Uridium ssd file not found

[BigEd]

Uridium fails to load its disk:
http://bbcmicro.co.uk/game.php?id=557

Error: Unable to load http://bbcmicro.co.uk//gameimg/discs/Di ... diumCB.ssd, http code 404

[hoglet]

I think the URL should be:
http://bbcmicro.co.uk/gameimg/discs/557 ... diumCB.ssd

[pau1ie]

Thanks both. I fixed Uridium.

This is because when a game is edited it will move the files to a subdirectory. The normal play button is updated, but not if there is a custom URL (Generally to run the game on a master for the sideways RAM). This is the only game with the problem currently, but there are a few games which may get this problem in the future. I will pre-emptively sort them out.

[BigEd]

Thanks for a quick fix!

[pau1ie]

OK, I have moved all games with special URLs (Apart from ones that won't play so we have switched off) to their subdirectories and updated the URL to include the subdirectory. I think I have checked them and they work, but in case anyone else wants to double check that I haven't missed anything, the full list is pretty short and is:

• Uridium
• Exile
• Clogger
• Dunjunz
• Exiz
• Holed Out!!
• Zedon
• Holed Out!! (Extra Courses Vol.1)
• Holed Out!! (Extra Courses Vol.2)
• UIM (Ultra Intelligent Machine)
• Egghead In Space
• Astroblaster
• Quest For The Gobal
• Hobbit, The
• Lord Of The Rings: Game One, The

[BigEd]

This might be user error, but I fired up Uridium, selected keyboard and some custom keys, and when it eventually started it was just an endless cycle of demo plays. That is, I didn't find a way to start to play.

[bakoulis]

This might be user error, but I fired up Uridium, selected keyboard and some custom keys, and when it eventually started it was just an endless cycle of demo plays. That is, I didn't find a way to start to play.

Same here, even without redefine the keys. I can't start the game, plays only an endless demo mode.


EDIT:
I just downloaded the ssd image and tested with beebem and b-em and works as it should.
So the problem is definitely from Jsbeeb emulator.

[BigEd]

ah, good - well, kind of good - thanks - I've opened an issue
https://github.com/mattgodbolt/jsbeeb/issues/152

[pau1ie]

I've opened an issue

I thought I remembered encountering something like this before, and after searching, I think it may be related to previously discovered weirdness with uridium here. I am sure I got it to play before though I couldn't swear to it.

Actually there are bugs open in jsbeeb:
https://github.com/mattgodbolt/jsbeeb/issues/130
https://github.com/mattgodbolt/jsbeeb/issues/140

I suppose if you want to play uridium, it is b-em or the real hardware for now. Should we disable the play link until jsbeeb plays it reliably to stop confusion in the future?

[BigEd]

Is there a way to annotate the link rather than disable it? Could be useful for someone aiming to debug the problem.

[pau1ie]

Is there a way to annotate the link

Yes, we could put a note at the bottom of the game screen, though you wouldn't see it if you clicked play from the search page...

The version of jsbeeb on the website is quite old. I probably ought to update it at some point, but until I do it is probably not the best version to use for testing.

[BigEd]

Sounds good.

Fair point about the version - I just checked, and the official version of jsbeeb does the same thing, as does the latest source on the master branch.

[pau1ie]

I added a note on the uridium game page. Need to remember to remove it if/when jsbeeb is updated to fix the problem(s).

[BigEd]

Thanks!

[billcarr2005]

Are we sure it's the actual game / some emulation issue rather than the game code / transfer?
I could get this version, taken from the original disk working OK...
(I think the version from the STH archive worked fine too)

[bakoulis]

Are we sure it's the actual game / some emulation issue rather than the game code / transfer?
I could get this version, taken from the original disk working OK...
(I think the version from the STH archive worked fine too)

You have right, it works.
Your SSD and STH version works with jsbeeb as it should, but are 3 completely different versions.
Your version say "Press space to play" and it works
C.BBC.GA version starts with 2 text screens and it stucks
STH version haven't text screens and don't say "Press space to play" and it works
2 are working, this from the C.BBC.GA it stucks. Very strange.

[pau1ie]

I will leave this up to Lee. He tends to prefer MIck Brown's remastered versions (which this is) as they have the instructions from the inlay displayed before the game starts, but as you say, a version that works is probably better than one that doesn't.

[billcarr2005]

I've copied the working game files from the original disk with the !BOOT and Uridium (the instructions - seems unnecessarily obfuscated code?) from the remastered version and also made the disk image 40 track, to save 100KB of download each time!
Somebody else can tinker with it some more of it's not right!

EDIT: Had chance to try it in Master mode, and still seems to be stuck in demo mode, so no worse than before... will check the documentation and see if it was originally released as being fine on a BBC Master...

[lurkio]

I've copied the working game files from the original disk with the !BOOT and Uridium (the instructions - seems unnecessarily obfuscated code?) from the remastered version and also made the disk image 40 track, to save 100KB of download each time! Somebody else can tinker with it some more of it's not right! EDIT: Had chance to try it in Master mode, and still seems to be stuck in demo mode, so no worse than before... will check the documentation and see if it was originally released as being fine on a BBC Master...

Thanks, BillC. Your disc-image of Uridium (with instructions added) seems to work in JSBeeb in Model B mode:

• http://bbcmicro.co.uk//jsbeeb/play.php? ... llCarr.ssd

So, that's all well and good, but it doesn't explain why Mick's version failed in JSBeeb but worked in other emulators (and also worked on a real Beeb, presumably -- Lee will be able to confirm that)! So the bug report for JSBeeb is still valid, I think.

[billcarr2005]

So, that's all well and good, but it doesn't explain why Mick's version failed in JSBeeb but worked in other emulators (and also worked on a real Beeb, presumably -- Lee will be able to confirm that)! So the bug report for JSBeeb is still valid, I think.

It could be that JSBeeb is emulating everything correctly, whereas the other emulators aren't doing things right!
Master emulation is definitely bugged though, since the original disk works fine!

[lurkio]

So, that's all well and good, but it doesn't explain why Mick's version failed in JSBeeb but worked in other emulators (and also worked on a real Beeb, presumably -- Lee will be able to confirm that)! So the bug report for JSBeeb is still valid, I think.

It could be that JSBeeb is emulating everything correctly, whereas the other emulators aren't doing things right!

I suspect Lee will have tested Mick's version on a real Beeb because he's tested most of Mick's disc-images on a real Beeb (via DataCentre).

This is yet to be confirmed, but if Mick's version works on a real Beeb (ideally on a real floppy disc), then JSBeeb has a bug of some sort. Right?!

[leenew]

So, that's all well and good, but it doesn't explain why Mick's version failed in JSBeeb but worked in other emulators (and also worked on a real Beeb, presumably -- Lee will be able to confirm that)! So the bug report for JSBeeb is still valid, I think.

It could be that JSBeeb is emulating everything correctly, whereas the other emulators aren't doing things right!

I suspect Lee will have tested Mick's version on a real Beeb because he's tested most of Mick's disc-images on a real Beeb (via DataCentre).

This is yet to be confirmed, but if Mick's version works on a real Beeb (ideally on a real floppy disc), then JSBeeb has a bug of some sort. Right?!

You are incorrect Lurkio... I tested all the games on a real beeb with datacentre

Just checked Uridium via datacentre again and it loads and plays fine on my beeb.
I have also tried it on a real floppy and it also loads and plays fine

if it makes any difference, I selected KEYBOARD and did NOT redefine keys.

Lee.

[scarybeasts]

Here is what is going on with Uridium.

This applies to the STH version and the bbcmicro.co.uk version. The latter makes a better attempt to avoid the problem, but still does not avoid the problem.

The crux is that execution of the game loader arrives at &6F00, with IRQs enabled. It proceeds to set up and execute a copy from &1100 to &200. Furthermore, the ensuing write to IRQV points to &200.
There are various problems and race conditions here but the one most likely to trigger is where &0204 (IRQV) has been overwritten with &0200, but then an IRQ occurs shortly after, and before the full IRQ handler code at &0200 has been written.

[Removed attachment:
a version that behaves correctly is linked here:
viewtopic.php?f=51&t=13967&p=184720#p184671]
sha256sum 4e5f5aba3981978856ada91f1831ebb78faae0ea0a6bf59a7729de52e6c30adc
]

There remains a race &2532 where EVENTV is set with IRQs enabled which is a problem if a vsync triggers when one byte of EVENTV has been written but not the other. This is a very small race window though so is not addressed in the fixed version.

There's still a separate problem with the keyboard not working in Master mode in b-em / jsbeeb, but that's an emulator bug. For now, use normal BBC B mode.


Cheers
Chris

[scarybeasts]

Probably best to ignore the file in my last post, see the version here that works correctly:

viewtopic.php?f=51&t=13967&p=184720#p184671