Search found 314 matches

by scarybeasts
Sat Apr 18, 2020 11:14 am
Forum: archive submissions
Topic: Starting an archive of HFE protected disc files
Replies: 63
Views: 2218

Re: Starting an archive of HFE protected disc files

seems beebjit does not like HFEv3 file format : BAILING: HFE v3 unknown opcode F3 maybe that to do with what you say marking up formatted region's. beebjit can handle most HFEv3 files; those are what it generates. Unformatted regions are handled by beebjit (needed for lots of Sherston titles), that...
by scarybeasts
Fri Apr 17, 2020 10:30 pm
Forum: archive submissions
Topic: Starting an archive of HFE protected disc files
Replies: 63
Views: 2218

Re: Starting an archive of HFE protected disc files

most work well converting from FSD to hfe came across a few that it would not convert :- VECTOR2-140.FSD BAILING: fsd file track no space for sector header and gap STARQUAKE.FSD BAILING: fsd sectors really cannot fit 013 Winter Olympiad 88.FSD BAILING: fsd sectors really cannot fit 056 Indoor Sport...
by scarybeasts
Fri Apr 17, 2020 7:57 am
Forum: archive submissions
Topic: Starting an archive of HFE protected disc files
Replies: 63
Views: 2218

Re: Starting an archive of HFE protected disc files

Please do create the archive, otherwise I'm happy to churn through a few FSDs if it'd help. :) Thanks for the encouragement, Daniel and Rich! I converted a bunch more. Here's the top level directory, with publisher names for the subdirectories: https://drive.google.com/drive/folders/140xzJarpb3HX04...
by scarybeasts
Thu Apr 16, 2020 11:34 pm
Forum: archive submissions
Topic: Starting an archive of HFE protected disc files
Replies: 63
Views: 2218

Re: Starting an archive of HFE protected disc files

To get started, I've converted and briefly checked the pre-Acornsoft Superior Software discs. You may find them here: https://drive.google.com/drive/folders/1I8I2rx9YO42iMpShG-GdFhTyF2gtUpz8 Feedback on whether they work for you or not is welcomed! Cheers Chris gave there all a go on my gotek the o...
by scarybeasts
Thu Apr 16, 2020 11:00 pm
Forum: 8-bit acorn emulators
Topic: New emulator: beebjit
Replies: 51
Views: 2176

Re: New emulator: beebjit

what does beebjit need to run? op my main pc it comes up wit the following:- F:\BBC\beebjit_win_0.9.0>beebjit.exe info:tape:rewind and the window for the emulator pops up very briefly and disappears (falls back to DOS) again but the emulator run fine on my laptop. Not sure what I am missing on my m...
by scarybeasts
Wed Apr 15, 2020 11:21 pm
Forum: 8-bit acorn emulators
Topic: New emulator: beebjit
Replies: 51
Views: 2176

Re: New emulator: beebjit

When you say AMD emulate pext, by what mechanism? Do you mean it is being executed in microcode that actually does a succession of shifts and ORs rather than proper parallel execution? Probably...? Hard to explain these numbers otherwise: http://i.imgur.com/tQVadpL.png Also: https://laatste.info/bb...
by scarybeasts
Wed Apr 15, 2020 11:15 pm
Forum: archive submissions
Topic: Starting an archive of HFE protected disc files
Replies: 63
Views: 2218

Re: Starting an archive of HFE protected disc files

HFE is sufficient fidelity if it can represent all aspects of the original disk, and can be used to generate a physical disk which is basically indistinguishable from the original (is this actually the case?). That's an interesting question. How indistinguishable do you want? :) I believe HFE can p...
by scarybeasts
Wed Apr 15, 2020 10:46 am
Forum: archive submissions
Topic: Starting an archive of HFE protected disc files
Replies: 63
Views: 2218

Re: Starting an archive of HFE protected disc files

some which were damaged enough to be barely readable the first time around. Sorry to reply twice, but I have to say this part is vaguely terrifying :-) If any of your "barely readable" discs are unusual or rare, I'm definitely a fan of @danielj shipping you a Greaseweazle. Put another way -- no nee...
by scarybeasts
Wed Apr 15, 2020 10:22 am
Forum: archive submissions
Topic: Starting an archive of HFE protected disc files
Replies: 63
Views: 2218

Re: Starting an archive of HFE protected disc files

Greaseweazle is by-and-large the cheapest and easiest. Plug in beeb drive, attach to PC and away you go. How long does Greaseweazle take to create an image of a 40 and/or 80 track disk? I've imaged around 1250 titles, some with multiple disks, some which I no longer have, some which were damaged en...
by scarybeasts
Tue Apr 14, 2020 10:05 pm
Forum: archive submissions
Topic: Starting an archive of HFE protected disc files
Replies: 63
Views: 2218

Re: Starting an archive of HFE protected disc files

Banging my old drum :) I would suggest in order of preference, for new images, capturing a flux image (either kryoflux or greaseweazle or whatever), HFE, and finally FSD. I agree it'd be nice to have flux captures. In the interests of picking the solution with the most open software / hardware / to...
by scarybeasts
Tue Apr 14, 2020 12:58 pm
Forum: archive submissions
Topic: Starting an archive of HFE protected disc files
Replies: 63
Views: 2218

Starting an archive of HFE protected disc files

Hi, Working with @billcarr2005, I'm starting to convert his large library of FSD protected beeb disc files to HFE files. Why HFE? 1) HFEv3 files are capable of accurately representing all currently-known copy protection methods used on the beeb. 2) HFE is a simple, standard disc format. There is goo...
by scarybeasts
Tue Apr 14, 2020 12:12 pm
Forum: 8-bit acorn emulators
Topic: New emulator: beebjit
Replies: 51
Views: 2176

Re: New emulator: beebjit

I still love the irony that Kevin Edwards' Nightshade protection system -- which superficially one would think would be something that would make preservation efforts more difficult -- instead ended up accidentally becoming the go-to acid test for emulation accuracy. Rest assured, Kevin Edwards' na...
by scarybeasts
Tue Apr 14, 2020 6:37 am
Forum: 8-bit acorn emulators
Topic: New emulator: beebjit
Replies: 51
Views: 2176

Re: New emulator: beebjit

You're a little lucky beebjit runs at all. I think 4th gen (as you have here) is the first generation to have some of the more esoteric x64 instructions that beebjit uses. I'm not so lucky, I think. The built-in tests fail: unusual:video:horizontal total: 1 Program received signal SIGILL, Illegal i...
by scarybeasts
Tue Apr 14, 2020 6:11 am
Forum: 8-bit acorn emulators
Topic: New emulator: beebjit
Replies: 51
Views: 2176

Re: New emulator: beebjit

I should just note for science that I had to edit the build shellscripts to remove -Werror in order to get it to build. I'm not sure what my default gcc on here is. EDIT: gcc (Debian 9.3.0-8) 9.3.0.t I fixed a few compile warnings (== errors) on my Ubuntu 19.10 install, under both gcc and clang. Th...
by scarybeasts
Tue Apr 14, 2020 2:50 am
Forum: 8-bit acorn emulators
Topic: New emulator: beebjit
Replies: 51
Views: 2176

Re: New emulator: beebjit

Yay, overclocking. I wonder whether Intel (knowing that tasks like video and gaming are becoming the dominant performance case) have chosen to target floating-point performance over integer in newer generations of their CPUs (I assume this does basically no floating point work). I wish I knew more ...
by scarybeasts
Tue Apr 14, 2020 1:26 am
Forum: 8-bit acorn emulators
Topic: New emulator: beebjit
Replies: 51
Views: 2176

Re: New emulator: beebjit

Thought it might be interesting to give CLOCKSP a try on my box -- an aging Intel i7-4790K which is nevertheless overclocked to the same 4.5 GHz as the i9 mentioned on the blog. Thanks! It's great to see this running on peoples' machines other than mine. Is that with the command line in the EXAMPLE...
by scarybeasts
Mon Apr 13, 2020 11:23 pm
Forum: 8-bit acorn emulators
Topic: New emulator: beebjit
Replies: 51
Views: 2176

New emulator: beebjit

Hi, I'd like to announce a new BBC model B emulator, beebjit. It's an open source project, hosted on GitHub: https://github.com/scarybeasts/beebjit/ The README, which goes into a broad overview, is here: https://github.com/scarybeasts/beebjit/blob/master/README I did a technical blog post overview o...
by scarybeasts
Tue Apr 07, 2020 8:06 am
Forum: 8-bit acorn emulators
Topic: Latest version of BeebEm
Replies: 66
Views: 8193

Re: Latest version of BeebEm

But, the problem this new change introduces is that Elite and Revs now show glitches. These games both use interlace sync mode, whereas Scramble uses normal (non-interlaced) sync mode, so the next fix needed (I think) is the half-line VSync timing adjustment. The relevant code in JSBeeb is here: ht...
by scarybeasts
Sat Apr 04, 2020 5:05 am
Forum: stardot FORUM
Topic: Stairway to Hell is Ended
Replies: 34
Views: 6549

Re: Stairway to Hell is Ended

Arcadian wrote:
Thu Apr 02, 2020 10:42 am
Hey I've just realised, yesterday was the 10th anniversary of Stairway to Hell's closure (and exactly 21 years since it was founded).
I still use it to grab things to test. Thanks for all your effort -- historic and current, it's much appreciated!


Cheers
Chris
by scarybeasts
Sat Apr 04, 2020 1:05 am
Forum: 8-bit acorn software: classic games
Topic: Repton 3: Emulator/RNG issue
Replies: 76
Views: 2972

Re: Repton 3: Emulator/RNG issue

It would be useful if there was a quick and simple way of identifying whether a copy has this bug fixed or otherwise. I have original floppy copies of Repton 3, ATWIFS, LOR and RTT, so would be interesting to see if they have the bug. I wonder if any of the existing disc tool software can output so...
by scarybeasts
Fri Apr 03, 2020 7:41 am
Forum: 8-bit acorn software: classic games
Topic: Repton 3: Emulator/RNG issue
Replies: 76
Views: 2972

Re: Repton 3: Emulator/RNG issue

The initial delay before the fungus seems right, I think that came at the request of Steve Botterill who found that if you had a screen with a lot of fungus to start with then it was on your case straight away. He wanted a fungus delay at the screen start so as not to make it too difficult. IIRC th...
by scarybeasts
Sun Mar 29, 2020 5:10 am
Forum: 8-bit acorn hardware
Topic: Display issue on my spare beeb
Replies: 16
Views: 1199

Re: Display issue on my spare beeb

It was supposed to be a drop-in replacement, but the early ones (VC2023) had a problem in that they didn't correctly switch settings between teletext and non-teletext modes. To fix that, you had to remove a jumper (S26) and solder a small wire between the VidProc pin 27 (=centre of S26) and one of ...
by scarybeasts
Thu Mar 26, 2020 9:29 am
Forum: archive issues
Topic: Resolved: on-disc data for Tynesoft 5-sector tracks
Replies: 2
Views: 322

Resolved: on-disc data for Tynesoft 5-sector tracks

Hi, [Splitting out from the FSD archiving mega thread: https://stardot.org.uk/forums/viewtopic.php?f=6&t=18668] Finally got my hands on a Tynesoft title with the "interesting" protection -- Winter Olympiad. It has the 5-sector tracks with sectors of 1024, 1024, 512, 256 and 128 bytes. An open questi...
by scarybeasts
Thu Mar 26, 2020 6:05 am
Forum: archive issues
Topic: Archive of FSD files?
Replies: 101
Views: 3488

Re: Archive of FSD files?

hi Chris, thanks for indepth details of the must be protected *early* disc 8) (as BillC has not confirmed from pg2 :shock: ) your point 4 gave the game away, as mine is a flippy (40 on sideA, 80 sideB) so hence does not need to check for a 40 or 80T drive :idea: here is mine copied using UPURS, jus...
by scarybeasts
Sun Mar 22, 2020 12:38 am
Forum: 8-bit acorn hardware
Topic: VideoNuLA and 6845 questions
Replies: 15
Views: 726

Re: VideoNuLA and 6845 questions

amb5l wrote:
Sat Mar 21, 2020 8:44 pm
@scarybeasts thanks for the lead, I will look at your JS emulator. Am aware of visual6502 and am suitably impressed!
Note that jsbeeb was written by Matt Godbolt, not me. I contributed, including video emulation accurately, later on.


Cheers
Chris
by scarybeasts
Sat Mar 21, 2020 12:06 am
Forum: 8-bit acorn hardware
Topic: VideoNuLA and 6845 questions
Replies: 15
Views: 726

Re: VideoNuLA and 6845 questions

@tricky thankyou that is valuable feedback. I've found a really good post by @kieranhj. It's going to be difficult to achieve cycle accurate emulation of the original hardware but that's one of my aims. And the demos/games you mention will go a long way to proving whether I've managed it. Cycle acc...
by scarybeasts
Tue Mar 17, 2020 8:46 pm
Forum: wanted
Topic: Wanted: Tynesoft disc titles
Replies: 11
Views: 469

Re: Wanted: Tynesoft disc titles

The black disk with printed label was a "squeaker" when I attempted to load it, however i managed to catalogue it and it contained !BOOT & Welly and reported 0 tracks. Ok, so it's not possible to tell if a Tynesoft disc is a protected or unprotected version based on its appearance. My black Indoor ...
by scarybeasts
Mon Mar 16, 2020 9:15 pm
Forum: wanted
Topic: Wanted: Tynesoft disc titles
Replies: 11
Views: 469

Re: Wanted: Tynesoft disc titles

Ian Botham's Test Match was supplied on a 40track disc with no protection I'm curious whether protected vs. unprotected Tynesoft discs can be distinguished by appearance alone. I have an unprotected Indoor Sports. From the FSD, it looks like your Indoor Sports is protected. What does your Indoor Sp...
by scarybeasts
Mon Mar 16, 2020 9:40 am
Forum: wanted
Topic: Wanted: Tynesoft disc titles
Replies: 11
Views: 469

Wanted: Tynesoft disc titles

Hi, Continuing on my research into BBC disc protections (with an eye on converting @billcarr's FSDs into HFEs as accurately as possible), I'm after Tynesoft disc titles. Which ones? Not all Tynesoft titles have the protection that is particularly of interest. But I believe these do: - Boulderdash (i...
by scarybeasts
Fri Mar 06, 2020 9:32 pm
Forum: 8-bit acorn software: classic games
Topic: Using tape relay as sound channel
Replies: 12
Views: 1296

Re: Using tape relay as sound channel

I thought I had seen and heard it all but yesterday I accidentally played Aabatron on the Electron. Not a very remarkable game but the title screen music used the tape relay click as a sort of drum/rhythm sound channel. Any other games or demos that have done that? Also, I'm wondering if this is ba...

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