Search found 3580 matches

by roland
Thu Mar 26, 2020 8:15 pm
Forum: acorn atom and system
Topic: 32k RAM , #0000 #7FFF
Replies: 8
Views: 245

Re: 32k RAM , #0000 #7FFF

32k ram is more then enough for me :D :D :D :D . That's what I thought a few years ago but my Atom now has 512KB RAM. And I am working on a project that actually is going to use a lot of this memory. I can really recommend Hoglet's noise killer video ram board. It gives a nice and quiet screen when...
by roland
Thu Mar 26, 2020 7:49 pm
Forum: acorn atom and system
Topic: My old Atom for you to see
Replies: 8
Views: 380

Re: My old Atom for you to see

Good to hear that it works - but I didn't expect otherwise :mrgreen:
After all it was build and tested. Enjoy your memory board!
by roland
Thu Mar 26, 2020 7:46 pm
Forum: acorn atom and system
Topic: 32k RAM , #0000 #7FFF
Replies: 8
Views: 245

Re: 32k RAM , #0000 #7FFF

This screen shows that your Atom is screaming for more RAM .... you can easily add 2K extra :lol:
Consider replacing the video memory by a single 8K static ram, that might solve your screen issues, saves energy and adds more RAM. If you need some more information or some components then let me know!
by roland
Wed Mar 25, 2020 10:42 pm
Forum: acorn atom and system
Topic: Re: ROM IC24 Acorn Atom #A000-#AFFF
Replies: 26
Views: 566

Re: ROM IC24 Acorn Atom #A000-#AFFF

I don't think that you're a noob because you manage to make an Arduino read a file from an sd card and send it to your Atom. I neverever touched an Arduino and I wouldn't know how to read a file. And people call me an ICT specialist (but that's their fault :wink: ). Since you managed to transfer a f...
by roland
Wed Mar 25, 2020 7:14 pm
Forum: acorn atom and system
Topic: Re: ROM IC24 Acorn Atom #A000-#AFFF
Replies: 26
Views: 566

Re: ROM IC24 Acorn Atom #A000-#AFFF

Nice work Jan! You could also use the A-port on the large PL6/7 connector, that would have saved you the shortcuts of IC50. You can also use the A-port for 8 bit in and the B-port for 8 bit out, completely with handshake. I did that in my Atom-in-PC, so hardware and software examples are available. ...
by roland
Mon Mar 23, 2020 6:59 pm
Forum: off-topic
Topic: Isolating myself - for three months !!!!!!!!!!!
Replies: 33
Views: 1302

Re: Isolating myself - for three months !!!!!!!!!!!

Thanks to the many people that went to the beaches last weekend and were celebrating "f**k the Corona virus parties" .... we're kind of grounded until June 1st. We're now only allowed to go outside the house if no family member has fever and only for doing necessary shopping and for a short walk (e....
by roland
Sun Mar 22, 2020 2:42 pm
Forum: acorn atom and system
Topic: My old Atom for you to see
Replies: 8
Views: 380

Re: My old Atom for you to see

I already contacted Chris by email, he will receive his Yarrb board within a few days.
by roland
Sun Mar 22, 2020 8:45 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 13 to 15 November 2020 - Save the Date - NOT A BOOKING THREAD
Replies: 12
Views: 463

Re: ABUG SOUTH 13 to 15 November 2020 - Save the Date - NOT A BOOKING THREAD

Thanks Jason, I'll keep that in mind. Flying to Stansted is quite easy from my place.
by roland
Sat Mar 21, 2020 7:05 pm
Forum: acorn atom and system
Topic: Re: ROM IC24 Acorn Atom #A000-#AFFF
Replies: 26
Views: 566

Re: ROM IC24 Acorn Atom #A000-#AFFF

WOW .... loading programs from leds .... cool :mrgreen:
by roland
Sat Mar 21, 2020 7:02 pm
Forum: acorn atom and system
Topic: 32k RAM , #0000 #7FFF
Replies: 8
Views: 245

Re: 32k RAM , #0000 #7FFF

Remarkable that this setup does not clash with the buffer IC4....

IIRC this bus driver is enabled for all addresses between #400 and #7FFF, excluding the lower memory area #2800-#3BFF. And it is enabled for the DOS ROM area #E000 - #EFFF.
by roland
Fri Mar 20, 2020 8:44 pm
Forum: upcoming and recent events & exhibitions
Topic: Computerclub Limburg kick-off meeting March 22 | CANCELLED
Replies: 11
Views: 695

Re: Computerclub Limburg kick-off meeting March 22 | CANCELLED

Indeed, but we don't give up. We'll have our retro computer club anyway :lol:

Now I'm just hoping that you don't have to cancel the Big Ben Club meeting as well. Maybe JudgeBeeb can attend as well since the Eurovision Contest is cancelled :(. But that's something for later and another topic.....
by roland
Fri Mar 20, 2020 1:28 pm
Forum: off-topic
Topic: Isolating myself - for three months !!!!!!!!!!!
Replies: 33
Views: 1302

Re: Isolating myself - for three months !!!!!!!!!!!

Here in Holland a lot of people, including politicians, don't seem to take it too serious. You can say that.... Yesterday I was out for a short walk with Misty (our dog) and I came across a group of twelve women, walking and talking together. Also groups of jogging people and a lot of people near e...
by roland
Wed Mar 18, 2020 1:20 pm
Forum: programming
Topic: zero page addresses help please
Replies: 14
Views: 514

Re: zero page addresses help please

If you really need more zero pages addresses you can also copy them to another block of memory and copy them back after your routine has finished. I did the same in a program for my Atom that might interact with basic and other stuff. So when I enter my routine I start copying the zero page addresse...
by roland
Tue Mar 17, 2020 7:17 pm
Forum: acorn atom and system
Topic: Atom Disk Pack
Replies: 3
Views: 143

Re: Atom Disk Pack

I'm glad that you didn't send it to the bin .... :D
by roland
Mon Mar 16, 2020 2:27 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 13 to 15 November 2020 - Save the Date - NOT A BOOKING THREAD
Replies: 12
Views: 463

Re: ABUG SOUTH 13 to 15 November 2020 - Save the Date - NOT A BOOKING THREAD

I'll save the date! Just because this might be the last "easy" trip to the UK. So I had a look how to travel from London Stansted to the Ely... Schermafbeelding 2020-03-16 om 15.19.32.png Excuse me .... 4 hours and 40 minutes ? By car it will take only 6 hours from home .... Schermafbeelding 2020-03...
by roland
Sun Mar 15, 2020 7:16 pm
Forum: introduce yourself
Topic: Hi from the Hague (NL)
Replies: 11
Views: 421

Re: Hi from the Hague (NL)

Hi Devnuller,

We have a few things in common:
1. The Atom was also my first computer
2. I also still have a fondness for old 8-bit computers
3. I also work in IT

:lol:

Welcome to this great forum, enjoy your visits here.

Greetings from the South of the Netherlands,
Roland
by roland
Sun Mar 15, 2020 5:14 pm
Forum: upcoming and recent events & exhibitions
Topic: Computerclub Limburg kick-off meeting March 22 | CANCELLED
Replies: 11
Views: 695

Re: Computerclub Limburg kick-off meeting March 22 | CANCELLED

Because of the Corona virus and the measures of the Dutch government, this meeting is cancelled. We will choose a new date as soon as possible.
by roland
Sat Mar 14, 2020 10:21 pm
Forum: acorn atom and system
Topic: Re: ROM IC24 Acorn Atom #A000-#AFFF
Replies: 26
Views: 566

Re: ROM IC24 Acorn Atom #A000-#AFFF

You don't happen to be an owner of a 2532 who is willing to burn that rom :D . I pay the costs. Since Corona is wandering around, we don't want to leave our homes. O yes, I am a happy owner of a few 2532's :lol: So I can burn one or two for you. I understand that you are anxious about leaving your ...
by roland
Sat Mar 14, 2020 9:32 pm
Forum: acorn atom and system
Topic: Re: ROM IC24 Acorn Atom #A000-#AFFF
Replies: 26
Views: 566

Re: ROM IC24 Acorn Atom #A000-#AFFF

Hi Jan,

If you want some 2532 programmed, I still have a programmer that can handle them. Just let me know if you want so.

Greetings,
Roland
by roland
Mon Mar 09, 2020 3:19 pm
Forum: introduce yourself
Topic: And yet another member from the Netherlands
Replies: 20
Views: 465

Re: And yet another member from the Netherlands

Well, that's not far from my neighbourhood. If you want to, just pop in at this event: viewtopic.php?f=25&t=18726
by roland
Sun Mar 08, 2020 10:50 pm
Forum: acorn atom and system
Topic: My old Atom for you to see
Replies: 8
Views: 380

Re: My old Atom for you to see

Don't worry about any data in the HM6116 .... There is nothing in it. The HM6116 is static cmos memory and its contents is gone directly after power off unless you have some battery backup implemented but that is not applicable here. So you can safely remove it and replace it by the AtoMMC rom. I al...
by roland
Sun Mar 08, 2020 5:27 pm
Forum: introduce yourself
Topic: And yet another member from the Netherlands
Replies: 20
Views: 465

Re: And yet another member from the Netherlands

janvb wrote:
Sun Mar 08, 2020 12:19 pm
Greetings from the south too :D
How far south? Ransdaal?

(for not Limburgers, this is a village in the very south of the Netherlands)
by roland
Sun Mar 08, 2020 9:08 am
Forum: introduce yourself
Topic: Hello from Hampshire
Replies: 24
Views: 484

Re: Hello from Hampshire

Hi Rich,

Welcome to this forum. Enjoy your visits here.

Greetings from the south of the Netherlands,
Roland
by roland
Sun Mar 08, 2020 12:00 am
Forum: introduce yourself
Topic: And yet another member from the Netherlands
Replies: 20
Views: 465

Re: And yet another member from the Netherlands

Wow, another Dutch member. Soon our TechSat will have as many attendees as British ABUGs so that we have to place people on a waiting list :lol:

Welcome Jan,

Enjoy your visits here,

Greetings from the South of the Netherlands,
Roland
by roland
Fri Mar 06, 2020 1:47 pm
Forum: upcoming and recent events & exhibitions
Topic: Computerclub Limburg kick-off meeting March 22 | CANCELLED
Replies: 11
Views: 695

Re: Computerclub Limburg kick-off meeting March 22

eelco108 wrote:
Fri Mar 06, 2020 1:07 pm
I wonder if my old car will make it that far north :wink:
:shock: In what area do you live?
by roland
Thu Mar 05, 2020 10:06 pm
Forum: general
Topic: Centre for Computing History, Cambridge
Replies: 14
Views: 551

Re: Centre for Computing History, Cambridge

daveejhitchins wrote:
Thu Mar 05, 2020 8:17 am
I'm sure the shortcut has been closed off by the council now.
That's right, in September last year it was cut off with a fence.
by roland
Thu Mar 05, 2020 10:01 pm
Forum: acorn atom and system
Topic: Foggy's Quest Acorn Atom Physical Tape!
Replies: 5
Views: 262

Re: Foggy's Quest Acorn Atom Physical Tape!

IMHO it's something between you (the publisher) and the authors of the game to agree if you want to make (commercial) tapes. I can understand that you cannot give the tapes away for free. Personally I am not interested in those tapes. Most AGD games are about 32K and that takes ages to load from a 3...
by roland
Sun Mar 01, 2020 11:11 pm
Forum: hardware
Topic: Issue 4 Electron - Won't power up
Replies: 20
Views: 581

Re: Issue 4 Electron - Won't power up

As I understand, the power supply might be ok: I measure +5v and -5v on the 3 pin connector on the motherboard..
by roland
Sun Mar 01, 2020 7:08 pm
Forum: hardware
Topic: Issue 4 Electron - Won't power up
Replies: 20
Views: 581

Re: Issue 4 Electron - Won't power up

I'd also reseat the 6502 and the ROM. If that does not help try to find out if the CPU is running by checking the SYNC pin, address and data lines with a scope (if you have one available).
by roland
Sun Mar 01, 2020 7:04 pm
Forum: acorn atom and system
Topic: TM1637 LED module and the Atom or 6502 in general
Replies: 2
Views: 267

Re: TM1637 LED module and the Atom or 6502 in general

On my Atom2k18 this module provides an irritating noise when the display is on. The noise decreases when the density of the display is lowered. I guess this is caused by the way the density is regulated. This causes a distortion on the power supply rail of the board. I added a 470uF capacitor betwee...