Search found 393 matches

by scarybeasts
Sat Aug 01, 2020 9:50 am
Forum: 8-bit acorn software: classic adventure games
Topic: Cholo challenges
Replies: 17
Views: 562

Re: Cholo challenges

Thanks for your file! I unzipped it to my GoTek drive as Drive 0, Given that you have a Gotek as drive 0, you can try original disc images to see if that helps. I've attached an HFE recently captured from an original Cholo disc using discbeast. (Unzip it before sticking it on the Gotek.) You mentio...
by scarybeasts
Thu Jul 30, 2020 9:24 pm
Forum: 8-bit acorn software: classic games
Topic: Repton 3: Emulator/RNG issue
Replies: 81
Views: 4147

Re: Repton 3: Emulator/RNG issue

Variant 1 and 3 are very similar -- only differences on a couple of tracks. Variant 2 has many differences (some are clearly visible changes in the BASIC loader files; changes to the binary files would need deeper analysis). Great work, everyone. I'm guessing these aren't in any particular order (s...
by scarybeasts
Thu Jul 30, 2020 9:10 pm
Forum: 8-bit acorn software: classic games
Topic: Repton 3: Emulator/RNG issue
Replies: 81
Views: 4147

Re: Repton 3: Emulator/RNG issue

Can I interest people with original Repton 3 discs to try the DCRC command of discbeast to fingerprint them, to demonstrate how we can use tooling to quickly get the community to check their discs for variants? Thanks to SarahWalker and sbadger for lots of discbeast testing and imaging (and further...
by scarybeasts
Tue Jul 28, 2020 7:58 pm
Forum: 8-bit acorn software: classic adventure games
Topic: Cholo challenges
Replies: 17
Views: 562

Re: Cholo challenges

Thanks for your file! I unzipped it to my GoTek drive as Drive 0, Given that you have a Gotek as drive 0, you can try original disc images to see if that helps. I've attached an HFE recently captured from an original Cholo disc using discbeast. (Unzip it before sticking it on the Gotek.) You mentio...
by scarybeasts
Sat Jul 25, 2020 1:29 pm
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

- Is there a CRC error reported? If yes, 40 track disc. And assuming there isn't a deliberate CRC error due to copy protection. That's a fair point. The good news here is that discbeast is only looking for CRC errors on sector headers (not sector data). Surprisingly, we're not aware of any beeb cop...
by scarybeasts
Sat Jul 25, 2020 1:26 pm
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

Just tried to image AMX XAM with 0.3.1. [...] The resulting images are posted here . Looks like an 80 track surface to me, which is dual 40/80 compatible. Am I right in assuming DiscBeast does not allow you to write back the image to a disc? That's right. To an extent, this is a fundamental propert...
by scarybeasts
Sat Jul 25, 2020 12:48 pm
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

I'm still wondering here: are the two 80 tracks best viewed as two halves of a 40 track, or as one that's centered on a 40 track and the other that's in between tracks? I think we know that track 0 is always in the same place, so it feels to me like we should think of the odd 80 tracks as interleav...
by scarybeasts
Sat Jul 25, 2020 2:22 am
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

hmm I have a disc that's a copy of an original 40 track disc but because v0.3.1 sees data on the other tracks it thinks its a 80 track disk and goes and reads it as such and not as a 40 trk one, how can i wipe the data/sector id's on the odd tracks. if i use a old version where i can set dstp1 I ge...
by scarybeasts
Thu Jul 23, 2020 11:38 pm
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

1) Work out if a disc is a 40T or 80T surface. ... Of the above steps, 1) is a bit annoying. I don't know how reliable it would be if I tried to automate it. Actually, looks like it is possible to automate 40 track vs. 80 track disc detection reliably. The discbeast download earlier in the thread h...
by scarybeasts
Thu Jul 23, 2020 11:28 pm
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

Early "40/80 track dual format" discs were laid out with tracks 1-19 unused, and two copies of the actual data on tracks 20-39: one at 48TPI spacing and one at 96TPI spacing, on the portion of the disc which is physically within what a 40-track drive sees as the "unused" area. That's very interesti...
by scarybeasts
Wed Jul 22, 2020 5:19 am
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

Right did a 40 track dump of Doctor Who CRC D309CAA6 Thanks. Some good news here: it's easy to calculate the 40 track CRC32 from an 80 track dump, so I have added this. e.g. on your TRKS files it now says: HFE Grab version: 0 Tracks: 81 Single sided Captured with: 1770 Drive speed: 3133 Disc CRC32:...
by scarybeasts
Wed Jul 22, 2020 3:19 am
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

But the table describes the -E as an 80 drive so are you using that with software double stepping? I don't have that drive. I was trying to cite it as an example of a 40T drive with an 80T head, but that is obviously wrong! I just remembered that the other way round exists though. The C64 drive is ...
by scarybeasts
Wed Jul 22, 2020 1:08 am
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

Did later 40 track discs have the same head as the 80 track ones and a different stepper motor? I had always assumed that the transition from 40 to 80 tracks was due to being able to make the heads smaller and that the situation with 40 and 80 tracks discs was similar to mono and stereo cassette ta...
by scarybeasts
Tue Jul 21, 2020 8:39 am
Forum: new projects in development: games
Topic: Moon Patrol for the beeb (New port, just starting)
Replies: 69
Views: 5870

Re: Moon Patrol for the beeb (New port, just starting)

tricky wrote:
Tue Jul 21, 2020 8:10 am
Streaming would be tricky as there are only 3 bytes unused and about 8 for the stack (OS, BASIC, DFS, workspaces Pah!) ;)
If you've smashed OS and DFS beyond recognition, there's always quicdisc :-)


Cheers
Chris
by scarybeasts
Tue Jul 21, 2020 5:31 am
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

it's a 40/80 track disk so copied it as 80 track as you can see by the discbeast photo I had also sent Yeah, yours is definitely an 80 track surface. Mine is definitely a 40 track surface. I have found most dual 40/80 discs appear to be recorded 40 track, with the "in-between" tracks reading as noi...
by scarybeasts
Tue Jul 21, 2020 3:56 am
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

Mine is also the BBC version that requires the ROM to work, attached is the dsd of the track dump. Great! Looks like a clean capture, works in beebjit, and is a new variant :) My disc is 40/80 compatible but its definitely recorded 40 track. My disc looks like this: drwho.JPG Your disc is an 80 tra...
by scarybeasts
Tue Jul 21, 2020 3:37 am
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

Am curious what all the different colors and symbols mean with discbeast ? Yes, these should be documented, so I added some text to the README (appended below for reference). My various discs cover all of the colors :) e.g. Sherston Software weak bits are red; sector overread based protections are ...
by scarybeasts
Mon Jul 20, 2020 11:32 pm
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

So what does Discbeast say in response to an unrecognised command? I just changed it so it says UNKNOWN COMMAND. I also added a warning if it looks like a 40 track capture was done on an 80 track drive without double stepping. I'll post the new SSD now, by updating the SSD earlier in the thread (do...
by scarybeasts
Mon Jul 20, 2020 8:50 am
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

installed my 1770 DFS and copied the few disc's I have :- Doctor Who 40/80 CRC 515BA8F4 I have this disc too (BBC B version, comes with a ROM as well as the disc). Is yours the BBC B version or the Master version? I get a different full disc CRC32: 8A299B60 Any chance you have a SSD with the TRKS f...
by scarybeasts
Sun Jul 19, 2020 11:18 pm
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

vanekp wrote:
Sun Jul 19, 2020 11:02 pm
the ssd is the raw track files created by discbeast.
Sorry for missing that!

The logical track IDs in the capture are 0 -> empty -> 1 -> empty -> 2 -> ...
It looks like a 40 track disc was captured on an 80 track drive, without double stepping enabled (DSTP 1)?


Cheers
Chris
by scarybeasts
Sun Jul 19, 2020 10:16 pm
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

I will attach the faulty ssd disc dump you can have a look yourself to see why it did that. I would have though it would only have a fault on the part of the disc it had a problem reading, but its messed all the tracks and sectors up after the faulty file.. Yes, each track should be completely inde...
by scarybeasts
Sun Jul 19, 2020 1:01 pm
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

I've attached discbeast-0.2. Older versions should no be used for any HFE captures. Key changes: - Weak bits support. HFE Grab can now capture Sherston Software titles with weak bits protection and create a working HFE file with the appropriate random opcode. - Better sector framing. Firetrack captu...
by scarybeasts
Sun Jul 19, 2020 12:49 pm
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

installed my 1770 DFS and copied the few disc's I have :- Doctor Who 40/80 CRC 515BA8F4 Repton ATW 80trk CRC 85923C1D Repton ATW 40trk CRC 64866B40 Disc Executor 40trk CRC 3CD824DA Bone Cruncher 40trk CRC 7028F0E3 Bone Cruncher 80trk CRC 637E74E9 Repton3 40 trk CRC 433657E5 Repton3 80 trk CRC F0DC7...
by scarybeasts
Sun Jul 19, 2020 12:35 pm
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

Is there a way of erasing a disc with discbeast ? Depends what you mean by "erase". I believe you're running with a 1770 so one thing you can do is write a track with no sector markers, i.e. BFIL &FF WTRK This uses the 1770 write track facility. The resulting track will give you Disc error 18 (no s...
by scarybeasts
Fri Jul 17, 2020 9:42 pm
Forum: 8-bit acorn emulators
Topic: New beebjit release: v0.9.2
Replies: 13
Views: 963

Re: New beebjit release: v0.9.2

vanekp wrote:
Fri Jul 17, 2020 9:33 pm
will beebjit work with a 1770 DFS ?
Yes, as of latest master. I've added what I believe to be a pretty accurate 1770 emulation. I use it to run discbeast under emulation. I'm thinking of a v0.9.3 release some time.

Need it for anything interesting? :)


Cheers
Chris
by scarybeasts
Thu Jul 16, 2020 9:21 pm
Forum: archive submissions
Topic: Superior Software Elite HFEs from discbeast 1770
Replies: 3
Views: 207

Re: Superior Software Elite HFEs from discbeast 1770

What makes the copy protection on Elite so special ? Superior software...surely you mean Acornsoft ? It's the Superior Software / Acornsoft re-release with the BBC, 6502 and Master versions all on one disk. Came in a VHS style case. The protection on Elite (Acornsoft disk version) wasn't so differe...
by scarybeasts
Thu Jul 16, 2020 2:23 am
Forum: archive submissions
Topic: Superior Software Elite HFEs from discbeast 1770
Replies: 3
Views: 207

Superior Software Elite HFEs from discbeast 1770

Hi,

In the folder: https://drive.google.com/drive/folders/ ... 2_0Oauaxdb

Elite_Superior_Side_1_40T_HG2_26C1C2A5_1.hfe
Elite_Superior_Side_2_80T_HG2_7E7A06A8_1.hfe

(This disc was not previously archived at all.)


Cheers
Chris
by scarybeasts
Wed Jul 15, 2020 9:48 am
Forum: 8-bit acorn software: classic games
Topic: Repton 3: Emulator/RNG issue
Replies: 81
Views: 4147

Re: Repton 3: Emulator/RNG issue

So, it seems there has been some confusion, most of which is probably my fault. The only version that we have found so far with the bug is the very first Repton 3 stand-alone full-price disc release (which we've been calling "v1"). This seems to be the version that's on Stairway to Hell (or at leas...
by scarybeasts
Wed Jul 15, 2020 8:51 am
Forum: 8-bit acorn software: other
Topic: Discbeast, new disc and archival utility -- NEED VOLUNTEERS
Replies: 61
Views: 1983

Re: Discbeast, new disc and archival utility -- NEED VOLUNTEERS

so reading the readme I take it you need to extract the files off the image into a folder on your linux/windows system to the build the .hfe file ? running a c file on linux is easy but another story in windows is there a windows executable available somewhere? Do you have many original discs? [upd...
by scarybeasts
Wed Jul 15, 2020 8:35 am
Forum: for sale / freebies
Topic: For sale: Master and lots of other bits
Replies: 17
Views: 997

Re: For sale: Master and lots of other bits

I'm potentially interested in any discs -- is that a Planetoid disc I see.

PM sent!


Cheers
Chris

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