 am
Forum: introduce yourself
Topic: Greetings!
Replies: 20
Views: 750

Re: Greetings!

Hi Darren,

welcome and enjoy the forum ....

Greetings
Kees
by oss003
Wed Dec 06, 2017 8:31 pm
Forum: introduce yourself
Topic: Introducing myself
Replies: 12
Views: 417

Re: Introducing myself

Hi Joe,

Welcome and enjoy the forum ...

Greetings
Kees
by oss003
Fri Dec 01, 2017 3:49 pm
Forum: acorn atom
Topic: I've got an Acorn Atom... Woot Woot :) (changed title (again) :)
Replies: 23
Views: 862

Re: I've got an Acorn Atom... Woot Woot :) (changed title (again) :)

Manual linking is soooooo 80's ... but if you like manual linking, it is ........ :D

Greetings
Kees
by oss003
Fri Dec 01, 2017 2:33 pm
Forum: acorn atom
Topic: I've got an Acorn Atom... Woot Woot :) (changed title (again) :)
Replies: 23
Views: 862

Re: I've got an Acorn Atom... Woot Woot :) (changed title (again) :)

sirmorris wrote:E000 AtoMMC requires a patched FP ROM.

For autobooting you need a patched Fxxx rom but you can manually boot the AtoMMC rom by linking to #EFC0.
The Floating Point patch is for BRAN, automatic ROM switching software.

Greetings
Kees
by oss003
Fri Dec 01, 2017 10:04 am
Forum: acorn atom
Topic: I've got an Acorn Atom... Woot Woot :) (changed title (again) :)
Replies: 23
Views: 862

Re: I've got an Acorn Atom... Woot Woot :) (changed title (again) :)

But if he did that wouldn't it preclude the use of SDDOS which IIRC is an $E000 ROM? SDDOS is an #Axxx rom so could be used instead of the DISATOM. SDDOS is a standalone rom so doesn't need the AtoMMC rom. You can use an #Exxx version of AtoMMC and an #Axxx version of SDDOS. This way you can direct...

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