Search found 135 matches

by joachim
Mon Jul 16, 2018 2:27 pm
Forum: software: classic games
Topic: Mystery of the missing Exile mail-in cards
Replies: 4
Views: 263

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: 117

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: 117

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: 4239

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: 382

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: 308

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: 308

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: 26
Views: 2263

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.)
by joachim
Thu Mar 22, 2018 2:25 am
Forum: bbcmicro.co.uk
Topic: Games that don't work in jsbeeb
Replies: 32
Views: 3607

Re: Games that don't work in jsbeeb

Southern Belle and Evening Star only 99% work in jsbeeb from the "Play" link. The bug is that if you start the game then hit 'T' to display the timetable screen, half of the bottom line of text is cut off. Playing at godbolt.org with the STH disc image doesn't have this problem, so I assume it's due...
by joachim
Wed Mar 21, 2018 3:32 pm
Forum: programming
Topic: BBC Changing Coordinate system from 0-1024,0-1280
Replies: 12
Views: 665

Re: BBC Changing Coordinate system from 0-1024,0-1280

You could intercept OSWRCH, and rescale the coordinates any time you see VDU 25 (or 24 or 29, if you care about those). I don't think there's a simpler way.
by joachim
Fri Feb 16, 2018 10:27 pm
Forum: general
Topic: Computer Shops From Back In The Day
Replies: 92
Views: 8700

Re: Computer Shops From Back In The Day

chinnyhill10 wrote:moved the counter to the opposite wall. This was an attempt to turn around
That's not what "turn a failing business around" usually means …
by joachim
Wed Feb 07, 2018 7:32 pm
Forum: archive submissions
Topic: SLID
Replies: 8
Views: 1026

Re: SLID

I see SLID is now on bbcmicro.co.uk — thanks Lee/Mick? I thought of one more possible correction — it runs rather slowly on the original model B, which is funny because there's a deliberate delay in line 140: 140 A = INKEY(12):IF A=44 THEN D=D-1*8*(D=0) I suspect that the 12 here is another change t...
by joachim
Wed Jan 24, 2018 9:52 pm
Forum: emulators
Topic: MODE 7 on RISC OS BBC Emulator 6502em
Replies: 15
Views: 1024

Re: MODE 7 on RISC OS BBC Emulator 6502em

That probably suggests that !6502Em is working properly. I'm not sure what happens on a real Beeb if you issue COLOUR commands in Mode 7, either it issues the VDU sequence but nothing happens, or it suppresses the VDU sequence because it's in Mode 7. It issues the VDU sequence with (usually) no not...
by joachim
Mon Jan 01, 2018 2:25 am
Forum: archive submissions
Topic: SLID
Replies: 8
Views: 1026

Re: SLID

Maybe it was true in OS 0.10 though? Or at least it was the way they were thinking at the time — that would explain the earlier User Guide entries. Which set of values does OSBYTE 135 return in OS 0.10?) Turns out richardtoohey in this thread confirmed my suspicions: the 224–255 range is returned i...
by joachim
Mon Jan 01, 2018 12:33 am
Forum: archive submissions
Topic: Acorn User 1-liner games.
Replies: 2
Views: 304

Re: Acorn User 1-liner games.

leenew wrote:Game 5, Zander, may be a joke which doesn't do anything game-like!
It's parodying the early Archimedes game Zarch (aka Lander). It's extra-unplayable because (on top of it running far too fast) you have to start hitting RETURN within the first second or you'll crash into terrain.
by joachim
Sun Dec 31, 2017 8:20 am
Forum: hardware
Topic: Random pixels on BBC Model B
Replies: 60
Views: 1800

Re: Random pixels on BBC Model B

EDIT 2/ More weird (until understood) symptoms; 1. In Mode 1 and 5, the red triangle shows massive 'pixelation' as per screenshot above. 2. In mode 2 red is OK but now only YEllow shows the pixels. 3. Mode 4 is OK. This actually makes a glimmer of sense. Because for red in MODE 1 or MODE 5, the bit...
by joachim
Fri Dec 22, 2017 3:11 am
Forum: bbcmicro.co.uk
Topic: Games that don't work in jsbeeb
Replies: 32
Views: 3607

Re: Games that don't work in jsbeeb

A tiny failure: the "Play" link in Ghouls of Azzod, http://bbcmicro.co.uk/game.php?id=599 , doesn't result in a functional game, just a black screen in jsbeeb. Incomprehensibly, the game loads fine if you press SHIFT-BREAK from this screen, or if you BREAK and *EXEC !BOOT. It's just the autoboot st...
by joachim
Fri Dec 22, 2017 12:25 am
Forum: archive submissions
Topic: SLID
Replies: 8
Views: 1026

Re: SLID

Any chance of the BBC version as a .ssd image being posted please? regards, Mick. Try this SSD which I have built with BeebAsm and tested with jsbeeb. It includes the fix I posted upthread, but be aware that the fix is in the !BOOT file not in the main program, so if you try to CHAIN "SLID" directl...
by joachim
Wed Dec 20, 2017 1:58 pm
Forum: archive submissions
Topic: SLID
Replies: 8
Views: 1026

Re: SLID

… and besides I thought there was an issue with recognizing user-defined characters because some of them are aliased to each other in *FX 20,0 mode … That's the classic mistake people made of defining CHR$128-159 and then printing CHR$224-255 (or the other way around) and wondering why what was on ...
by joachim
Wed Dec 20, 2017 1:27 am
Forum: archive submissions
Topic: SLID
Replies: 8
Views: 1026

Re: SLID

In fact, I think what I posted must be a modified version that only works on the Arc (or at least on Master upwards), because it expects OSBYTE &87 to return values in the range 224–255. On OS 1.0–1.2 the OSBYTE returns values 128–159: to make the program work with that, remove the REM from line 620...
by joachim
Sun Dec 17, 2017 11:15 pm
Forum: archive submissions
Topic: SLID
Replies: 8
Views: 1026

SLID

I dug up a snake game that we used to have on the school Econet. It was written for the BBC but runs fine on an Arc (apart from the sound, of course). It's rather challenging as the snake is 8-directional and therefore has a nontrivial turning circle. I am told it was written by F. R. C. Dunn. Instr...
by joachim
Sat Nov 25, 2017 11:39 pm
Forum: bbcmicro.co.uk
Topic: secondary genre / games that are clones or knockoffs
Replies: 5
Views: 531

Re: secondary genre / games that are clones or knockoffs

Yes, Kenton talks about that in this thread: viewtopic.php?t=2133. He also mentions that he wrote Ghosts, a clone of Ghouls that was published in A&B, different from the Micro User knockoff that I mentioned upthread.
by joachim
Wed Nov 22, 2017 4:57 pm
Forum: bbcmicro.co.uk
Topic: secondary genre / games that are clones or knockoffs
Replies: 5
Views: 531

Re: secondary genre / games that are clones or knockoffs

Timebomb (http://bbcmicro.co.uk/game.php?id=1079) and Danger UXB (and its two alt versions) and Minefield (http://bbcmicro.co.uk/game.php?id=1073) should be merged into the secondary genre "Bomber Man". (Two of them are currently incorrectly classified as "Mine Sweeper".) I don't have an opinion on ...
by joachim
Wed Nov 22, 2017 4:55 am
Forum: bbcmicro.co.uk
Topic: secondary genre / games that are clones or knockoffs
Replies: 5
Views: 531

secondary genre / games that are clones or knockoffs

I had been thinking it would be convenient to have a database of which games (typically magazine or PD games) are direct imitations of specific commercial releases (not just specific genres). For example Ripton is an imitation of Repton. Then I realised this information is pretty much what's in the ...
by joachim
Tue Nov 14, 2017 9:27 pm
Forum: bbcmicro.co.uk
Topic: Compatability - mulling over new feature
Replies: 6
Views: 669

Re: Compatability - mulling over new feature

What will you do if e.g. the original release was Master-incompatible but Mick's disc is Master-compatible? Or some other such combination.
by joachim
Mon Nov 13, 2017 7:48 pm
Forum: software: other
Topic: Tree of Knowledge loading programs
Replies: 7
Views: 717

Re: Tree of Knowledge loading programs

What that does is copy a kilobyte (&400 bytes) from immediately above the program into screen memory. Why did they do it that way? Surely they could have stored the Acornsoft logo just once (&100 bytes) then manually added the colours and the filing system dialogue window, thus making the loader 2–...
by joachim
Sat Nov 11, 2017 8:04 pm
Forum: software: classic games
Topic: Repton Infinity High Score Anagrams
Replies: 22
Views: 3519

Re: Repton Infinity High Score Anagrams

Ok … I think the middle lines should be:

Code: Select all

THREE NATO PINS  = EARN THE POINTS
HIRO CHASE FROG  = FOR A HIGH SCORE
by joachim
Thu Nov 09, 2017 3:59 am
Forum: software: classic games
Topic: Repton Infinity High Score Anagrams
Replies: 22
Views: 3519

Re: Repton Infinity High Score Anagrams

Yet even more still again! (to quote a famous forum member). This is from Tactic by Andrew Pepperell (Superior 1991). From the ones I've solved, these are definitely anagrams but not of names of people or things: SLICE OUT TRACK! = BIKE MOTHS CAME = STROCTLOW FALCON = THREE NATO PINS = HIRO CHASE FR...
by joachim
Thu Nov 09, 2017 1:08 am
Forum: bbcmicro.co.uk
Topic: Electron User games missing
Replies: 5
Views: 515

Electron User games missing

I noticed that the website now has a nice "About" page which includes an appeal to suggest any games that are missing. So I'd like to point out that Electron User published many nice games that run on the Beeb, and that have slipped through the net so far because on stairwaytohell.com they're only i...
by joachim
Tue Nov 07, 2017 3:44 pm
Forum: archive issues
Topic: Water Works by The Micro User faulty?
Replies: 18
Views: 1292

Re: Water Works by The Micro User faulty?

The only other slight problem I have found and not been able to sort is... The instructions in the Micro User say you can change a piece by holding down the "place" key for a second. This works fine in 1 player mode, but in the other modes player 2s "place" key does not allow him to change his piec...