Search found 3418 matches

by tricky
Sat May 25, 2019 3:19 pm
Forum: general
Topic: Nice article about games for the bbc micro
Replies: 1
Views: 68

Nice article about games for the bbc micro

From a comment on one of my videos. "... I wrote article about BBC Micro Games on our site www.retronagazie.eu, and there are many minireviews of your games. http://www.retronagazie.eu/nora-przeglad-gier-na-bbc-micro-czesc-i/ ..." It is in Polish, but Google translate does a good enough job, if a li...
by tricky
Sat May 25, 2019 10:31 am
Forum: software: new games
Topic: Moon Patrol for the beeb (New port, just starting)
Replies: 21
Views: 1617

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

Minor progress update:

URL:https://youtu.be/nZaieTuQ4bg View at 720p+ for 50hz.
by tricky
Fri May 24, 2019 6:48 am
Forum: hardware
Topic: Beeb ( non centreing ) joysticks
Replies: 2
Views: 194

Re: Beeb ( non centreing ) joysticks

Its a different analogue setup.
Depending on how they are wired, you might be able to make a cable, but otherwise they would need rewiring internally.
You might do better with one of the USB adapters for arcade controls, look for zero latency to find them.
Unless anyone else has any better ideas!
by tricky
Mon May 20, 2019 11:35 am
Forum: software: new games
Topic: Doom?
Replies: 122
Views: 5275

Re: Doom?

Is there a technical reason that it can't be 40 floppy images and a loop with *din in it?
I assume that the copro is using the fs and that there is no opportunity to swap discs to continue.
by tricky
Sun May 19, 2019 5:34 pm
Forum: hardware
Topic: Faulty Issue 7 continuous beep [11]
Replies: 7
Views: 183

Re: Faulty Issue 7 continuous beep [11]

Thanks, it is socketed and I did swap it for the only spare I had (from an unknown source). I have a cheap ic identifier that is supposed to detect it, but it doesn't recognise either - hence the request for a list of spares while I'm ordering more.
by tricky
Sun May 19, 2019 3:06 pm
Forum: hardware
Topic: Faulty Issue 7 continuous beep [11]
Replies: 7
Views: 183

Re: Faulty Issue 7 continuous beep [11]

I tried that too, I don't think this is just a RAM problem. The mode 0 part shows that both sets of RAMs are returning something similar - the white sections contain black dots that are hard too see on the photo. I don't know if the data isn't being written or is being read incorrectly, but I think ...
by tricky
Sun May 19, 2019 2:03 pm
Forum: hardware
Topic: Faulty Issue 7 continuous beep [11]
Replies: 7
Views: 183

Re: Faulty Issue 7 continuous beep [11]

S25 south, no difference, even the snow looks similar!
I can't say where the misses might see - only a few :^o
Just noticed on the inside of the lid "BRANKSOME COMP. BIOLOGY DEPT."
by tricky
Sun May 19, 2019 12:01 pm
Forum: hardware
Topic: Faulty Issue 7 continuous beep [11]
Replies: 7
Views: 183

Faulty Issue 7 continuous beep [11]

This one looks more promising, with the OS swapped for my OS replacement test ROM, the CPU runs but the displayed image is quite wrong! The first screen displayed should be my Frogger splash screen: frogger.jpg but it isn't not_frogger.jpg , then there should be a MODE 0 test pattern: mode0.png but ...
by tricky
Sun May 19, 2019 10:58 am
Forum: hardware
Topic: Faulty Issue 7 upgraded model A beep black screen no cursor [10]
Replies: 18
Views: 320

Re: Faulty Issue 7 upgraded model A beep black screen no cursor [10]

I'm going to pause this one for now and look for one that I can hopefully identify the cause a little easier as I really want a couple of backups for June.
by tricky
Sun May 19, 2019 10:41 am
Forum: hardware
Topic: Faulty Issue 7 upgraded model A beep black screen no cursor [10]
Replies: 18
Views: 320

Re: Faulty Issue 7 upgraded model A beep black screen no cursor

I've been "experimenting" with triggers and it looks like there is possibly a delay between the 6502 RST changing and the first address as changing to trigger off the address line does get signals that make sense. About 1 in 4 resets (but in batches of good/bad) I get what looks like sensible signal...
by tricky
Sun May 19, 2019 8:33 am
Forum: hardware
Topic: Faulty Issue 7 upgraded model A beep black screen no cursor [10]
Replies: 18
Views: 320

Re: Faulty Issue 7 upgraded model A beep black screen no cursor

Thanks guys, Elminster, Sorry, the scope is a cheap USB one from a few years ago "OWON" and the trigger modes are AUTO, SINGLE and NORMAL and there is a FORCE "button". I'm going to have to play around a bit, but it does have setting for triggering on various video signal (inc PAL) events which migh...
by tricky
Sun May 19, 2019 8:08 am
Forum: hardware
Topic: Hoglet's Past Projects #1 - the Modem
Replies: 11
Views: 1272

Re: Hoglet's Past Projects #1 - the Modem

Nice one Hoglet, looks like it could have come from WE (meant as a compliment - just in case).
by tricky
Sat May 18, 2019 11:02 pm
Forum: hardware
Topic: Faulty Issue 7 upgraded model A beep black screen no cursor [10]
Replies: 18
Views: 320

Re: Faulty Issue 7 upgraded model A beep black screen no cursor

It has auto, single and force, but they all pause for about a quarter of a second before continuing - I'll rtm :O
by tricky
Sat May 18, 2019 9:53 pm
Forum: hardware
Topic: Faulty Issue 7 upgraded model A beep black screen no cursor [10]
Replies: 18
Views: 320

Re: Faulty Issue 7 upgraded model A beep black screen no cursor

Vanekp, I'll check tomorrow.
Kazzie, I didn't see any, but I haven't worked out how to get a trace to freeze after a trigger.
by tricky
Sat May 18, 2019 4:05 pm
Forum: hardware
Topic: Faulty Issue 7 upgraded model A beep black screen no cursor [10]
Replies: 18
Views: 320

Faulty Issue 7 upgraded model A beep black screen no cursor [10]

I got one of my "untested" ebay beebs out to try it (for the 1st time) and surprise surprise, its doesn't work. It has a blank screen, no cursor, continuous beep and no LEDs lit. 5V on CPU is 4.95v and 5.00, 4.99 and 4.96 on the power connectors. I've re-seated everything socketed, swapped 6522s and...
by tricky
Thu May 16, 2019 12:55 pm
Forum: introduce yourself
Topic: New user from York, England
Replies: 11
Views: 429

Re: New user from York, England

Welcome, you might also like the "Floppy Days" podcast, they aim to cover all old micros and are nearly up to the beeb.
by tricky
Thu May 16, 2019 12:47 pm
Forum: programming
Topic: How to force a hard reset (CTRL+BREAK)?
Replies: 18
Views: 424

Re: How to force a hard reset (CTRL+BREAK)?

... Except for some critical memory locations: &FC, &180-&200, &258, &287 and &D00. ... I'm not that generous, I use ESCAPE to quite as above and grab NMI before I start (may not be necessary as I'm not sure it guarantees stopping NMIs) and then use everything except &FC, &204/5 and a few bytes of ...
by tricky
Tue May 14, 2019 8:38 pm
Forum: programming
Topic: On the subject of horizontal software scrolling games
Replies: 36
Views: 4597

Re: On the subject of horizontal software scrolling games

I guessed that I must have missed those two bits when you posted. Oh well, not magic, but still a good bases for a horizontal scroller. There was this tiny hint, there was more but I cut out half of the ramble from the earlier posts before posting: PS this won't work correctly in most beebem version...
by tricky
Tue May 14, 2019 6:23 pm
Forum: emulators
Topic: 50 fps on b-em?
Replies: 18
Views: 470

Re: 50 fps on b-em?

Actually, I just checked and my version that slowed down is due to the extra UI I added and updated every clock cycle!
by tricky
Tue May 14, 2019 6:17 pm
Forum: programming
Topic: On the subject of horizontal software scrolling games
Replies: 36
Views: 4597

Re: On the subject of horizontal software scrolling games

Thanks Rich for taking an interest. Basically it is double buffered for single pixel offsets and uses R3 for double pixel offsets, giving hardware pixel scrolling and simplifies draw timing as you are writing to the "offscreen" copy (you loose the drawing "offscreen" if you only scroll every other f...
by tricky
Tue May 14, 2019 10:13 am
Forum: emulators
Topic: 50 fps on b-em?
Replies: 18
Views: 470

Re: 50 fps on b-em?

I have an i5 laptop (W7) and a couple of extra features added to b-em and it can't manage full speed, although the stock allegro 4 is fine. Infact , my 14 year old atom netbook (XP) is also fine with the old b-em, so maybe it is a windows 10 thing? I've not found any cycle level sim where everything...
by tricky
Mon May 13, 2019 6:50 am
Forum: projects
Topic: BBC Micro and Acorn Electron demo effects
Replies: 58
Views: 1986

Re: BBC Micro and Acorn Electron demo effects

That looks great and I love that you are making demos "cross-platform".
by tricky
Sun May 12, 2019 6:51 pm
Forum: projects
Topic: BBC Micro and Acorn Electron demo effects
Replies: 58
Views: 1986

Re: BBC Micro and Acorn Electron demo effects

Its great, but 15 years in the games industry has trained my eye to spot these things - its a pain mostly now :lol:
by tricky
Sun May 12, 2019 4:45 pm
Forum: software: games - high scores
Topic: High Score Challenge S11 - R8 - Road Runner
Replies: 51
Views: 879

Re: High Score Challenge S11 - R8 - Road Runner

Driving is tricky, but not buggy! 52500
by tricky
Sun May 12, 2019 4:21 pm
Forum: software: new games
Topic: Stunt Car Racer for BBC Master
Replies: 60
Views: 2975

Re: Stunt Car Racer for BBC Master

I can't speak for Kieran, but R-Type is a little tricky. You can do single pixel scrolling with a double buffered screen to make your life easier on the beeb like this . To do R-Type properly, you need 1/2 pixel scrolling or one every two frames which means displaying the same frame twice in a row w...
by tricky
Sun May 12, 2019 3:52 pm
Forum: hardware
Topic: Burning Plastic Smell - Master power supply?
Replies: 7
Views: 190

Re: Burning Plastic Smell - Master power supply?

This is off topic really, but while you might be getting one of these, would that also be suitable to "jack up" the 5V from the beeb to 10V in an RGB to SCART cable for TVs that want a higher voltage to auto swap to RGB 4:3 instead of 16:9?
by tricky
Sun May 12, 2019 3:40 pm
Forum: projects
Topic: BBC Micro and Acorn Electron demo effects
Replies: 58
Views: 1986

Re: BBC Micro and Acorn Electron demo effects

I love the effect, but it looks like there is a pixel missing every 32 pixels, as if the pattern was 33 pixels wide but only showing 32 - no gap.
Watch the bits with red lines around them as it animates.
by tricky
Sun May 12, 2019 1:11 pm
Forum: hardware
Topic: Burning Plastic Smell - Master power supply?
Replies: 7
Views: 190

Re: Burning Plastic Smell - Master power supply?

I was wondering whether you could use a 5v supply and a "buck converter" to get the -5v.
Maybe they would be too "noisy".
PS You don't need the 12v for a gotek.
by tricky
Sat May 11, 2019 10:15 pm
Forum: projects
Topic: BBC Micro and Acorn Electron demo effects
Replies: 58
Views: 1986

Re: BBC Micro and Acorn Electron demo effects

On the beeb we can cheat when it comes to horizontal pixel scrolling a cut down mode 1 ;)