Search found 731 matches

by SteveF
Tue Oct 27, 2020 10:25 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Thanks guys, it's great to have this working properly!
by SteveF
Mon Oct 26, 2020 12:12 am
Forum: 8-bit acorn software: other
Topic: Why was BBC BASIC so fast?
Replies: 106
Views: 3854

Re: Why was BBC BASIC so fast?

The idea of a Microsoft BASIC port is absolutely intriguing, even the existence of this quick and dirty port is very cool - thanks for doing it! I don't know why, but it is... The idea you could have a model B booting to a variant of the classic "BBC Computer 32K/Acorn DFS/BASIC" screen declaring *M...
by SteveF
Fri Oct 23, 2020 11:37 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

For what it's worth I've raised an issue on the BeebEm github repo asking if this could be supported: https://github.com/stardot/beebem-windows/issues/66 I wouldn't blame the devs for saying no, but it doesn't hurt to ask. Chris (BeebEm maintainer) is taking a look at this (thanks Chris!), he has p...
by SteveF
Fri Oct 23, 2020 8:20 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

And on real hardware, it looks like this: Brilliant, thanks Ken! Ok... If its just the emulator then I'm fine running it in another permutation. I ran the Mode 7 program and got this Thanks Marcus! I do appreciate the bug report though, there are so many possible games and hardware permutations tha...
by SteveF
Fri Oct 23, 2020 8:03 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

This is really weird. Here's what that program should look like on a model B: Screenshot at 2020-10-23 19-59-19.png But if it doesn't work on Ken's machine, how does Ozmoo (which uses the same trick) work on his machine with no shadow RAM?! I am not certain anyone's every run that test program on re...
by SteveF
Fri Oct 23, 2020 7:46 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Confirming that this works for me on real hardware - a plain beeb with SWRAM at banks 4, 5, 6 & 7 Thanks for trying that Ken, much appreciated! Marcus - if you're feeling keen, could you please try the zipped SSD in the first post of this thread and post a screenshot of the result? If that says "He...
by SteveF
Fri Oct 23, 2020 7:26 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Nerd-out technical details Fascinating, and much appreciated - thanks for writing it up. Thank you for reading! These technical posts feel a bit self-indulgent sometimes so it's nice to know they're being read after all. I'm never sure if I've got the level of detail right, given even technically i...
by SteveF
Fri Oct 23, 2020 7:24 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

fixes your problem Marcus! Yep copro in Beebem now working... Thanks, that's a relief! But... I've discovered another one #-o Beebem again... I've no hardware access at the minute... Standard BBC B mode with 64k Sideways RAM (slots 4567) mode 7 is the only option. Fills the screen with garbage alth...
by SteveF
Thu Oct 22, 2020 6:40 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Right, here's alpha 3.3: https://github.com/ZornsLemma/ozmoo/releases/tag/stardot-ozmoo-preview-2020-10-22-alpha-3.3 I hope this fixes your problem Marcus! There was a glitch in the initialisation of the tube host cache. I think it's correct now, but I've thought that before. Slightly worryingly I a...
by SteveF
Thu Oct 22, 2020 4:33 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

I think I've found a bug thats crept in between v3.1 and v3.2 In Beebem if i choose Master and 65c02 copro. Then boot the attached Alice disk select mode (0). With v3.1 it runs fine... with v3.2 it prints some location text and then a " Fatal error :8 " Thanks Marcus, I can reproduce this - let me ...
by SteveF
Thu Oct 22, 2020 3:28 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Here's alpha 3.2: https://github.com/ZornsLemma/ozmoo/releases/tag/stardot-ozmoo-preview-2020-10-22-alpha-3.2 User-visible changes The main new feature is support for the "turbo" 256K second processor. (I'm going to call it a copro from here on to reduce verbosity. :-) ) The loader will show "Second...
by SteveF
Sat Oct 17, 2020 7:27 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Your solution sounds good, but would an easier hack be to generate a text file with all the commands and just *EXEC it?
by SteveF
Thu Oct 15, 2020 11:02 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

I hope this will be fixed in alpha 3.11: https://github.com/ZornsLemma/ozmoo/releases/tag/stardot-ozmoo-preview-2020-10-15-alpha-3.11 Apart from some work on the already-posted virtual memory diagram I don't think there's anything else new in here. I think the code changes I've made are genuine bug ...
by SteveF
Thu Oct 15, 2020 7:32 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Thanks for reporting that Ken, I don't know what the problem is yet but I have been able to reproduce it, so I'll report back later with a fix (hopefully!). FWIW I am using b-em to emulate a model B with 144K sideways RAM, *no* shadow RAM and both DFS and ADFS fitted (so host PAGE is &1F00) and a 65...
by SteveF
Mon Oct 12, 2020 8:10 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

This is probably a good point to ask: what's the purpose of vmap_clock_index? I have a vague impression it's there to help be "fairer" about deciding which block to evict when there's more than one with the joint-oldest timestamp, but I'm not really very clear about exactly how this would work even...
by SteveF
Mon Oct 12, 2020 4:11 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

(Nice! Reposted over on 6502.org) Thanks! I think that's a great explanation of the vmem subsystem, and one that we'd like to include in the Ozmoo project. Thanks, that would be cool! Perhaps you'd be better off writing the VM cache index entries in an ascending order, and with space between them, ...
by SteveF
Sun Oct 11, 2020 9:10 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

This post is just some technical wafflings about Ozmoo, for anyone interested in that sort of thing - there's nothing new here and you don't need to care about any of this to use it to build game discs or play them. I found myself forgetting exactly how the virtual memory code works, so I thought I'...
by SteveF
Sat Oct 10, 2020 2:37 pm
Forum: 8-bit acorn software: other
Topic: Simple demo for SHADOW screen modes?
Replies: 21
Views: 616

Re: Simple demo for SHADOW screen modes?

One thing, looking at the Ozmoo thread, not only do we need our SWRAM and SHADOW to work correctly but we might need it to be detected correctly by software, and controlled correctly. So there might be some compatibility considerations. For shadow RAM Ozmoo just expects the OS (or third-party code ...
by SteveF
Fri Oct 09, 2020 7:23 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

=D> =D> Wow this has progressed into a very polished application :D Thanks Marcus! and in 40x32 (Mode 4) character resolution: Thanks Ken, it's interesting to see this screenshot shows off the "[Cursor DOWN]" text patched into the game to make it work better in 40 column mode. Maybe I was just lazy...
by SteveF
Thu Oct 08, 2020 9:07 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Thanks Ken!

I knew there'd be something I'd missed... I mean, I left that in just to test you, good work finding it so quickly. :-)

Alpha 3.1 should fix this: https://github.com/ZornsLemma/ozmoo/rel ... -alpha-3.1
by SteveF
Thu Oct 08, 2020 8:26 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

This looks absolutely tremendous, and thank you so much for continuing to develop and perfect Acorn Ozmoo! Thanks! It's mostly a pleasure, although I did groan a bit when I thought I'd fixed the restore bug and it turned out I a few days later I'd only fixed it for Z3. :-) It's difficult to keep up...
by SteveF
Thu Oct 08, 2020 7:51 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

So here's alpha 3.0: https://github.com/ZornsLemma/ozmoo/releases/tag/stardot-ozmoo-preview-2020-10-08-alpha-3.0 What's new? Smaller games will now run on a BBC without sideways RAM. "Hollywood Hijinx" and "Calypso" are just about playable on a BBC B with DFS and no other expansions, for example. Th...
by SteveF
Sun Sep 27, 2020 12:31 am
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Looks good Fredrik, nice work! I'll have a look at merging all the latest changes over once I finish playing with the Acorn build system.
by SteveF
Wed Sep 23, 2020 3:41 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Bug in Ozmoo which made Beyond Zork not recognize any commands: Fixed in Ozmoo 4.1. Thanks for finding it! Thanks Fredrik, once I finish my build system tweaks (which should allow easily building a tube-only disc image for a big game like this) I'll port the fix over and with any luck we'll have BZ...
by SteveF
Tue Sep 22, 2020 12:40 am
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Thanks Fredrik, on trying again I was able to build this myself to run under VICE. It's good to know the "[What?]" isn't something I've introduced!
by SteveF
Sun Sep 20, 2020 11:07 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Confirming that these tests were all with mode 0 and shadow ram disabled. TBH, the disk access between DFS & ADFS may be much the same. It may just be slower ADFS disk access, relative to DFS, that makes it feel like there's more disk access. If I enable Shadow RAM, and with the Co-Pro active, and ...
by SteveF
Sun Sep 20, 2020 4:08 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Beeb 2 - 1770 controller, 3 x 16K SWRAM, PITubeDirect DFS (DFS2.26): Takes a bit of time to load. Once loaded, still needs occasional disk access. Floppy ADFS (ADFS1.30): Takes a long time to load. Once loaded, still needs fairly frequent disk access. HDD ADFS (ADFS1.30): Loads quickly. Once loaded...
by SteveF
Sun Sep 20, 2020 2:15 am
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

So here's alpha 2.8: https://github.com/ZornsLemma/ozmoo/releases/tag/stardot-ozmoo-preview-2020-09-12-alpha-2.8 What's new? The main change is that when using a second processor, spare RAM in the host is now used as a second level of cache to store game data. Main RAM (between host OSHWM/"PAGE" and...
by SteveF
Wed Sep 16, 2020 8:34 pm
Forum: 8-bit acorn software: other
Topic: PunyInform and Ozmoo
Replies: 331
Views: 13258

Re: PunyInform and Ozmoo

Finally got a chance to test alpha2.7. It worked fine, but I only did a basic test, without the preopt. I just packaged up HHGG and Calypso and had did a quick playtest of both of them in BeebEm. Thanks lurkio, good to know it's still working! Are there any particular tests I should run that would ...
by SteveF
Sat Sep 12, 2020 10:31 pm
Forum: development tools
Topic: BeebAsm
Replies: 122
Views: 15079

Re: BeebAsm

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