Search found 51 matches

by guus.assmann
Wed May 16, 2018 8:28 pm
Forum: PSU (power supplies)
Topic: Future PSU designs
Replies: 62
Views: 5554

Future PSU designs

Hello Exxos, If I see it right, there's 3 primary windings needed. Or maybe it can be done with 2. 3 windings: 115V, 115V and 10V. All series = 240V, 2 x 115V series for 230V, 2 x 115V parallel, obvious. Or maybe you can get away with 2 windings of 120V. Now if you have those windings made such that...
by guus.assmann
Thu Apr 19, 2018 10:25 pm
Forum: NEWS & ANNOUNCEMENTS
Topic: Lightning VME open Order
Replies: 34
Views: 2354

Re: Lightning VME open Order

Hello Tuxie,
Has my payment arrived?
BR/
Guus
by guus.assmann
Sat Mar 31, 2018 9:11 pm
Forum: NEWS & ANNOUNCEMENTS
Topic: Lightning VME open Order
Replies: 34
Views: 2354

Re: Lightning VME open Order

Hello,
Thanks, payment was made yesterday.
BR/
Guus
by guus.assmann
Thu Mar 29, 2018 8:57 pm
Forum: NEWS & ANNOUNCEMENTS
Topic: Lightning VME open Order
Replies: 34
Views: 2354

Re: Lightning VME open Order

Well, as I've mentioned before....
I want to buy one.
Please let me know what to pay and to whom. (Living in Netherlands... )

BR/
Guus
by guus.assmann
Wed Mar 21, 2018 8:50 pm
Forum: NEWS & ANNOUNCEMENTS
Topic: Lightning VME open Order
Replies: 34
Views: 2354

Re: Lightning VME open Order

Hello,

I would like to buy one as well.

BR/
Guus Assmann
by guus.assmann
Sun Mar 18, 2018 9:42 pm
Forum: HARDWARE ISSUES
Topic: MegaST 4 will not boot, but looks fine with diagnostics
Replies: 11
Views: 809

Re: MegaST 4 will not boot, but looks fine with diagnostics

Finally, I found some courage and inpiration.
And solved the problem.
Jumper W2 had a bad contact.
But it was hidden below the body of the part.
So there was no or a bad connection from the decoding chip to the Eprom.
The board works fine again.

BR/
Guus
by guus.assmann
Sat Feb 17, 2018 8:07 pm
Forum: CHAT FORUM
Topic: My weekend sorted...
Replies: 3
Views: 308

Re: My weekend sorted...

Google Mr Atari (Sijmen Schouten).
He may have a couple of games. (Understatement :) )
Have funwith the unit and games.
I think part of the attraction is that it needs some imagination.

BR/
Guus
by guus.assmann
Wed Jan 03, 2018 9:23 pm
Forum: HARDWARE ISSUES
Topic: MegaST 4 will not boot, but looks fine with diagnostics
Replies: 11
Views: 809

Re: MegaST 4 will not boot, but looks fine with diagnostics

Have replaced the sockets, now two quality sockets with round contacts are in.
Still with these it doesn't work either. :( :shock:

However it was a very good idea. :)
by guus.assmann
Mon Jan 01, 2018 9:12 pm
Forum: HARDWARE ISSUES
Topic: MegaST 4 will not boot, but looks fine with diagnostics
Replies: 11
Views: 809

Re: MegaST 4 will not boot, but looks fine with diagnostics

Hello, The working one has 120nS Eproms. I have yet not tested with faster 29F010 Flash, 90nS. Will do that as well. Of course this card has a Gal. 16V8 25LNC. I have tested with 6 Eproms, Tos 1.04NL in 200nS Eproms. Not ok. Then I took Tos 1.04UK in 6 Eproms 100nS. Also not ok. (Yes, I changed W2- ...
by guus.assmann
Sun Dec 31, 2017 2:07 pm
Forum: HARDWARE ISSUES
Topic: MegaST 4 will not boot, but looks fine with diagnostics
Replies: 11
Views: 809

Re: MegaST 4 will not boot, but looks fine with diagnostics

Hello, Ram test keeps working just fine. As does the floppy test. Replacing the CPU has not helped, and removing the blitter is not a solution. I've replaced MCU, Glue, DMA, Floppy controller and Blitter. Using the two-tosses (Exxos) also doesn't work. And the Shifter buffer doesn't help either. The...