exxos's Atari, Amiga & retro forum

PhilC wrote: 27 Jun 2019 21:12 I think I'd need to download 3 million windows 3.1 installation disks on 360k floppy first though right?

Thought there was a DOS version ? Or maybe it was in Qbasic...

I'm going to dig out a copy of commander keene over the weekend.

It'd be pretty easy to make a modern version of this board now, 1 NEC V30, a CPLD and a few caps and diodes.

Bit quiet on my blog lately thanks to real life getting in the way.

Thanks to exxos, been working on his VGA adaptor today. I did have two of the UBESwitch ones before and although they have more features I found them a little too fragile. I'd managed to break off the button on both and the headphone socket on another.

Granted, I was plugging it in and out quite frequently, so this didnt help.

Exxos has designed an adaptor that uses some through hole components and a simple jumper for mono / colour selection. This will make for a simpler, cheaper and more robust VGA adaptor.

Here's the nearly finished article, minus the headphone socket as I need to desolder one from an old radio on the shelf behind me.
The other difference between the UBE version and this one is that exxos has done away with the 3 RGB adjustment pots, which were a bit of a pain to get right. Instead exxos has used 3 voltage dividers to control the monitor brightness, ghosting, etc.

My job today has been to try a few different variations for the voltage dividers and hopefully we are somewhere near now.

Have a look below, not too shabby on my old NEC if I do say so myself.

:bravo: :coolpics:

Yeah the pots (now resistors) were set as high of brightness as I could get them before I got odd colour bleeding/ghosting issues. It was to much of a pain to adjust them anyway.

Looking very nice indeed! :dualthumbup:

New design looks good. The old one hide the floppy connector when it was used with a mega. Nice design!! :) :) :)

:bravo:


If I could actually find the bag of audio connectors I would send you one!

exxos wrote: 02 Aug 2019 22:07 :bravo:


If I could actually find the bag of audio connectors I would send you one!

Cool, thanks. Do you have a plan for a case yet? Btw, angled headers seem to work pretty well for the mono / colour jumper but might find a toggle switch that fits too.

PhilC wrote: 02 Aug 2019 22:47 Cool, thanks. Do you have a plan for a case yet? Btw, angled headers seem to work pretty well for the mono / colour jumper but might find a toggle switch that fits too.

No plans to do a case. Not even finished the RTC case yet :)

Ok, might add it to my list. Pink to match your monitor?