Search found 2376 matches

by tricky
Fri May 25, 2018 5:31 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 1 to 3 June 2018 (near Camberley)
Replies: 11
Views: 492

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

The solder is this type, but there are also some 0.7mm.
solder.jpg
solder_tray.jpg
solder_tray.jpg (41.17 KiB) Viewed 72 times
by tricky
Fri May 25, 2018 5:16 pm
Forum: introduce yourself
Topic: Hi from London
Replies: 9
Views: 72

Re: Hi from London

Welcome, that's a nice selection.
What sort of embedded software do you do if you can say.
by tricky
Fri May 25, 2018 8:37 am
Forum: hardware
Topic: BBC/Master Power Supply Adjustment
Replies: 11
Views: 196

Re: BBC/Master Power Supply Adjustment

I adjusted mine a few days ago. I wasn't sure if they were susceptible to giving out random voltages, like you hear if you turn an old volume control after many years of disuse. With the power off, I twiddled the pos about a bit, leaving it turned down slightly from where it was before turning it ba...
by tricky
Tue May 22, 2018 8:08 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 1 to 3 June 2018 (near Camberley)
Replies: 11
Views: 492

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

I've got some leaded solder to make available to forum members at the ABUG meetups, donated by FordP. The spools (is that the correct term?) will be available for donations to support stardot. To give as many people as possible a chance to share in FordP's generosity, I think we should limit them to...
by tricky
Tue May 22, 2018 7:54 pm
Forum: hardware
Topic: Connecting SEGA Mega Drive controllers to the beeb
Replies: 31
Views: 1638

Re: Connecting SEGA Mega Drive controllers to the beeb

I've now made up one of each cable from the boards in the Today I received thread. cable_insides.jpg Assembled adapter with switch to change between one fire button on each controller or two on one controller (with the LPTSB hack from the Warlords thread, two fire buttons on each controller can be u...
by tricky
Tue May 22, 2018 5:46 am
Forum: general
Topic: Acorn machines in the movies / TV
Replies: 38
Views: 3501

Re: Acorn machines in the movies / TV

Nice anecdote, hope you liked Dr who.
by tricky
Mon May 21, 2018 11:48 am
Forum: introduce yourself
Topic: Hi
Replies: 8
Views: 240

Re: Hi

Welcome
by tricky
Sun May 20, 2018 7:24 am
Forum: hardware
Topic: Screaming CUB monitors
Replies: 8
Views: 296

Re: Screaming CUB monitors

Coincidentally my daughter played that for me on friday evening, we both hear laury, but she still complains about my TVs. :lol:
by tricky
Sat May 19, 2018 8:31 pm
Forum: software: classic games
Topic: How many versions of Frogger were there?
Replies: 7
Views: 341

Re: How many versions of Frogger were there?

Nice, but you cut the crock a bit close ;)

You can see how someone did something in a post by clicking the quote button, which then shows you the source.
by tricky
Sat May 19, 2018 6:23 pm
Forum: hardware
Topic: Screaming CUB monitors
Replies: 8
Views: 296

Re: Screaming CUB monitors

I don't know about CUBs, but my daughter complains whener I turn on any of my CRTs.
I remember when I was a kid, I could hear most CRTs, but some would start and stop, I don't know why.
by tricky
Sat May 19, 2018 6:21 pm
Forum: emulators
Topic: Video Timing
Replies: 31
Views: 1221

Re: Video Timing

Good news, Frogger should be correct for 50hz non-interlaced, but maybe the TV doesn't like non-interlaced at 50hz. It may also be h-sync/v-sync timing that it isn't keen on, I'll try and find some docs. In other news, I found another type of 6845 behavior today. In frogger, only the first scanline ...
by tricky
Sat May 19, 2018 2:37 pm
Forum: introduce yourself
Topic: Hello from Australia
Replies: 11
Views: 248

Re: Hello from Australia

Welcome
by tricky
Thu May 17, 2018 6:31 pm
Forum: general
Topic: Today I received.....
Replies: 4591
Views: 303096

Re: Today I received.....

My boards are here from JLCPCB. 30 dual Atari joystick to beeb and 10 dual megadrive to beeb adapters boards, shame I'm away for the weekend at Revival and probably won't get to build any. boards.jpg The mega drive ones support 1 button each or 2 buttons on one or with software support (see Warlords...
by tricky
Thu May 17, 2018 5:51 am
Forum: hardware
Topic: Fixed it!
Replies: 3
Views: 220

Re: Fixed it!

I use the cut off legs from fitted x2 caps to lie where a track has been broken from one hole back to the nearest through hole component or even resistor legs for lighter work.
by tricky
Wed May 16, 2018 10:20 pm
Forum: emulators
Topic: Video Timing
Replies: 31
Views: 1221

Re: Video Timing

I think it must be a shadow ram issue.
Try turning shadow Ram off.

Ps I did put code in for WE Shadow ram, but as I had never had a master, assumed that Shadow ram was of by default.
by tricky
Wed May 16, 2018 6:11 pm
Forum: software: classic games
Topic: How many versions of Frogger were there?
Replies: 7
Views: 341

Re: How many versions of Frogger were there?

I have a vague recollection of a type in, but that's all :oops:
Are you planning a comparison video for YouTube?
by tricky
Tue May 15, 2018 9:26 pm
Forum: introduce yourself
Topic: Hello!
Replies: 9
Views: 217

Re: Hello!

Welcome, we usually warn people about the caps, but it seems you don't need warning ;)
Have you found bbcmicro.co.uk yet?
by tricky
Mon May 14, 2018 9:47 pm
Forum: emulators
Topic: Video Timing
Replies: 31
Views: 1221

Re: Video Timing

PS, if R12/13 aren't latched as I expect, scramble will look very wrong.
by tricky
Mon May 14, 2018 9:37 pm
Forum: software: new games
Topic: New version of Scramble for the beeb (just starting)
Replies: 34
Views: 1661

Re: New version of Scramble for the beeb (just starting)

Scan line 6 works, 7 doesn't as it messes up the vsync by seemingly adding a whole 127 row frame (until the counter wraps). It looked like when it didn't work, that it still had 1 line frames, but it could be that the 127 rows vere just blank and the correct images was only showing some of the time....
by tricky
Mon May 14, 2018 7:31 pm
Forum: emulators
Topic: Video Timing
Replies: 31
Views: 1221

Re: Video Timing

We know from Frogger that there are at least two different 6845s in Masters, unless several have been replaced.
The issue where the last line of the display has rubbish in it and then an additional scan line with more rubbish.
This only occurred on some masters, but not on any Model Bs AFAIK.
by tricky
Mon May 14, 2018 7:17 pm
Forum: software: new games
Topic: New version of Scramble for the beeb (just starting)
Replies: 34
Views: 1661

Re: New version of Scramble for the beeb (just starting)

Moving R4=0 to the previous scan line (6) fixes the issue, but as far as I can tell, anywhere on the last line (7) causes the problem. What makes this hard to understand, is that even only doing it on the first row (not every interrupt) doesn't work, but does set the rows per frame to 0. So, it seem...
by tricky
Mon May 14, 2018 2:52 pm
Forum: software: new games
Topic: New version of Scramble for the beeb (just starting)
Replies: 34
Views: 1661

Re: New version of Scramble for the beeb (just starting)

Visual 6502 have a 6845 in their queue but haven't started decapping it yet.
I don't think Frogger set it near the beginning of the line, but scramble may be seeing it around the end of the horizontal display.
by tricky
Mon May 14, 2018 12:14 pm
Forum: software: new games
Topic: New version of Scramble for the beeb (just starting)
Replies: 34
Views: 1661

Re: New version of Scramble for the beeb (just starting)

Thanks guys. RichTW, I think you are correct about somehow missing the end of frame, this would happen if rows were set to 0 before the 6845 had finished the previous frame. Hoglet, thanks, my scope is a cheap USB only thing, but has been useful. I'm reassured that it works on beebfpga, as I suspect...
by tricky
Mon May 14, 2018 5:50 am
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 65
Views: 3757

Re: RGB to HDMI using a Pi Zero and a small CPLD

Does this project have enough debug info to help with a problem that I am having in this Scramble thread viewtopic.php?f=57&t=14988&p=203125#p203125?
by tricky
Mon May 14, 2018 5:46 am
Forum: software: new games
Topic: New version of Scramble for the beeb (just starting)
Replies: 34
Views: 1661

Re: New version of Scramble for the beeb (just starting)

I was fully setting the background colour and back between the r12/13 sets, so it wasn't tight at all. I tried a few selections for sync pulse widths in case that was the problem. Everything should be the same as frogger at the end of the frame, just less updates during the frame. I'll check if frog...
by tricky
Sun May 13, 2018 8:06 pm
Forum: software: new games
Topic: New version of Scramble for the beeb (just starting)
Replies: 34
Views: 1661

Re: New version of Scramble for the beeb (just starting)

I did try a few each way, but they just roll and the scope can't find the vsync.
by tricky
Sun May 13, 2018 4:42 pm
Forum: software: new games
Topic: New version of Scramble for the beeb (just starting)
Replies: 34
Views: 1661

Re: New version of Scramble for the beeb (just starting)

Sorry Rich, i was hoping you would come to the rescue but I must be missing something.
There are 28 visible with the last line being the first of the last frame's 12 lines (27+12=39).
I'm missing something with the 26+24=39!
by tricky
Sun May 13, 2018 1:02 pm
Forum: introduce yourself
Topic: Hello :)
Replies: 9
Views: 248

Re: Hello :)

Welcome.
You might like to search for beebwiki.
by tricky
Sun May 13, 2018 12:56 pm
Forum: hardware
Topic: sideways Ram
Replies: 8
Views: 197

Re: sideways Ram

I'm not familiar with ComStar, but you could try space+bread or d+break or load another copy of basic over the top of ComStar until you want it again.
by tricky
Sun May 13, 2018 11:53 am
Forum: software: new games
Topic: New version of Scramble for the beeb (just starting)
Replies: 34
Views: 1661

Re: New version of Scramble for the beeb (just starting)

I'm a bit stuck / my 6845 foo is failing me :( I am trying to have the screen setup similar to Frogger, but with half the interrupts. b-em, beebem and jsbeeb (great 6845 debugging info) all seem to agree that this should work and produce a stable image. My TV and silly scope (I'm not that good at dr...