Search found 94 matches

by ThomH
Thu Apr 05, 2018 3:49 pm
Forum: Emulators
Topic: Oricutron and Mac Sierra and High Sierra
Replies: 15
Views: 1732

Re: Oricutron and Mac Sierra and High Sierra

and you can virtualise old versions of OS X going back to 10.4 which was the first version on this side of the Intel transition. In my (somewhat limited) experience, running OSX in a VM was good enough for normal applications, but it gave terrible performance for games or anything relying heavily o...
by ThomH
Thu Apr 05, 2018 3:01 pm
Forum: Emulators
Topic: Oricutron and Mac Sierra and High Sierra
Replies: 15
Views: 1732

Re: Oricutron and Mac Sierra and High Sierra

Sorry, to be clearer about prejudice: my day job for almost a decade was iOS development, both in iOS-first organisations where everything tended to be smooth and easy and in the furthest possible thing you can get from an iOS-first organisation, where there was a natural desire to plug iOS developm...
by ThomH
Tue Apr 03, 2018 3:51 pm
Forum: Emulators
Topic: Oricutron and Mac Sierra and High Sierra
Replies: 15
Views: 1732

Re: Oricutron and Mac Sierra and High Sierra

It might say more about my abilities than anything else, but I find that keeping up to date with Xcode is a worthwhile aim in itself just because the surrounding tooling is always improving. E.g. the latest version of the runtime analysis tools pointed out the undefined behaviour in (heavily simplif...
by ThomH
Sat Mar 31, 2018 9:39 pm
Forum: Emulators
Topic: JOric
Replies: 46
Views: 1527

Re: JOric

I think most fairly, it is designed to be memory mapped, but to a CP1610, which has a multiplexed bus. So the extra level of indirection on most machines is implemented just because it's the easiest way of dealing with that.
by ThomH
Thu Mar 29, 2018 6:50 pm
Forum: Emulators
Topic: JOric
Replies: 46
Views: 1527

Re: JOric

Unfortunately I don't think there's a quick shortcut to test disk titles because many of them, if not most, talk to the controller directly. I would dare imagine you can implement your WD to jump directly to any requested sector and stream its bytes exactly as the CPU reads them but the Oric disk fi...
by ThomH
Thu Mar 29, 2018 6:09 pm
Forum: Games
Topic: Wolfenstein / DOOM for Oric : has this been done?
Replies: 15
Views: 764

Re: Wolfenstein / DOOM for Oric : has this been done?

Do you have pointers to what you call run-slice? I assume you are referring to a particular algorithm but a cursory search does not give any useful results. Oh, sorry — it's actually the much lesser-seen Bresenham algorithm. Much easier to derive though: If the target line is (x, y) and, for agumen...
by ThomH
Wed Mar 28, 2018 8:35 pm
Forum: Games
Topic: Wolfenstein / DOOM for Oric : has this been done?
Replies: 15
Views: 764

Re: Wolfenstein / DOOM for Oric : has this been done?

I guess you could use a small window and squeeze a double buffer into text mode, but I guess then you're probably at 64x48 or somewhere around that? I strongly suspect that's the equivalent of what the Vic Doom is doing, from looking at the window size. Otherwise all I can think of is keeping the wa...
by ThomH
Wed Mar 28, 2018 8:03 pm
Forum: Games
Topic: Wolfenstein / DOOM for Oric : has this been done?
Replies: 15
Views: 764

Re: Wolfenstein / DOOM for Oric : has this been done?

Haha, so the amount of time I spent persuading myself that it's really a multiply by cosine rather than a divide was actually a substantial proportion of the original time spent on the demo!

I should spend my time firing up an assembler rather than drawing pictures.
by ThomH
Wed Mar 28, 2018 7:22 pm
Forum: Games
Topic: Wolfenstein / DOOM for Oric : has this been done?
Replies: 15
Views: 764

Re: Wolfenstein / DOOM for Oric : has this been done?

I assume that it's not all that helpful to make the standard recommendations? don't associate angles one-to-one with screen columns — build a table of casting angle per column slice as an offset from the centre ahead of time as a function of atan, because you're solving for the angle inside a right-...
by ThomH
Wed Mar 28, 2018 5:16 pm
Forum: Games
Topic: Wolfenstein / DOOM for Oric : has this been done?
Replies: 15
Views: 764

Re: Wolfenstein / DOOM for Oric : has this been done?

I've not seen one. I definitely think something like that would be easily within the Oric's scope, and as to reproducing Doom in the sense that the other 8-bit versions do, the algorithm isn't even that hard I think: they don't do variable height sectors and the Spectrum Doom in particular is heavil...
by ThomH
Tue Mar 27, 2018 2:56 pm
Forum: Emulators
Topic: Steam/GOG
Replies: 11
Views: 4680

Re: Steam/GOG

That probably raises some questions about the Microdisc ROM, and similarly might lead to the same queries re: the Jasmin or any other disk system you've provided a compatible boot sector for, but it would substantially reduce the list of potentially interested parties. If it definitively removed any...
by ThomH
Mon Mar 26, 2018 6:01 pm
Forum: Emulators
Topic: Steam/GOG
Replies: 11
Views: 4680

Re: Steam/GOG

I agree that this would be ideal from a non-technical user standpoint. I've ticketed it for myself, which generally means it'll get done because I'm loathe to close those things without resolving the underlying problem. Isn't the copyright on the Oric boot screen referencing only Tangerine and not ...
by ThomH
Mon Mar 26, 2018 2:45 pm
Forum: Emulators
Topic: JOric
Replies: 46
Views: 1527

Re: JOric

dreamseal wrote:
Sun Mar 25, 2018 11:22 pm
I'm going to be busy playing these games now rather than working on the emulator. :D
That's how you know you're doing a good job!
by ThomH
Sat Mar 24, 2018 12:34 am
Forum: Emulators
Topic: JOric
Replies: 46
Views: 1527

Re: JOric

I'm not catching bits so those titles would load more slowly. But anything that loads bytes will load quickly irrespective of whether it's TAP, CSW or whatever else. TAP isn't a special case. But emulators that aren't JOric aside: just byte catching will do for Stormlord, Impossible Mission and most...
by ThomH
Sat Mar 24, 2018 12:07 am
Forum: Emulators
Topic: JOric
Replies: 46
Views: 1527

Re: JOric

Cool! I followed the exact same route: from Vic-20 to Oric emulation. Probably being the person to have written what was until just now the most recent new Oric emulator, definitely don't hesitate to shoot over any questions if I can be any help. Top tips: Use the test ROM to be able quickly to test...