Aha, right, I see what you mean. Sync looks good in your photos. It's only blank that needs to be disconnected. If you can't disconnect blank on the H5 then it will probably at least work for monochrome.
Search found 555 matches
- Thu Dec 31, 2020 2:47 pm
- Forum: HARDWARE DISCUSSIONS
- Topic: Sidequest: VGA scan doubler
- Replies: 222
- Views: 93801
Re: Sidequest: VGA scan doubler
- Thu Dec 31, 2020 1:59 pm
- Forum: HARDWARE DISCUSSIONS
- Topic: Sidequest: VGA scan doubler
- Replies: 222
- Views: 93801
Re: Sidequest: VGA scan doubler
That's odd, if you've disconnected the original blank signal from the glue chip, it should look fine. The black comb down the left side, I assume, is the original horizontal blank, kicking in at the start of every second line where the old hsync was.
- Thu Dec 31, 2020 12:23 pm
- Forum: HARDWARE DISCUSSIONS
- Topic: Sidequest: VGA scan doubler
- Replies: 222
- Views: 93801
Re: Sidequest: VGA scan doubler
Well. At least the picture quality seems good! The first one looks like you've got the doubled video data, but with the old 15KHz HSYNC timing. The second one seems better, I take it you haven't disconnected BLANK - if you lift that resistor and tie the loose end to +5v it should fix that, I think (...
- Thu Dec 31, 2020 2:42 am
- Forum: HARDWARE DISCUSSIONS
- Topic: Sidequest: VGA scan doubler
- Replies: 222
- Views: 93801
Re: Sidequest: VGA scan doubler
Cool, congrats on the B1
Check my preliminary instructions on smonson.com (third bullet off the front page, I forgot to fix the direct link, sorry!)
EDIT: Fixed the linking bug, the instructions are here.
- Fri Oct 23, 2020 1:06 pm
- Forum: HARDWARE DISCUSSIONS
- Topic: Sidequest: VGA scan doubler
- Replies: 222
- Views: 93801
Re: Sidequest: VGA scan doubler
Yeah, I saw that! Looks like you guys are pretty close to having your H5s up and running too! Pretty cool
I can make specific H5 versions of the PCB eventually also.
I can make specific H5 versions of the PCB eventually also.
- Fri Oct 23, 2020 8:15 am
- Forum: HARDWARE DISCUSSIONS
- Topic: Sidequest: VGA scan doubler
- Replies: 222
- Views: 93801
Re: Sidequest: VGA scan doubler
The other jumper connection that was spare will be to disable the mod and return the ST to its original workings (albeit with a longer analogue signal path). It'll still fit into the FPGA. Basically it just works the same as the 71.2Hz mode and passes the hsync and vsync through untouched, but with ...
- Wed Sep 30, 2020 6:10 am
- Forum: ELECTRONICS
- Topic: 3.3v->5v 7 signals
- Replies: 6
- Views: 2813
Re: 3.3v->5v 7 signals
I've been using 74AHCT245As for my VGA mod, since they only cost AUD 50c each and they do the job. If you only need a single-directional driver they work the same as the 244s (I just tie DIR to ground).
- Wed Sep 02, 2020 2:57 am
- Forum: NEWS & ANNOUNCEMENTS
- Topic: EmuTOS 1.0
- Replies: 25
- Views: 12570
Re: EmuTOS 1.0
Nice one! Congratulations on the milestone release!
- Wed Sep 02, 2020 12:19 am
- Forum: HARDWARE ISSUES
- Topic: stfm problem
- Replies: 6
- Views: 2650
Re: stfm problem
What's interesting to me is that There seems to be a palette in the shifter, which would suggest that it's at least running the first bit of code from ROM The pattern isn't repeating every 16 pixels, but every 80 pixels. That's interesting because it's not a power of 2 I'd also check the MMU is seat...
- Thu Aug 20, 2020 2:28 pm
- Forum: ELECTRONICS
- Topic: New magnifier
- Replies: 17
- Views: 6693
Re: New magnifier
That is excellent. I think you've just invented a must-have electronics tool.