Search found 2300 matches

by tricky
Mon Apr 23, 2018 12:11 pm
Forum: emulators
Topic: Video Timing
Replies: 15
Views: 349

Re: Video Timing

There are other differences to do with writing register values at certain times causing unexpected behaviour, but I can't remember the ones other than the corruption and extra displayed scanline on some master 6845s.
by tricky
Mon Apr 23, 2018 12:03 pm
Forum: emulators
Topic: Video Timing
Replies: 15
Views: 349

Re: Video Timing

I've had LCD displays fail to display not quite 50hz screens, that have been fine on CRTs and similar "pickiness" with h-sync width, which was more surprising as the LCDs seem to time of the edge of h-sync.
by tricky
Sun Apr 22, 2018 12:55 pm
Forum: emulators
Topic: Video Timing
Replies: 15
Views: 349

Re: Video Timing

What I have found with my games, RichTW, Hoglet, JBNBeeb and others is that there are different behaviours in different manufacturers 6845s that cause different behavior when setting different registers during display. Some of the data sheets hint at when things might differ. On frogger on some mast...
by tricky
Sun Apr 22, 2018 12:33 pm
Forum: introduce yourself
Topic: Decompiler Expert Just Joined
Replies: 11
Views: 246

Re: Decompiler Expert Just Joined

Welcome, sorry I missed you yesterday.
by tricky
Sun Apr 22, 2018 12:25 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 1 to 3 June 2018 (near Camberley)
Replies: 7
Views: 169

Re: ABUG SOUTH 1 to 3 June 2018 (near Camberley)

I confess, I made the magic smoke, well my beeb from BITD. The caps came from Mapling a couple of years ago and looked the business, but I guess they might have been really old stock, or maybe they were saving a bit of money and buying cheap knock-offs. This is the machine that I use for testing, so...
by tricky
Sat Apr 21, 2018 6:50 am
Forum: emulators
Topic: Video Timing
Replies: 15
Views: 349

Re: Video Timing

The nula is blanking a few extra pixels on the left side of the screen (probably one byte).
by tricky
Fri Apr 20, 2018 5:22 am
Forum: software: classic games
Topic: Green Beret
Replies: 7
Views: 359

Re: Green Beret

Yes,sorry, at least they made a beeb version.
Side scrollers and games with large sprites were thin on the ground.
by tricky
Thu Apr 19, 2018 7:12 pm
Forum: introduce yourself
Topic: New guy
Replies: 16
Views: 357

Re: New guy

One of my beebs was noisy, so I soldered a 10K ohm resistor across a jumper and connected it to the audio in on the 1MHz bus and the GND parallel. I don't know if this is the correct solution, but it worked for me. Now I have made up a D2A resistor ladder and connected it to the parallel printer por...
by tricky
Thu Apr 19, 2018 7:08 pm
Forum: software: classic games
Topic: Green Beret
Replies: 7
Views: 359

Re: Green Beret

Anything that distracts you from the gameplay isn't all bad!
by tricky
Thu Apr 19, 2018 5:32 am
Forum: software & utilities for the pc, mac or unix
Topic: New Disk Image Editor
Replies: 73
Views: 1953

Re: New Disk Image Editor

I'm regretting mentioning inf files. My original intention was only to note that they existed in the hope that you might be able to import them. Now though, there is a problem to be solved ;) How about having a line in the inf that is the beeb file name in hex, two "digits" per original by...
by tricky
Thu Apr 19, 2018 5:12 am
Forum: upcoming and recent events & exhibitions
Topic: Wakefield RISC OS show 21st April 2018
Replies: 49
Views: 1911

Re: Wakefield RISC OS show 21st April 2018

Looks like I will be able to make it, but m1 m6 means that I might not be very early.
Are there any 8bit tables?
Should I bring any kit?
I'm planning on going to Arcade club afterwards, does anyone else fancy going?
by tricky
Wed Apr 18, 2018 5:02 pm
Forum: emulators
Topic: MAME: Video handling
Replies: 38
Views: 1713

Re: MAME: Video handling

Pernod wrote:...I'll be moving back to BBC video next...

If you have to add any debugging code to get the 6845 etc implemented correctly, it would be great if you could leave it accessible.
I did have to write a mini sim to get some of my games working, but a debugger would be great.
by tricky
Wed Apr 18, 2018 4:58 pm
Forum: emulators
Topic: B-Em
Replies: 357
Views: 18388

Re: B-Em

That scrolling demo seems to be missing NuLA.

For joysticks, I did add support to beebem and b-em in my launcher app and the emulators that it runs.
by tricky
Wed Apr 18, 2018 5:52 am
Forum: emulators
Topic: b2 - new emulator
Replies: 68
Views: 5277

Re: b2 - new emulator

Thanks Tom, I'm happy to build from vs on windows, but from a trusted source (like you), assuming others can't inject their stuff, this produces a much lower barrier to entry without removing any options.
by tricky
Wed Apr 18, 2018 5:38 am
Forum: software: games - high scores
Topic: Different idea for highscore season
Replies: 5
Views: 264

Re: Different idea for highscore season

If they care about overall score, then there is an advantage to playing more/all versions, but if you just don't like a game, you only have to wait a fortnight and only miss one score.
Anyway, it was just an idea, I'm not attached to it and don't usually get time to play.
by tricky
Tue Apr 17, 2018 10:17 pm
Forum: software: new games
Topic: New version of Centipede for the BBC Micro (in progress)
Replies: 48
Views: 3410

Re: New version of Centipede for the BBC Micro (in progress)

I use a mode7 double height text menu for the shows I do with my games and an option for the STH archive.
There was some talk at one point of a retro software release, but as they are not licensed, I doubt that will happen.
Did you notice that I added your splash screen to phoenix?
by tricky
Tue Apr 17, 2018 7:23 pm
Forum: software: new games
Topic: Time for Zarch .... on the beeb?!
Replies: 9
Views: 394

Re: Time for Zarch .... on the beeb?!

Just 1 and 2, I think the beeb author did 3 themselves, but I think 1 & 2 may have been held back until 3 was ready.
by tricky
Tue Apr 17, 2018 7:20 pm
Forum: emulators
Topic: B-Em
Replies: 357
Views: 18388

Re: B-Em

Oops, teletext colours are wrong, maybe NuLA isn't implemented correctly! - not that Centipede uses it!
Testing with the attached centipede build.
by tricky
Tue Apr 17, 2018 7:15 pm
Forum: emulators
Topic: B-Em
Replies: 357
Views: 18388

Re: B-Em

That is running. Is there an easy way to get the "beeb" layout keyboard? @ is * # is ] actually, it looks like it might only be those two. Is there a way to redefine the BREAK key? It doesn't recognise my joystick (HORI Fighting stick - PS3) and there doesn't seem to be an option to enable...
by tricky
Tue Apr 17, 2018 6:14 pm
Forum: emulators
Topic: B-Em
Replies: 357
Views: 18388

Re: B-Em

And libstdc++-6.dll
by tricky
Tue Apr 17, 2018 6:00 pm
Forum: software: new games
Topic: Time for Zarch .... on the beeb?!
Replies: 9
Views: 394

Re: Time for Zarch .... on the beeb?!

I think Gil had plans and maybe a demo for solid ground Zarch on the Speccy, but my memory seems to have missed a few refresh cycles!
by tricky
Tue Apr 17, 2018 5:21 pm
Forum: emulators
Topic: B-Em
Replies: 357
Views: 18388

Re: B-Em

Just trying the above link for joystick support.
b-em won't start, the dialog says:
This program can't start because libgcc_s_dw2-1.dll is missing...

PS Maybe statically link it? I know it is wasteful on linux, but the less DLLs the better on Windows.
by tricky
Tue Apr 17, 2018 1:08 pm
Forum: software: classic games
Topic: Is there a list of games that use co-pros?
Replies: 14
Views: 515

Re: Is there a list of games that use co-pros?

I don't know if you have seen some of my "emulators" that run original arcade ROMs (6502 based) on the BBC micro and then patch them to use the beebs sound, joystick, display, but I wanted to add a few more that were mostly z80 based. Most of these early games ( Sprint , Circus , Warlords ...
by tricky
Tue Apr 17, 2018 12:49 pm
Forum: software: games - high scores
Topic: Different idea for highscore season
Replies: 5
Views: 264

Re: Different idea for highscore season

I would be a little wary of comparing some of the BBC games to the arcade originals, but I like the idea in general. A similar option would be to allow the arcade and all BBC ports (maybe even Electron and Atom) of the same game and use a scoring system similar to pinball (as I was listening to a po...
by tricky
Mon Apr 16, 2018 9:15 pm
Forum: general
Topic: Remarkable videos recently posted on Youtube
Replies: 146
Views: 14317

Re: Remarkable videos recently posted on Youtube

I enjoyed it, and people should be informed :)
by tricky
Sun Apr 15, 2018 10:30 pm
Forum: introduce yourself
Topic: New guy
Replies: 16
Views: 357

Re: New guy

Welcome, You might be interested in beebasm which can be found at our old site http://www.retrosoftware.co.uk/wiki/index.php?title=Main_Page , along with some other useful stuff. For assembler and low level knowledge, The Advanced User Guide is great. We also love to share our knowledge. If you want...
by tricky
Sun Apr 15, 2018 5:06 pm
Forum: hardware
Topic: Sideways RAM on the BBC Micro
Replies: 39
Views: 1150

Re: Sideways RAM on the BBC Micro

Sorry, I don't do much debugging on real hardware nowadays. I use beebasm on the PC to cross assemble (produces files or .ssd disc images). And the debuggers in beebem and b-em to disassemble. There is beebdis http://stardot.org.uk/forums/viewtopic.php?f=12&t=14902&p=199897&hilit=beebdis...