Search found 151 matches

by scarybeasts
Mon Oct 14, 2019 7:33 pm
Forum: software: other
Topic: Calculating digits of Pi in Basic
Replies: 33
Views: 503

Re: Calculating digits of Pi in Basic

Perhaps *SPOOL to the copy/paste buffer, or into a little text area from which one could copy and paste? If not *SPOOL, then capture the RS432 output... for which we need to know some *FX trickery. But wait: the OS supports a printer, and control-B enables it, so how about capturing that output int...
by scarybeasts
Mon Oct 14, 2019 4:23 am
Forum: software: other
Topic: Calculating digits of Pi in Basic
Replies: 33
Views: 503

Re: Calculating digits of Pi in Basic

BigEd wrote:
Sun Oct 13, 2019 10:48 am
I'd like to, but I'd need to type it in... that's a drawback of experimenting in JSBeeb.
What do you think jsbeeb could offer to make this sort of thing easier?


Cheers
Chris
by scarybeasts
Mon Oct 07, 2019 5:47 pm
Forum: emulators
Topic: Request for testers for quick but fascinating test case
Replies: 35
Views: 1207

Re: Request for testers for quick but fascinating test case

It boils down to whether the disc drive ribbon cable is plugged into the disc drive port at power-on or not: Plugged in: 2/1 Not plugged in: 1/1 Changing this (ie. plugging or unplugging the cable) whilst powered on makes no difference to the result, it is the same from power on until the next powe...
by scarybeasts
Sat Oct 05, 2019 5:33 am
Forum: emulators
Topic: Request for testers for quick but fascinating test case
Replies: 35
Views: 1207

Re: Request for testers for quick but fascinating test case

I'll try Station 129 (BBC Model B issue 2) over the weekend, it's currently having a rest whilst its space is being occupied by my 2 A4000s which are being saved for the nation after 9 years of battery leakage in storage. Issue 2!!! What a beauty. Not sure if this picture I found is it or not but i...
by scarybeasts
Fri Oct 04, 2019 3:24 pm
Forum: emulators
Topic: Request for testers for quick but fascinating test case
Replies: 35
Views: 1207

Re: Request for testers for quick but fascinating test case

FWIW on my Issue 4 Beeb, I also get 1/1 Thanks! If you happened to know what type of 6522 VIAs it has, that's also useful information! If anyone had any of these configurations, they'd be super useful to test: 1) More issue 3s, any type of 6522 VIA. 2) An issue 7, with non-Rockwell 6522 VIA (did an...
by scarybeasts
Thu Oct 03, 2019 6:50 pm
Forum: emulators
Topic: Request for testers for quick but fascinating test case
Replies: 35
Views: 1207

Re: Request for testers for quick but fascinating test case

Issue 7 model B 2 CYCLE STRETCH:1 3 CYCLE STRETCH: 1 Thanks Chris. That's definitely different to this issue 3, which is giving an answer of 2 / 1. I must admit, 1 / 1 was not expected, if anything I was expecting 2 / 2. I'll need to go away and think about this. More model B test results welcomed!...
by scarybeasts
Thu Oct 03, 2019 5:51 pm
Forum: emulators
Topic: Request for testers for quick but fascinating test case
Replies: 35
Views: 1207

Request for testers for quick but fascinating test case

Hi, We've uncovered a strange test result on an issue 3 model B that might represent a change in hardware cycle stretching behavior between earlier and later B's. But it's unclear. Anyone able to run a small test on any BBC (issue anything, B, Master, etc.) and share results would be really helping,...
by scarybeasts
Thu Sep 26, 2019 8:15 pm
Forum: wanted
Topic: Wanted: map and clues sheet for BBC Exile
Replies: 7
Views: 504

Re: Wanted: map and clues sheet for BBC Exile

Hi,

Just bumping this thread.

I now have a copy of the clue sheet thanks to a generous gift at ABUG.

So now I'm just looking for a copy of the map. Willing to buy, trade, negotiate emulator features (jsbeeb), donate to the Centre of Computing History, etc.


Cheers
Chris
by scarybeasts
Thu Sep 26, 2019 8:09 pm
Forum: upcoming and recent events & exhibitions
Topic: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.
Replies: 249
Views: 9486

Re: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.

Thanks all for the warm welcome and excellent organization / program -- I had a blast.

I left with a real beeb stuffed into my backpack -- interesting times at Heathrow security -- and I will redouble my efforts to better understand the machine for purposes of accurate emulation!


Cheers
Chris
by scarybeasts
Sat Sep 07, 2019 10:30 pm
Forum: software: classic games
Topic: Stryker's Run
Replies: 9
Views: 602

Re: Stryker's Run

Sorry if the original post wasn't clear. No, I already have my own copy of it. The tape is available to download from StH but the disc isn't. So I just wanted an upload of the disc which Bill Carr has provided. Cool. I'll add it to Everygamegoing so it's available for everyone too. The same STH dis...
by scarybeasts
Thu Sep 05, 2019 12:10 am
Forum: emulators
Topic: BBC B hardware mapping extent -- quick tests!
Replies: 15
Views: 458

Re: BBC B hardware mapping extent -- quick tests!

I'm pretty sure b2 gets the video ULA and CRTC wrong (which I must fix!), and I'll now have to check it's doing ROMSEL correctly too... --Tom b2 has ROMSEL correct. jsbeeb is different (and this incorrect), which is what got me asking about this area. Thanks again to everyone who is contributing re...
by scarybeasts
Wed Sep 04, 2019 9:15 pm
Forum: emulators
Topic: BBC B hardware mapping extent -- quick tests!
Replies: 15
Views: 458

Re: BBC B hardware mapping extent -- quick tests!

Rich Talbot-Watkins wrote:
Wed Sep 04, 2019 12:03 pm
scarybeasts wrote:
Wed Sep 04, 2019 9:40 am
?&FE2F=0
?&FE24=0
?&FE20=0
If you're aiming to hit the Video ULA control register and not the palette, that first one should be ?&FE2E=0.
Yes! ?&FE2E=0 is the correct first test #-o


Cheers
Chris
by scarybeasts
Wed Sep 04, 2019 9:40 am
Forum: emulators
Topic: BBC B hardware mapping extent -- quick tests!
Replies: 15
Views: 458

BBC B hardware mapping extent -- quick tests!

Hi, A quick and easy couple of tests to check out a discrepancy between the emulators. Best run on a relatively vanilla model B. 1) ROMSEL mapping On fresh boot, try these three lines and see on which one BASIC throws a fit: ?&FE3F=0 ?&FE34=0 ?&FE30=0 (This test essentially unmaps the BASIC ROM... w...
by scarybeasts
Wed Aug 28, 2019 8:19 am
Forum: emulators
Topic: Giant cursors vs. screen border -- quick test!
Replies: 2
Views: 194

Re: Giant cursors vs. screen border -- quick test!

Thanks! Giant cursors for everyone!
by scarybeasts
Wed Aug 28, 2019 5:38 am
Forum: emulators
Topic: Giant cursors vs. screen border -- quick test!
Replies: 2
Views: 194

Giant cursors vs. screen border -- quick test!

Hi, There's an interesting question of what happens when a cursor starts within the screen border but then keeps going! There's general emulator agreement that the cursor spews outside of the CRTC render area (perhaps because the ULA is mixing it in). But it'd be good to quickly check on a real beeb...
by scarybeasts
Fri Aug 23, 2019 7:28 am
Forum: for sale / freebies
Topic: Freebies for collection at ABUG Sep 2019
Replies: 10
Views: 544

Re: Freebies for collection at ABUG Sep 2019

I'd like to take the Repton Disks off you please if I may. Happy to donate to the Computer Museum or a Charity of your choice in exchange. Best wishes Andy Now both bagged and packed :) Do feel free to donate to the Computer Museum if you're inspired by what they do but there's no obligation attach...
by scarybeasts
Fri Aug 23, 2019 7:24 am
Forum: for sale / freebies
Topic: Freebies for collection at ABUG Sep 2019
Replies: 10
Views: 544

Re: Freebies for collection at ABUG Sep 2019

Dave Footitt wrote:
Wed Aug 21, 2019 7:36 am
Are you sure you don't want to sell any of these? I wouldn't mind Spy Vs Spy on BBC Disc :D
It's now packed with your name on it. It's yours for free. Feel free to buy me a pint if you are so inspired but there are no obligations attached.


Cheers
Chris
by scarybeasts
Fri Aug 23, 2019 2:42 am
Forum: for sale / freebies
Topic: Freebies for collection at ABUG Sep 2019
Replies: 10
Views: 544

Re: Freebies for collection at ABUG Sep 2019

sbadger wrote:
Wed Aug 21, 2019 10:20 am
Would love Palace of Magic please! :D
Now packed, with your name on it :-)


Cheers
Chris
by scarybeasts
Thu Aug 22, 2019 7:26 am
Forum: emulators
Topic: Emulation tests
Replies: 13
Views: 640

Re: Emulation tests

Yeah my main thing about OSWRCH is exactly which output is the machine-readable test info? But I guess in honesty we coudl check everything against a known-good. Or use the *SPOOL thing if that's easy to check for. Would a simple convention do it? e.g. THIS TEST TESTS WHATEVER TESTED ON TOM'S MASTE...
by scarybeasts
Wed Aug 21, 2019 6:24 am
Forum: upcoming and recent events & exhibitions
Topic: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.
Replies: 249
Views: 9486

Re: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019

I'll be bringing some surplus software to give away -- any ideas what thread I might use to see if anyone wants to bag specific items up front? Chris, start a new thread in the for sale / freebies section, then post a link to your new thread in a post here :wink: Mark Thanks! So here's the freebies...
by scarybeasts
Wed Aug 21, 2019 6:23 am
Forum: for sale / freebies
Topic: Freebies for collection at ABUG Sep 2019
Replies: 10
Views: 544

Freebies for collection at ABUG Sep 2019

Hi, Some freebies, with a catch: I'll be bringing them along with me to ABUG Sep 2019 in Cambridge, event details: https://stardot.org.uk/forums/viewtopic.php?f=25&t=17456 You'll need to collect them in person or have someone there collect them for you. Let me know if you want to grab dibs on any of...
by scarybeasts
Tue Aug 20, 2019 5:26 am
Forum: upcoming and recent events & exhibitions
Topic: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.
Replies: 249
Views: 9486

Re: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019

Moderators note: The archive request posts have been moved to a separate thread " Cambridge Sept 2019 archiving thread ". So can you please post anything related to archiving, scanning or similar in that thread rather than here, in this thread. Thanks Mark I'll be bringing some surplus software to ...
by scarybeasts
Sat Aug 17, 2019 12:34 am
Forum: emulators
Topic: Uridium and other games not working on JSBeeb
Replies: 30
Views: 769

Re: Uridium and other games not working on JSBeeb

Hi Chris, Great work so far =D> The issue that springs to my mind is the MODE 7 emulation. I don't think any emulator gets this exactly right. It could be fun to go on a spelunking mission to find teletext corner cases. But in the short term, I'd prefer to drive work off a list of known issues with...
by scarybeasts
Sat Aug 17, 2019 12:32 am
Forum: emulators
Topic: Uridium and other games not working on JSBeeb
Replies: 30
Views: 769

Re: Uridium and other games not working on JSBeeb

lurkio wrote:
Fri Aug 16, 2019 10:01 am
Hopefully the complete lack of sound in Safari on macOS can also be fixed. There seems to be a potential solution here:
:idea:
Ok, I'll sort this out.


Cheers
Chris
by scarybeasts
Fri Aug 16, 2019 8:10 am
Forum: emulators
Topic: Uridium and other games not working on JSBeeb
Replies: 30
Views: 769

Re: Uridium and other games not working on JSBeeb

Chris/scarybeasts has been busy fixing bugs in JSBeeb, and the new version of JSBeeb is now live at godbolt.org: https://bbc.godbolt.org I'd encourage everyone to test it with loads of different .SSD and .DSD disc-images to see how robust it is. Seems pretty good so far! Please do test! My main hop...
by scarybeasts
Sat Aug 10, 2019 9:31 pm
Forum: wanted
Topic: Wanted: map and clues sheet for BBC Exile
Replies: 7
Views: 504

Re: Wanted: map and clues sheet for BBC Exile

billcarr2005 wrote:
Sat Aug 10, 2019 2:20 pm
The pages have gone a lovely shade of off-white over the years...
That's the ones. Are these available for sale, trade (I have various Exile and other spare bits), jsbeeb patches / fixes, charitable donation? :)


Cheers
Chris
by scarybeasts
Sat Aug 10, 2019 9:55 am
Forum: upcoming and recent events & exhibitions
Topic: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.
Replies: 249
Views: 9486

Re: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019

jbnbeeb wrote:
Sat Aug 10, 2019 9:35 am
Can I assume you will be along for the entire weekend?
Yes! And oops, sorry for not adhering to the bolded instruction at the start of the thread :)


Cheers
Chris
by scarybeasts
Sat Aug 10, 2019 7:09 am
Forum: upcoming and recent events & exhibitions
Topic: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.
Replies: 249
Views: 9486

Re: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019

Hi,

Can you put me down as a no-kitter?
I live in the US these days but this is too good to miss :)


Cheers
Chris
by scarybeasts
Fri Aug 09, 2019 10:45 am
Forum: emulators
Topic: VIA port pin level behavior differences -- tests
Replies: 20
Views: 722

Re: VIA port pin level behavior differences -- tests

tom_seddon wrote:
Fri Aug 09, 2019 12:19 am
Looks like it can pull the pin low if the VIA is outputting 1, but it can't pull (push?) it high if the VIA is outputting 0.
Excellent, so the data sheet was telling the truth all along. Great to have it confirmed via a real test.


Cheers
Chris
by scarybeasts
Thu Aug 08, 2019 1:46 am
Forum: emulators
Topic: VIA port pin level behavior differences -- tests
Replies: 20
Views: 722

Re: VIA port pin level behavior differences -- tests

I've now got a test that reads the RTC registers and prints them on screen. If AS=1 the whole time, the value read is always FF, suggesting that the RTC is indeed not driving the bus. FF is what my Master gives when reading the slow databus with all devices disabled. (And this is also true when jus...