Search found 110 matches

by mikeb
Thu Oct 17, 2019 6:14 pm
Forum: Painting tricks
Topic: HRC in the works
Replies: 30
Views: 699

Re: HRC in the works

mike: Is there a way to hack the display do disable the border blanking? If what you say is true, then we should see the start of the next line continuing until reaching the end of the line? Well, the only way I know would involve removing the lid of the ULA, while not damaging it, and then I could...
by mikeb
Wed Oct 16, 2019 4:51 pm
Forum: Painting tricks
Topic: HRC in the works
Replies: 30
Views: 699

Re: HRC in the works

The program pokes 28 (60 Hz HIRES display) in every cell in range #BF40-#BF67 and waits 500ms after each to allow ULA to "interpret" the attribute - the result is vertical frequency remains at 50Hz. Good, puzzled as to why, but good :) @mikeb : Does ULA really read memory during 40-63 ? If so, the ...
by mikeb
Tue Oct 15, 2019 6:12 pm
Forum: Painting tricks
Topic: HRC in the works
Replies: 30
Views: 699

Re: HRC in the works

I confirm ISS's test, on my Atmos poking alternatively 29 or 31 (decimal for 60Hz/50Hz graphics) in $BF47 or $BFE0 had no effect on the screen display, while it did when I poked in $BFDF. Same with 24 or 27 (60Hz/50Hz TEXT). That's good news, things would have been complicated if it did! That's goo...
by mikeb
Mon Oct 14, 2019 5:04 pm
Forum: Painting tricks
Topic: HRC in the works
Replies: 30
Views: 699

Re: HRC in the works

Pokeing 50Hz HIRES to #BFDF to try and ensure it stays in 50hz/Hires mode, presumably on the basis of "I saw that last, therefore that's what I'll use" may not work -- if you accidentally select hires/text modes through your packed data, then the ULA will switch back and forth between text and hires...
by mikeb
Sun Oct 13, 2019 5:38 pm
Forum: Painting tricks
Topic: HRC in the works
Replies: 30
Views: 699

Re: HRC in the works

... following with anticipation, as the ULA hardware mandates a switch to text mode for the last three lines text lines (Vertical Count of 200 or higher), so these will always be text.

Attributes cannot override this, if that's what you're trying to get an extra line of HIRES.
by mikeb
Mon Oct 07, 2019 4:33 pm
Forum: General Discussion
Topic: Oriclopedia: A series of videos on all things Oric
Replies: 23
Views: 1074

Re: Oriclopedia: A series of videos on all things Oric

as it is basically a badged plotter from an existing design. The mechanism is made by ALPS, and the existing design you mention may well be a SHARP branded design, e.g. Sharp MZ1P16 / MZ800 (although it was also rebadged for Casio, Canon, Atari, Commodore ....) and Tandy/Radio Shack had a CGP-somet...
by mikeb
Sun Oct 06, 2019 7:42 pm
Forum: General Discussion
Topic: Oriclopedia: A series of videos on all things Oric
Replies: 23
Views: 1074

Re: Oriclopedia: A series of videos on all things Oric

Well, the printer is fully addressable in X/Y coordinates with a 0.2mm accuracy, so it's just a matter of drawing horizontal lines in the right color, moving back and down a little bit, then draw another horizontal line. I don't recall if it was an Oric Owner or other type-in, but I recall trying a...
by mikeb
Thu Sep 26, 2019 4:39 pm
Forum: BASIC programming
Topic: cataloguing tapes
Replies: 22
Views: 1179

Re: cataloguing tapes

.. and pray it's not one of those listings that was knocked out on an unsuitable printer (some of the Oric Owner listings were like that, some goofball, er, golfball printer that was obsessed with inserting 1/2 and 3/4 signs and other non-ASCII characters in place of < > ... and with a typeface that...
by mikeb
Wed Sep 25, 2019 5:40 pm
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 51
Views: 2406

Re: New conversion algorithm

Thank you for the detailed explanation @Sam ! Trying to optimize the error over the whole picture, for every possible combination, is -- as you say -- brute force. It does seem that errors in failing to correctly dither (due to being forced to emit 6 pixels of FG or BG on an attribute/colour change)...
by mikeb
Tue Sep 24, 2019 5:08 pm
Forum: Painting tricks
Topic: Pictoric (was: New conversion algorithm)
Replies: 51
Views: 2406

Re: New conversion algorithm

It's more than impressive, it's almost some kind of magic trick. I feel I've missed an explanation of what exactly is going on here (all the focus earlier is on tweaking dithering algorithms to improve the output). I get that you can dither a full colour image down to a limited colour range (e.g. fo...
by mikeb
Sun Sep 22, 2019 5:37 pm
Forum: Technical questions
Topic: Telestrat failure?
Replies: 29
Views: 3289

Re: Telestrat failure?

Surgical spirit? Oh yes, that lives in the bathroom, not workshop/garage :) TBH I don't see much difference between that and meths. Both are mostly ethanol, with methanol added to (theoretically) make it unsuitable for drinking, and something like Bitrex (same reason), purple colourant/strong scents...
by mikeb
Sun Sep 22, 2019 5:25 pm
Forum: Games
Topic: Oric Games Trade
Replies: 11
Views: 1775

Re: Oric Games Trade

Some programs were really poor quality - of the type-in standard i.e no better than program found in the books. I find it a bit ironic that some of the worst software has become the most valuable. Well, I really must dig out my "Cascade: 50 Games For The Oric" tape then, as that fits the above desc...
by mikeb
Sat Sep 21, 2019 9:20 pm
Forum: Games
Topic: Manic Miner
Replies: 4
Views: 298

Re: Manic Miner

the amazing loading method! (block by block with error checking). As I recall, there was a distinctly non-Oric sounding "pure whistle" between each block. It also resisted the normal Oric copying software, e.g. ORICOPY, because that didn't know how to deal with the funny format :) (For backup purpo...
by mikeb
Tue Sep 17, 2019 5:08 pm
Forum: Technical questions
Topic: Telestrat failure?
Replies: 29
Views: 3289

Re: Telestrat failure?

I usually try isopropanol, methylated spirit, white spirit, paraffin, cellulose thinner (xylene/toluene) or mystery RS "Computer Solvent" in turn until something seems to dissolve :)

I'll add lighter fluid to the list!
by mikeb
Sat Sep 14, 2019 6:02 pm
Forum: Technical questions
Topic: Oric 1 with messy video problem
Replies: 11
Views: 520

Re: Oric 1 with messy video problem

I can see it only if, together with the s-video to scart cable, I'm keeping attached also the RF cable! Just on that point, it sounds like your lead is not connecting the ground connection through correctly, and you are "stealing" a ground connection using the RF/coax lead's shield, from Oric to th...