Search found 3376 matches

by roland
Sun Nov 10, 2019 4:25 pm
Forum: hardware
Topic: ROM Burner/Programmer
Replies: 7
Views: 280

Re: ROM Burner/Programmer

How many eproms do you need?

I even have a simple 27128 eprom programmer for the BBC (user port iirc). But you didn’t ask for that...
by roland
Fri Nov 08, 2019 10:42 pm
Forum: off-topic
Topic: E-Bay Complaint
Replies: 17
Views: 489

Re: E-Bay Complaint

:lol: =D>
by roland
Fri Nov 08, 2019 3:40 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1590

Re: Yarrb - redesigned

I do agree that you can practise smd soldering IF you can see what you are doing and you have the right equipment. On the other side I can also understand that there are members here that even have trouble with soldering normal through-hole components but still want to buy a new board. I sometimes g...
by roland
Thu Nov 07, 2019 10:34 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1590

Re: Yarrb - redesigned

Good news: I have ordered the first ten boards at PCBway, now let's hope they work [-o<

After all, they charge only $30 for assembling those 10 boards, which is $3 per board. I cannot do that myself for that price.
The price will be lower than Allpcb, however I have to wait what the taxes will be.
by roland
Thu Nov 07, 2019 10:30 pm
Forum: acorn atom and system
Topic: YARRB [SOLD OUT]
Replies: 265
Views: 16678

Re: YARRB [SOLD OUT]

I have never tried a W65C02S6TPG-14 on a Yarrb board or an Atom2k15. I copied the jumpers and resistors from another RAM/ROM board. When I have to order some new components I will order such a CPU and test it, to see if I can get it working. But like you said, it is probably not worth the trouble be...
by roland
Tue Nov 05, 2019 4:35 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1590

Re: Yarrb - redesigned

I asked for a quotation at PCBway. Naturally they have other specifications for the BOM and CPL files :? So I might reconstruct them again. Luckily there are only 41 SMD components on the board :lol: The speed of the board will be limited by the 6502, 6522 and 8255. So probably it will run at 1 or 2...
by roland
Mon Nov 04, 2019 9:47 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1590

Re: Yarrb - redesigned

Today I got my quotation for the Yarrb2 board and assembling the SMD components. Without the LED's (those are out of stock), the price is about €420,00 including VAT and import taxes for ten boards. And then you still have not all components (e.g. the EEPROM, voltage regulator and headers) so the co...
by roland
Sat Nov 02, 2019 12:54 pm
Forum: general
Topic: On This Day
Replies: 5
Views: 283

Re: On This Day

I don't exactly remember the date but is was in the first week of November 1983 that I bought my first computer: an Acorn Atom with a little extra RAM. The price was hfl 239.00 (about €108.00) and after that I invested many more guilders and euros in it :lol: I had worked five weeks during my summer...
by roland
Fri Nov 01, 2019 10:26 pm
Forum: hardware
Topic: Cable 3810 MC Tape System
Replies: 1
Views: 121

Cable 3810 MC Tape System

One of you might also have such a tape recorder for the Electron or Beeb .... if so, can somebody post the diagram of the cable?
Acorn Electron.JPG
by roland
Thu Oct 31, 2019 12:45 pm
Forum: wanted
Topic: WTB Acorn Electron computer
Replies: 2
Views: 120

Re: WTB Acorn Electron computer

Do you want one with our without a Plus-1? I'll ask around on our monthly Atom User Group meeting tomorrow.
by roland
Wed Oct 30, 2019 8:09 am
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1590

Re: Yarrb - redesigned

Another supplier like "Allpcb" is not an option ? Yes, see my post at Tue Oct 29, 2019 10:31 pm :mrgreen: It's actually surprisingly easy with some practice. I've soldered a couple of hundred 0.5mm QFP and TSOP parts in this past year without ever terminally messing one up, despite bad eyesight and...
by roland
Tue Oct 29, 2019 9:31 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1590

Re: Yarrb - redesigned

I was playing with the calculator at PCBGOGO.com. Assembling 5 - 15 of these boards costs only $50. Adding 5 more raises the costs to $145 :shock: It looks like it's much cheaper to order 2 x 10 boards than 1 x 20 boards. Parts not included. The calculator at allpcb.com looks very similar to the one...
by roland
Tue Oct 29, 2019 8:41 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1590

Re: Yarrb - redesigned

I got an answer from JLC: Actually that depends on the demand for this part XC95144XL is high or low . If it's high demand,then I believe we will purchase this part soon. If low demand,I think there won't be purchasing plan recently. So actually, you can never be sure if any non-standard component i...
by roland
Tue Oct 29, 2019 8:26 pm
Forum: general
Topic: Today I received.....
Replies: 5484
Views: 440375

Re: Today I received.....

A new storage for mi bits and bytes....
storage.jpg

Edit: I hate it when the picture is rotated.....
by roland
Tue Oct 29, 2019 4:43 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1590

Re: Yarrb - redesigned

This could be a realistic approach but I have to investigate the total height of a Yarrb (which is already a daughterboard on the Atom's main board) and then another CPLD board on top of that. On the other hand, creating a small board with 40 - 50 pins and a SMD chip can also be a challenge. I'll ha...
by roland
Tue Oct 29, 2019 3:57 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1590

Re: Yarrb - redesigned

That's really annoying for you.... and not a goot advertisement for those of us considering this service. Indeed. When I picked this part it was plenty on stock. I don't remember how much but it seemed more than enough. There was no notice like "Don't use this part because it is discontinued". FYI,...
by roland
Mon Oct 28, 2019 10:16 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1590

Re: Yarrb - redesigned

Lcsc even mentions that this cpld is discontinued. I'll ask them if they will continue the 144 for at least a year or so. If so then I can redesign it for the time being.....

Another option is to use a 72 but then it is not very useful as a stand-alone board.
by roland
Mon Oct 28, 2019 9:12 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1590

Re: Yarrb - redesigned

:evil: :evil: Today I got an email from JLC that there is not much demand for the XC95288XL and that there won't be any supply on short term. So I have to check if my board can be redesigned with an '144 ( probably with the same risk of getting no components ) or find another manufacturer :( I don't...
by roland
Sat Oct 26, 2019 10:27 pm
Forum: other vintage computer hardware, software and games
Topic: How to...on a Commodore 64
Replies: 17
Views: 429

Re: How to...on a Commodore 64

Pernod wrote:
Sat Oct 26, 2019 8:55 pm
POKE 53281,x (where colour x=0 to 15)
unbelievable that a computer with such a way of changing colours was (and still is) so popular.... #-o
by roland
Fri Oct 25, 2019 9:52 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1590

Re: Yarrb - redesigned

My intention is to have a first batch of 10 boards just in case there is something wrong with the design despite all our good care.

I see that the XC95144XL cpld is available again and I hope the 288 will follow soon. JLC will notify me if there are new ones in stock.
by roland
Fri Oct 25, 2019 10:53 am
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1590

Re: Yarrb - redesigned

#MeToo :lol:

I wanted to order the boards yesterday but they have run out of stock for the CPLD so I could not place my order. I will make a short description about the design and ordering process once I have place my order.
by roland
Fri Oct 25, 2019 9:05 am
Forum: general
Topic: Today I received.....
Replies: 5484
Views: 440375

Re: Today I received.....

duikkie wrote:
Fri Oct 25, 2019 7:26 am
normaly they are bleu ?
Yes, if you buy them from Elektor they are blue but Elektor also publishes the pcb layout so you can make them yourself at home. It worked nice for simple boards. For Yarrb2 it would probably not be possible :mrgreen:
by roland
Thu Oct 24, 2019 8:46 pm
Forum: general
Topic: Today I received.....
Replies: 5484
Views: 440375

Re: Today I received.....

duikkie wrote:
Thu Oct 24, 2019 6:27 am
DIY PROJECT from which book ? ( elektor/elektuur?) , pc ??
Elektor normally has an EPS number on the printed circuit board, even if it is home made. So, if there is no such number at the back side of the board then I'd advise to skip the Elektor magazines.
by roland
Thu Oct 24, 2019 8:35 pm
Forum: acorn atom and system
Topic: Atom Tube Interface
Replies: 217
Views: 19302

Re: Atom Tube Interface

Pin 1 should be at the "edge side" of the printed circuit board and pin 32 should be next to the printer connector. The upper position should be the right one. I don't have exactly the same connector so just double check the pin numbers.
by roland
Tue Oct 22, 2019 8:38 pm
Forum: hardware
Topic: PSU for Atom
Replies: 16
Views: 392

Re: PSU for Atom

Does it mean I have to bridge the 2 points left to LK6? Or does my system need 8V? Yes, you have to bridge those two points, and you have to do the same with the two points next to LK7. After you made these bridges, USE A 5V POWER SUPPLY . If you do not make the bridges you need an 8V power supply ...
by roland
Tue Oct 22, 2019 8:19 pm
Forum: hardware
Topic: PSU for Atom
Replies: 16
Views: 392

Re: PSU for Atom

And if the links are fitted, press break a few times and then press CTRL+G , do you hear a short beep? Now that I zoom into one of your pictures it looks like the links are not fitted. I see a small white line next to the LK6 label. You want to fix that in the first place..... Schermafbeelding 2019-...
by roland
Tue Oct 22, 2019 10:25 am
Forum: acorn atom and system
Topic: Atomic Linux
Replies: 10
Views: 259

Re: Atomic Linux

(Atom2K18 includes a header for the Pi, which amongst other things connects the Pi's serial lines to the Atom2K18's UART) This is not hard wired on the PCB because that would make the serial lines unusable for other experiments and projects. You can see how I did this in the picture below: IMG_3960...
by roland
Tue Oct 22, 2019 8:38 am
Forum: acorn atom and system
Topic: Atomic Linux
Replies: 10
Views: 259

Re: Atomic Linux

What Linux distribution do I need on the Pi Zero? I installed a normal Raspbian without graphical environment. IMHO you can use any available distro as long as you can enable the serial console. I also wrote a small loading program on the Atom that I will post this evening. I am assuming this is ve...
by roland
Tue Oct 22, 2019 8:23 am
Forum: upcoming and recent events & exhibitions
Topic: Re: ABUG Canada West Nov 19 2019 Meetup #15
Replies: 6
Views: 282

Re: ABUG Canada West Nov 19 2019 Meetup #15

At ABUG UK there are more visitors who distract you :lol:
by roland
Tue Oct 22, 2019 6:43 am
Forum: acorn atom and system
Topic: Atomic Linux
Replies: 10
Views: 259

Re: Atomic Linux

I must admit that I never searched on Google for "Atomic Linux", but if I do now my video shows up as the first result :mrgreen:
Maybe Linux@Atom is a better name for the project however that combination also shows up as the Atom editor on Linux. We have a tough hobby....