Search found 146 matches

by ThomH
Sun Aug 12, 2018 4:21 pm
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 89
Views: 31412

Re: Clock Signal — an Oric emulator for macOS and Linux

I am still having the same problem with NIB that has obstructed everybody that ever tried to come up with a disk to write them out to a real disk: the file format is just too much of a fiction. From an original disk it (i) removes all the sync bits; then (ii) adds a whole bunch of padding so that ea...
by ThomH
Sun Aug 05, 2018 11:23 pm
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 89
Views: 31412

Re: Clock Signal — an Oric emulator for macOS and Linux

It barely warrants the thread bump, but just to say: after pursuing that "it loads slowly" Apple II comment as referenced above I have come across the wisdom that asking a Disk II to disable the drive motor does so with a one-second delay. For now I've taken that to be a controller feature rather a ...
by ThomH
Fri Jul 06, 2018 3:19 pm
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 89
Views: 31412

Re: Clock Signal — an Oric emulator for macOS and Linux

Oh, yes, the Mac version doesn't display an error if it can't find its ROMs because there should be no way for it not to find its ROMs. But they're not in the repository. Unofficially, since they're in the releases, just grab the ROMImages folder from inside the application bundle and use it to repl...
by ThomH
Fri Jul 06, 2018 3:50 am
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 89
Views: 31412

Re: Clock Signal — an Oric emulator for macOS and Linux

For the record, I decided that I probably wouldn't have time to do much more before my upcoming trip, so I just pushed a new release . Therefore if you use the prebuilt Mac port, the various changes discussed above are now available to you; primarily the emulation of Pravetz 8DOS writing is much imp...
by ThomH
Thu Jul 05, 2018 7:48 pm
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 89
Views: 31412

Re: Clock Signal — an Oric emulator for macOS and Linux

Just for information and to be precise, Apple II's clock is 1.0205 Mhz (not 1.0250) (according Jim Sather's "Understanding the Apple II", THE reference.) My understanding is that there's 14.31818Mhz master crystal, which divides by four to give the standard NTSC 3.579545Mhz. For the CPU it's divide...
by ThomH
Tue Jul 03, 2018 2:00 pm
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 89
Views: 31412

Re: Clock Signal — an Oric emulator for macOS and Linux

Cool. I'll keep trying to come up with a rational way to handle NIBs as I push towards a new release. I see that the Apple II emulator microM8, which is another that has tried to support NIB while having a real hardware emulation, has rolled back its attempt to make NIBs look like real disks and jus...
by ThomH
Tue Jul 03, 2018 12:46 am
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 89
Views: 31412

Re: Clock Signal — an Oric emulator for macOS and Linux

Agreed; and besides the available processing, here in 2018 we have a much greater range of documentation, and: hindsight. Meanwhile, see attached image for progress. 196ms rather than exactly 200ms suggests a minor outstanding issue somewhere, which I'll look into, but I don't think it's a big deal....
by ThomH
Mon Jul 02, 2018 3:28 pm
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 89
Views: 31412

Re: Clock Signal — an Oric emulator for macOS and Linux

My understanding of the problem with disk images, even now that a lot of very clever people have a very thorough understanding of all the analogue issues and emulator authors tend to talk to one another, is that they can either be very large or not completely descriptive. Where 'very large' is large...
by ThomH
Fri Jun 29, 2018 7:20 pm
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 89
Views: 31412

Re: Clock Signal — an Oric emulator for macOS and Linux

Update on this: in the latest release I've found that the rotation test disks trip up the internal precision for modified disk tracks, leading the emulator to perform incorrectly. I've decided it's because I'm modelling them poorly. Hindsight shall be applied — I'm going to switch representations. T...
by ThomH
Fri Jun 29, 2018 1:40 am
Forum: Games
Topic: POP source code found (Prince of Princia)
Replies: 10
Views: 5170

Re: POP source code found (Prince of Princia)

Many games used animation sequences hardwired on multiple of 8, with gameplay tweaked so things happen on multiple of movements... and it must be particularly complex in Prince of Persia considering the number of pixel perfect jumps that are required. Minor observation: the Apple II has only seven ...
by ThomH
Mon Jun 11, 2018 8:53 pm
Forum: Emulators
Topic: JOric
Replies: 92
Views: 11085

Re: JOric

Cool! Immediate reactions: If you had a recognition engine, it might actually be possible to obtain icons from somewhere, at least as a first suggestion? Maybe the first screenshot from the linked oric.org entry? I also have to admit to being vague on the Android user interface guidelines, but if yo...
by ThomH
Sat Jun 09, 2018 7:28 pm
Forum: Emulators
Topic: JOric
Replies: 92
Views: 11085

Re: JOric

I don't really use either, but I have both a 2013 Nexus 7 and a Nexus 5X, should anything I could do with either be useful. Also I might still have BlueStacks installed on my older Mac, but quite possibly not. I seriously considered a Pixel C when it was heavily discounted but figured it'd just be o...
by ThomH
Thu Jun 07, 2018 4:01 pm
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 89
Views: 31412

Re: Clock Signal — an Oric emulator for macOS and Linux

Time is very tight this week, but things worth saying immediately: in a case of accidental fuzz testing, I discovered that the WOZs produced by dsk2woz were truncating track bit count to produce the byte count (WOZ stores both) rather than rounding up. Which caused my emulator to perform an out-of-b...
by ThomH
Wed Jun 06, 2018 8:03 pm
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 89
Views: 31412

Re: Clock Signal — an Oric emulator for macOS and Linux

Thanks for the small but very nice tool dsk2woz! I saw your announce on comp.sys.apple2 too :). It works well but ... back to Clock Signal - is currently Disk][ read-only or something with the write-protection switch is wrong? It was initially but that is supposed to be fixed. Well, partially fixed...
by ThomH
Wed Jun 06, 2018 2:14 pm
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 89
Views: 31412

Re: Clock Signal — an Oric emulator for macOS and Linux

No, I've never implemented saved states; sometimes I oscillate between popping up a warning to the user that they should let me resave their work as WOZ/FDI/as relevant in order best to preserve their changes, but actually none of those quite fully captures exactly everything — e.g. both assume a co...