Search found 85 matches

by Smonson
Sat Jun 23, 2018 10:56 am
Forum: HARDWARE DISCUSSIONS
Topic: Project: HDMI/DVI out for STFM
Replies: 96
Views: 6127

Re: Project: HDMI/DVI out for STFM

Yep, the position shift matters if you want to use fullscreen no-borders mode, because it'll move the image slightly off the screen. It's relative to vsync now, but I think hsync and vsync are both generated from the same counters, so if I understand correctly the image is also moving around relativ...
by Smonson
Sat Jun 23, 2018 9:57 am
Forum: HARDWARE DISCUSSIONS
Topic: Project: HDMI/DVI out for STFM
Replies: 96
Views: 6127

Re: Project: HDMI/DVI out for STFM

New things today and yesterday: Added ESD protection to the DVI port Added connections for switches/jumpers to the PCB Added selectable aspect ratio (switch 1) - toggles between 640x400 and 720x400 with 40-pixel left/right borders (for widescreen TV) Added selectable borders on/off (switch 2) - chan...
by Smonson
Fri Jun 22, 2018 10:11 am
Forum: HARDWARE DISCUSSIONS
Topic: Project: HDMI/DVI out for STFM
Replies: 96
Views: 6127

Re: Project: HDMI/DVI out for STFM

I'm not quite done with the unavoidable side-project that is keeping me from working on this (80% through it), but I had enough time recently to add static electricity protection for the DVI socket and get a run of prototypes made. Just tested that new board tonight and it works fine.
by Smonson
Fri Apr 20, 2018 10:11 am
Forum: HARDWARE DISCUSSIONS
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 29
Views: 1662

Re: BLITTER RE-CREATION THOUGHTS

exxos wrote:
Thu Apr 19, 2018 11:23 am
I went for the cheapest 3.3V one which would work. No use going for a larger more expensive device.
I actually know so little about FPGAs... That's the cheapest one I've ever seen! Well outside silly devices without about 20 LEs that hardly seem worth the effort.
by Smonson
Thu Apr 19, 2018 10:50 am
Forum: HARDWARE DISCUSSIONS
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 29
Views: 1662

Re: BLITTER RE-CREATION THOUGHTS

You couldn't get it to work on the Cyclone-II? The EP2C5s I used for the shifter are only $25 each, and they should have way more LEs and pins than you need, and they're not BGA. Although they are fairly large.
by Smonson
Thu Apr 19, 2018 10:33 am
Forum: STFM
Topic: C103414 - STFM 4 x SMT DRAM
Replies: 7
Views: 202

Re: C103414 - STFM 4 x SMT DRAM

I don't know what those pads are for either, but I can tell you that the left side is connected directly to the data bus. That's where I installed my SIMM socket.

Image
by Smonson
Thu Apr 19, 2018 10:14 am
Forum: STFM
Topic: C103414 - STFM 4 x SMT DRAM
Replies: 7
Views: 202

Re: C103414 - STFM 4 x SMT DRAM

This is the one I've got. Those damn J-leaded chips! :pullhair:
by Smonson
Fri Apr 06, 2018 10:56 am
Forum: HARDWARE DISCUSSIONS
Topic: When is a ST not a ST anymore ?
Replies: 35
Views: 1484

Re: When is a ST not a ST anymore ?

I'm a lot more comfortable with real silicon parts, including FPGAs, than I am with "software solutions" running on some secondary computer device.

That said, I've got a thing translating the mouse protocol that is more powerful than the ST CPU, so my moral code is on very shaky ground.
by Smonson
Sun Apr 01, 2018 10:00 am
Forum: ELECTRONICS
Topic: Parts suppliers
Replies: 7
Views: 706

Re: Parts suppliers

For us antepodians: http://www.x-on.com.au/ (a Farnell knock-off in Perth with the most amazingly bad website, but you can save on postage) http://www.altronics.com.au/ (I think they ship from Perth too) http://www.taydaelectronics.com/ (Thailand) http://futurlec.com/ (Thailand) X-ON is the only one...
by Smonson
Tue Mar 27, 2018 6:32 am
Forum: 8 BIT CORNER
Topic: 2600 software programmers ?
Replies: 17
Views: 456

Re: 2600 software programmers ?

Way over my head. Any graphics programming on the 2600 is programming in "hard mode".