Search found 266 matches

by Smonson
Sun Apr 07, 2019 11:26 pm
Forum: HARDWARE DISCUSSIONS
Topic: Project: HDMI/DVI out for STFM
Replies: 507
Views: 50527

Re: Project: HDMI/DVI out for STFM

No, just the one machine with a Blitter has the problem (The same one as before), I don't have any other Blittered machines I can test on because they have soldered in Shifters. Sorry if that wasn't clear, I'm half asleep! Gotcha. I didn't get a great night myself - nobody told the cat about the ru...
by Smonson
Sun Apr 07, 2019 11:24 pm
Forum: HARDWARE DISCUSSIONS
Topic: Sidequest: VGA scan doubler
Replies: 20
Views: 1241

Re: Sidequest: VGA scan doubler

Super nice well done! I assume your using the 32mhz shifter clock to sync the ripple counters to the video sampling ? Thanks Exxos! :D That's right, the counter that's addressing the RAM that's being read (twice) gets the 32MHz clock, and the counter for the RAM that's being written gets the clock ...
by Smonson
Sun Apr 07, 2019 11:21 pm
Forum: HARDWARE DISCUSSIONS
Topic: Sidequest: VGA scan doubler
Replies: 20
Views: 1241

Re: Sidequest: VGA scan doubler

As I don’t know shit about Atari this might be a stupid question, but would this be possible to adapt to the Amiga? What are the input signals? Maybe. I'm using the 32MHz master clock, the digital RGB signals (3 bits each) out of the shifter, and HSYNC. VSYNC might also be needed for better TV comp...
by Smonson
Sun Apr 07, 2019 11:12 pm
Forum: HARDWARE DISCUSSIONS
Topic: Project: HDMI/DVI out for STFM
Replies: 507
Views: 50527

Re: Project: HDMI/DVI out for STFM

Thanks for taking the time to test it out! If I understand, does that mean that you've seen that black-screen-when-opening-the-menu problem on two different machines with blitters?
by Smonson
Sun Apr 07, 2019 1:20 pm
Forum: HARDWARE DISCUSSIONS
Topic: Sidequest: VGA scan doubler
Replies: 20
Views: 1241

Re: Sidequest: VGA scan doubler

...actually one thing I forgot to mention. It does require a connection to HSYNC, which means soldering to a via near the GLUE. So it's not totally plug-and-play unfortunately.

Without HSYNC, it can't tell where to begin the scanlines.
by Smonson
Sun Apr 07, 2019 1:17 pm
Forum: HARDWARE DISCUSSIONS
Topic: Sidequest: VGA scan doubler
Replies: 20
Views: 1241

Re: Sidequest: VGA scan doubler

Yep, assuming that they have access to a monitor that can display a 50hz image via the VGA input. I'm assuming that many TVs would fall into that category but I've only tried one so far. Monitors are less likely to work. 😊
by Smonson
Sun Apr 07, 2019 12:46 pm
Forum: HARDWARE DISCUSSIONS
Topic: Sidequest: VGA scan doubler
Replies: 20
Views: 1241

Sidequest: VGA scan doubler

Hello, me again! So, I like to have several projects going at once, as you have probably guessed from my short attention span. I wanted to get started with small and very cheap FPGAs (as opposed to the huge and expensive Cyclones) so I picked up some MAX-Vs in my last Mouser order. These guys go all...
by Smonson
Mon Mar 25, 2019 12:11 pm
Forum: HARDWARE DISCUSSIONS
Topic: Project: HDMI/DVI out for STFM
Replies: 507
Views: 50527

Re: Project: HDMI/DVI out for STFM

The problem with skipping is knowing which ones to skip. It could also be caused by some other mechanism of course, an unknown unknown.

I've never looked at the suska source actually. Maybe I should learn VHDL.
by Smonson
Mon Mar 25, 2019 11:45 am
Forum: HARDWARE DISCUSSIONS
Topic: Project: HDMI/DVI out for STFM
Replies: 507
Views: 50527

Re: Project: HDMI/DVI out for STFM

That effect comes from the ST and shifter being out of sync with each other. The shifter only gets reset at boot time, when the internal registers are cleared, and after that if it receives an extra LOAD it gets out of sync like this and stays that way until the next reset when it should go back to ...
by Smonson
Tue Mar 19, 2019 11:32 am
Forum: HARDWARE DISCUSSIONS
Topic: Project: HDMI/DVI out for STFM
Replies: 507
Views: 50527

Re: Project: HDMI/DVI out for STFM

That's fancy, I just use my fingers :lol: