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That's the Jasmin, which is the only one the emulator doesn't currently cover — it's got only the Microdisc and Pravetz disk interfaces implemented. Though, honestly, I should probably throw the Jasmin in as clearly FT-DOS is Jasmin-specific and therefore there is currently Oric software the emulato...

I have the strong feeling that none of the Oric's operating systems use its hardware interrupt, since it's not all that useful — it primarily marks the end of an FDC instruction, but since the Oric doesn't use DMA for disk transfers there's never really much ambiguity. I guess it might be useful for...

My feelings on 'once in a blue moon', as an ex-pat: I've never heard an American say it in conversation; they definitely know what a blue moon is though, in the literal sense of the rare event, and have even named a successful beer after it; back in the UK it's prominently used at the start of a wel...

IPF support in Clock Signal would be a really useful thing, I think. I've so far deferred for two reasons: the library provided duplicates quite a lot of what Clock Signal already does, making its wholesale inclusion undesirable; and I tend to run from anything which has been overtly politicised. Th...

Your interpretation of this may differ from mine, but it looks like GDB doesn't obtain architecture information from the server, it has to be rebuilt for every architecture you want to debug. E.g. per https://docs.faircom.com/doc/knowledgebase/62424.htm "The gdb must be specially compiled to be awar...

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...

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 ...

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...

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...

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...

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...

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....

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...

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...

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 ...