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by tricky
Thu Nov 23, 2017 7:00 am
Forum: upcoming and recent events & exhibitions
Topic: ABug Manchester Friday 19th - Sunday 21st January 2018
Replies: 21
Views: 470

Re: ABug Manchester Friday 19th - Sunday 21st January 2018

It's probably too far for me, but no kit might be possible, maybe getting their on Thursday for an evening at Arcade club
by tricky
Wed Nov 22, 2017 7:49 am
Forum: hardware
Topic: ZX81 emulator
Replies: 29
Views: 684

Re: ZX81 emulator

Is there a 16 palette 1bpp 4pixel per byte mode?
Or room for one?
by tricky
Wed Nov 22, 2017 7:41 am
Forum: emulators
Topic: Emulator support for VideoNuLA
Replies: 48
Views: 2715

Re: Emulator support for VideoNuLA

3 gets eaten, or only sent to DFS, but as you say there are other options.
The master changed the service calls, and I haven't looked at the compact.
by tricky
Tue Nov 21, 2017 7:47 am
Forum: hardware
Topic: ZX81 emulator
Replies: 29
Views: 684

Re: ZX81 emulator

Thanks Thomas for a nice little read.
by tricky
Tue Nov 21, 2017 7:44 am
Forum: off-topic
Topic: Grump grump grump
Replies: 14
Views: 353

Re: Grump grump grump

Hope your holidays turn out better.
by tricky
Mon Nov 20, 2017 10:31 pm
Forum: hardware
Topic: ZX81 emulator
Replies: 29
Views: 684

Re: ZX81 emulator

Well done Rob.
by tricky
Fri Nov 17, 2017 1:57 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 139
Views: 4406

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

I won't be there until tomorrow morning, but hopefully will be bringing a CRT-TV to fix dropping the RGB, a couple of beebs which fry their MMCs, a working setup to play with and a laptop to continue development of my new Centipede game which I have been neglecting recently.
by tricky
Fri Nov 17, 2017 1:53 pm
Forum: software: other
Topic: Updated - BBC Micro .MMB
Replies: 42
Views: 2564

Re: Updated - BBC Micro .MMB

My memory is a little hazy on that menu system. !BOOT is the automatically EXECuted file when the disc is "booted", but if there is room, you could add any file and point the menu at it. If it is *EXECed you could prepend your stuff, or if it is CHAINed, you could add a check at the beginn...
by tricky
Fri Nov 17, 2017 1:47 pm
Forum: for sale / freebies
Topic: Thinking of selling some of my collection...
Replies: 7
Views: 219

Re: Thinking of selling some of my collection...

Nice collection, can only really reiterate eBay, average the last few "sold" listings.
by tricky
Wed Nov 15, 2017 6:31 pm
Forum: projects
Topic: Starting a Prince of Persia port...
Replies: 140
Views: 8601

Re: Starting a Prince of Persia port...

You and stardot got a mention on "The Retro Hour" podcast, they seemed very impressed that PoP could be done on a beeb and said that they should do more episodes on the beeb as it was such a big part of the UK retro computer history.
by tricky
Tue Nov 14, 2017 11:40 pm
Forum: projects
Topic: Source for an old Centipede game I wrote in '82
Replies: 26
Views: 1615

Re: Source for an old Centipede game I wrote in '82

I also had a cunning thought about the ships getting left behind - remove any yellow from the bottom quarter of the screen from BASIC :lol:
by tricky
Tue Nov 14, 2017 11:35 pm
Forum: programming
Topic: 6502 Stack
Replies: 8
Views: 344

Re: 6502 Stack

lda &101,x 4 cycles 3 bytes
lda (&70),y 5 cycles 2 bytee
lda (&70,x) 6 cycles 2 bytee

In the end I didn't need the address as I did know whether I was running from ROM or *RUNning.
by tricky
Tue Nov 14, 2017 11:32 pm
Forum: off-topic
Topic: Acorn Art Thread
Replies: 133
Views: 6360

Re: Acorn Art Thread

Not as much as having the image be 640 x 512 in 4 colours!
by tricky
Tue Nov 14, 2017 11:25 pm
Forum: software: new games
Topic: New version of Frogger (was: A demo of what is looking like a new Frogger for the beeb)
Replies: 120
Views: 12199

Re: New version of Frogger (was: A demo of what is looking like a new Frogger for the beeb)

I have been trying to make a version of frogger that can be *RUN or loaded into SWR (RAM or EPROM) and the result is attached (r.frogger). I seem to have broken it a bit, in that it now has flicker which it didn't have before, so I have some debugging to do! :x This version can be used with keyboard...
by tricky
Tue Nov 14, 2017 5:21 pm
Forum: programming
Topic: 6502 Stack
Replies: 8
Views: 344

Re: 6502 Stack

I wrote a similar version of that last night, as I am making ROM versions of my games, but wanted them to be *RUNable too and the decompression code needs to know where to decompress from. I picked &70..74 :) for my decompression workspace, and put the tax etc there too.
by tricky
Sun Nov 12, 2017 5:53 pm
Forum: hardware
Topic: Building a BBC
Replies: 5
Views: 311

Re: Building a BBC

Wiggle any chips to clean their legs, swap the 6522s, suspect faulty ram is where I am with beebs now. There are loads of troubleshooting threads around here, but if you can burn an EPROM, you could try my os replacement ROM and see what you get.
by tricky
Sun Nov 12, 2017 10:28 am
Forum: hardware
Topic: Beeb Repair
Replies: 7
Views: 347

Re: Beeb Repair

My (I think) Watford ZIF in my issue 3 has the ZIF above the plastic with the PCB below, so requires desoldering to install/remove it.
by tricky
Sat Nov 11, 2017 8:10 am
Forum: software: classic games
Topic: "Unfixable bug" in BBC B Elite
Replies: 54
Views: 3130

Re: "Unfixable bug" in BBC B Elite

Welcome Ian and thanks for your contributions.
by tricky
Sat Nov 11, 2017 7:56 am
Forum: introduce yourself
Topic: Hello, I am a keen acorn owner and hope to take part in the forum.
Replies: 12
Views: 343

Re: Hello, I am a keen acorn owner and hope to take part in the forum.

Welcome, looking forward to hearing your plans and progress.
by tricky
Sat Nov 11, 2017 7:23 am
Forum: hardware
Topic: Fast serial port/SD card adapter for the 1MHz Bus
Replies: 2
Views: 185

Re: Fast serial port/SD card adapter for the 1MHz Bus

Very nice, I was thinking about something similar in the week. I was thinking MMC but with options for some combination of user port/ADC/speech/D2A. The main difference is that I would g never have got mine made.
Well done =D>
by tricky
Fri Nov 10, 2017 7:17 pm
Forum: introduce yourself
Topic: Just an Intro
Replies: 10
Views: 224

Re: Just an Intro

Welcome,
we like photos, especially of working beebs ;)
Have you tried assembler on the beeb?
by tricky
Fri Nov 10, 2017 7:14 pm
Forum: introduce yourself
Topic: 30 Years On...
Replies: 9
Views: 217

Re: 30 Years On...

Welcome,
Learning assembler on the beeb, or beebasm for larger projects.
by tricky
Fri Nov 10, 2017 7:27 am
Forum: archive requests
Topic: Computer Concepts 'Text to Speech' Manual
Replies: 6
Views: 196

Re: Computer Concepts 'Text to Speech' Manual

I spent quite a while looking about a year ago, but all I found was the demo program on the disc - I think. I like the cc speech, it doesn't require a serial ROM, nor the board to be modded when adding the speech processor. My daughter, 10 at the time spent a couple of hours adding words to a little...
by tricky
Wed Nov 08, 2017 9:37 pm
Forum: hardware
Topic: Beeb to SCART Aspect ratio switching?
Replies: 8
Views: 278

Re: Beeb to SCART Aspect ratio switching?

This says that the Impedance of pin 8 (aspect ratio) is > 10K ohms.
by tricky
Wed Nov 08, 2017 1:49 pm
Forum: hardware
Topic: Beeb to SCART Aspect ratio switching?
Replies: 8
Views: 278

Re: Beeb to SCART Aspect ratio switching?

Thanks, they are smaller and cheaper than last time I looked, but I am still tempted to fit it in the CRT ;)
by tricky
Wed Nov 08, 2017 6:45 am
Forum: hardware
Topic: Beeb FPGA
Replies: 378
Views: 22779

Re: Beeb FPGA

I'm sure Hoglet will be along with a better answer, but most software emulators at some point have had a bug latching the channel correctly.
by tricky
Wed Nov 08, 2017 6:41 am
Forum: hardware
Topic: Beeb to SCART Aspect ratio switching?
Replies: 8
Views: 278

Re: Beeb to SCART Aspect ratio switching?

I was thinking about it as my first CRT requires changing every time and somewhere around here, three is a discussion between Mark, myself and maybe others, but the conclusion was to use one of the methods you state. I haven't bothered to do anything as all my other CRTs are old enough to not know w...
by tricky
Tue Nov 07, 2017 9:05 pm
Forum: upcoming and recent events & exhibitions
Topic: London Show / Saturday 28th October 2017
Replies: 27
Views: 1374

Re: London Show / Saturday 28th October 2017

My work in progress centipede on the left, not sure about the one on the right, but Rob did have a series of pictures showing on his Nula some of the time.

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