Search found 157 matches

by joachim
Sun Jul 07, 2019 5:40 pm
Forum: software: other
Topic: Basic BASIC Question
Replies: 28
Views: 791

Re: Basic BASIC Question

And for some reason, people seemed to mostly use 224-255 to refer to them... I investigated this a while ago. The User Guide recommends use of the range 224–225 in chapters 29 and 34, and presumably most people's practices ultimately derive from that. Also, on OS 0.10 , 224–255 are the values retur...
by joachim
Tue Jun 04, 2019 2:59 pm
Forum: software: classic games
Topic: Acorn Electron Games that don't work with a plus 1 ?
Replies: 11
Views: 565

Re: Acorn Electron Games that don't work with a plus 1 ?

Line 30 looks a bit suspicious. I think it should read something like:

30 !&80=USR&FFF4:A%=!&81:A%?12=0
by joachim
Wed Apr 24, 2019 7:36 pm
Forum: software: other
Topic: Drawing a circle in BBC BASIC
Replies: 50
Views: 2681

Re: Drawing a circle in BBC BASIC

Logically, if anybody implemented ellipse arcs, sectors, and segments, those are the plot numbers that should be used. Interesting. Have you given any thought to how elliptical arcs, sectors and segments would be specified using only three points (I presume it's a fundamental characteristic of VDU ...
by joachim
Mon Apr 15, 2019 10:21 pm
Forum: other vintage computer hardware, software and games
Topic: Interesting treasures in shops near you?
Replies: 3
Views: 378

Re: Interesting treasures in shops near you?

Well, there's a couple of classic machines in this window: https://goo.gl/maps/LjgQ6qSTiy42. Is that the sort of thing you had in mind?
by joachim
Wed Feb 27, 2019 9:35 pm
Forum: archive requests
Topic: The Micro User 1991/1992; Let's Compute Game articles..
Replies: 4
Views: 367

Re: The Micro User 1991/1992; Let's Compute Game articles..

I dumped all the Electron user cassettes back in 2001/2003: http://www.stairwaytohell.com/electron/uefarchive/magtapes/ElectronUser/ Though Mick, Lee and team may well have already gone through these already ... I asked about the (lack of) Electron User games on bbcmicro.co.uk just over a year ago:...
by joachim
Fri Feb 22, 2019 8:46 pm
Forum: for sale / freebies
Topic: Free to collector
Replies: 18
Views: 1150

Re: Free to collector

Agreed those are 128kB roms. The type numbers (531000, 831000, 231024) end in "1000" or "1024" most likely signifying 1Mbit = 128kB, and Google search for those numbers and "rom" appears to confirm that. (Also, here are some people talking about dumping similar 128kB roms using an EPROM programmer: ...
by joachim
Wed Jan 30, 2019 4:10 am
Forum: general
Topic: Old Usbourne books, free PDFs from Usbourne!
Replies: 30
Views: 3615

Re: Old Usbourne books, free PDFs from Usbourne!

Okay, here is the type-in. I tested it a little in RPCemu (of all things), so it should be free from typos ... but I don't have it as an .ssd image so I'm just attaching it as text (as formatted by !Edit). (I fixed at least two vital typos in the printed listing, too: line 200 and line 650. Now I'm ...
by joachim
Tue Jan 29, 2019 5:01 pm
Forum: general
Topic: Old Usbourne books, free PDFs from Usbourne!
Replies: 30
Views: 3615

Re: Old Usbourne books, free PDFs from Usbourne!

It's an awful font for listings, too, but I think they're readable if you enlarge them to full size and apply a little skill and judgement. I could type it in myself if you like, although I may or may not be able to rig up the technology to tokenize and test a BASIC listing and transfer the result t...
by joachim
Tue Jan 29, 2019 5:33 am
Forum: general
Topic: Old Usbourne books, free PDFs from Usbourne!
Replies: 30
Views: 3615

Re: Old Usbourne books, free PDFs from Usbourne!

Another Usborne book was "Understanding Computer Graphics" by Judy Tatchell and Les Howarth, and it includes a game, "Bouncing Bug", which would merit a place on bbcmicro.co.uk. I don't know why this particular book is not available on the Usborne PDF download page, but I just happen to have scans o...
by joachim
Sun Dec 16, 2018 3:37 am
Forum: software: classic games
Topic: Deathstar "inbuilt cheat"
Replies: 0
Views: 432

Deathstar "inbuilt cheat"

Micro User and Electron User respectively published cheat keys for the BBC and Electron versions of Deathstar. Copied here from the STH cheats page : [BBC version] If you press Caps Lock + Control + Escape you will be promoted to the next level. You still have your current quota of starbombs, but th...
by joachim
Sat Oct 20, 2018 2:07 am
Forum: general
Topic: Best Basic Games
Replies: 12
Views: 774

Re: Best Basic Games

Manic Mole is one of the first BBC/Electron games I ever had so I could be biased, but it's an all-Basic platformer that runs very nicely. Possibly the only game that manages to run at a playable speed in VDU 5 mode …
by joachim
Sun Oct 14, 2018 9:52 am
Forum: bbcmicro.co.uk
Topic: Game information - help required
Replies: 23
Views: 1667

Re: Game information - help required

Gladiator displays "(C) BEEBUG" when it starts. And the listing of Sea Battle contains the notice "(C) YOUR COMPUTER". And the loader for Millipede has an Acornsoft copyright notice (unless you think it's another fake like Crazy Balloon). And the listing of "Caves of Trall" contains some comments in...
by joachim
Sun Oct 14, 2018 9:17 am
Forum: software: classic games
Topic: Favourite/best games list
Replies: 88
Views: 18221

Re: Favourite/best games list

Top ten: Elite Dunjunz Ricochet (I can't believe this isn't in anyone's list) Exile Imogen Repton 3 Citadel Repton Infinity Jet Set Willy Thrust The next dozen: (because it was so hard to choose) Galaforce 2, Galaforce, Bonecruncher, Repton, The Sentinel, Spycat, XOR, Inertia, Ravenskull, Pipeline,...
by joachim
Sat Oct 13, 2018 7:01 pm
Forum: software
Topic: Combining sprites in RiscOS
Replies: 4
Views: 636

Re: Combining sprites in RiscOS

Just in case anyone wants to construct a general solution, the sprite file format is (obliquely) documented in the PRMs at http://www.riscos.com/support/developers/prm/sprites.html. (Note in "Technical Details", the sentence "The format of the file created by a *ScreenSave or *SSave command is the s...
by joachim
Fri Oct 12, 2018 10:31 pm
Forum: programming
Topic: The book of listings -Numbfinger
Replies: 7
Views: 540

Re: The book of listings -Numbfinger

well, I will be deciphering that one a bit further down the line. It actually just calls *FX 122 in a loop until it gets back the value 255. It looks scary because although Acorn provided *FX as a friendly way of making OS calls, they didn't provide any nice way of reading the result of an OS call ...
by joachim
Fri Oct 12, 2018 4:25 pm
Forum: programming
Topic: The book of listings -Numbfinger
Replies: 7
Views: 540

Re: The book of listings -Numbfinger

Right, now I look at the whole listing I agree with you: line 230 to ignore previous input is OK but line 240 is getting a keypress and throwing it away, which is obviously wrong at this point in the program. (My line 240 above also does that, because I didn't look at the context.) If I were writing...
by joachim
Thu Oct 11, 2018 7:42 pm
Forum: programming
Topic: The book of listings -Numbfinger
Replies: 7
Views: 540

Re: The book of listings -Numbfinger

240 waits for a key to be pressed before advancing. 230 is supposed to make sure that the user doesn't accidentally advance due to either (i) having a key already held down when line 240 is reached or (ii) having previously pressed a key which is still in the keyboard buffer. I think preventing (i) ...
by joachim
Fri Sep 21, 2018 4:33 pm
Forum: bbcmicro.co.uk
Topic: author name correction
Replies: 6
Views: 700

Re: author name correction

Great! I didn't notice there was "Stephen Martin" as well but what you've done sounds exactly right. The only thing that could possibly be better is assigning each author an ID number and page so that the user can distinguish between people with potentially similar names, as everygamegoing tries to ...
by joachim
Fri Sep 21, 2018 2:07 am
Forum: bbcmicro.co.uk
Topic: author name correction
Replies: 6
Views: 700

author name correction

I just thought I'd point out that Get Set Santa by S. Martin (http://bbcmicro.co.uk/game.php?id=1410) is very obviously by the same author as Super Digga by Steve Martin (http://bbcmicro.co.uk/game.php?id=1583), seeing as the screen layout in the screenshots is identical (including author attributio...
by joachim
Fri Aug 31, 2018 7:45 pm
Forum: archive requests
Topic: Instructions wanted for Andrew Flintham games
Replies: 2
Views: 378

Re: Instructions wanted for Andrew Flintham games

You could try contacting Andrew through his domain level7.org.uk (although it hasn't been updated in years so who knows).
by joachim
Sat Aug 11, 2018 5:38 pm
Forum: introduce yourself
Topic: Hello!
Replies: 17
Views: 859

Re: Hello!

We played some sort of maths game that involved trains on it if I remember correctly! I realise you didn't ask, but if your game was TRAINS from the Microprimer collection — a classroom favourite when I was in primary school, slightly longer ago — then it's on BBC PD disc 159 which you can download...
by joachim
Mon Jul 16, 2018 2:27 pm
Forum: software: classic games
Topic: Mystery of the missing Exile mail-in cards
Replies: 7
Views: 1119

Re: Mystery of the missing Exile mail-in cards

I certainly didn't get these cards with either of my Exiles, one of which came free with a year's subscription to Micro User . (The other was second-hand so it's not conclusive.) I did get mail-in cards with my Repton Infinity, which came either from Impact Games or another discount mail-order compa...
by joachim
Sun Jun 17, 2018 4:47 pm
Forum: programming
Topic: English wordlist checker
Replies: 2
Views: 297

Re: English wordlist checker

Yes! I initially didn't see how to combine stemming with the Bloom filter lookup without using more memory, but I think it's workable. You would have entries in the wordlist with special characters, for example "FILTER*" means filter and filters and filtering and filtered. Then when the lookup code ...
by joachim
Sun Jun 17, 2018 1:40 am
Forum: programming
Topic: English wordlist checker
Replies: 2
Views: 297

English wordlist checker

BITD "everyone knew" that if you implemented a game like Scrabble or Boggle, it wasn't practical to include a full English wordlist — there just isn't memory to have a list that's complete enough to be convincing. I started thinking about how well you could solve this problem with Bloom filters — th...
by joachim
Wed Jun 13, 2018 4:40 pm
Forum: software: classic games
Topic: Most disappointing conversions from other systems
Replies: 62
Views: 5598

Re: Most disappointing conversions from other systems

Footballer of the Year was notorious because versions for other systems had an arcade action component that was totally missing in the BBC/Electron conversion … despite the promises of the cassette inlay. At one point there was a letter complaining about this in Electron User (https://archive.org/s...
by joachim
Wed Jun 13, 2018 4:28 pm
Forum: software: classic games
Topic: Trying to locate old game "Caves"
Replies: 7
Views: 756

Re: Trying to locate old game "Caves"

It was a graphic adventure with enemies that would drain your health and leave debris if you walked into them, meaning you'd have to walk around the debris or leave and come back for it to disappear. There was an upper level of the maze and a lower level, and you had to collect four items on the up...
by joachim
Mon May 07, 2018 8:47 pm
Forum: hardware
Topic: Resurrect BBC Micro
Replies: 6
Views: 541

Re: Resurrect BBC Micro

Thanks for the link. I tried setting the jumper too south and the machine won't boot. Long beep sound. Oh right, on closer examination of the documentation for S25 (see also another good thread about bad RAM, http://stardot.org.uk/forums/viewtopic.php?t=2190&start=30), that's what we'd expect, beca...
by joachim
Mon May 07, 2018 6:20 pm
Forum: hardware
Topic: Resurrect BBC Micro
Replies: 6
Views: 541

Re: Resurrect BBC Micro

The images help a lot! It looks as if the character generator is getting a bad value for bit 4 of each character (bit 4 = 1 most of the time when it should be 0). Thus space becomes '0', "BBC" becomes "RRS" and so forth. Although it looks as if the correct values are also flickering in and out. This...
by joachim
Thu Apr 19, 2018 12:23 am
Forum: software: new games
Topic: Maze of Madness
Replies: 27
Views: 4677

Re: Maze of Madness

Oh, my goodness, that is evil. Like others, I found a loophole to win the game the first time, but suspected it wasn't the real solution because it didn't seem to match up with the in-game HINTs. (Although now, having solved the puzzle properly, I don't think the hints ended up helping me much.)