Search found 566 matches

by Diminished
Wed Feb 28, 2018 7:10 am
Forum: wanted
Topic: Would like to borrow: Hydra controller card
Replies: 29
Views: 4621

Re: Would like to borrow: Hydra controller card

I get the impression this would have been a rather loose interpretation of the word "borrow".

C'est magnifique, Hookey Street...
by Diminished
Wed Feb 21, 2018 4:11 pm
Forum: off-topic
Topic: Thermionic Valves
Replies: 81
Views: 8270

Re: Thermionic Valves

Edit: see also the wonderful video Hand Made Vacuum Tubes by Claude Paillard Very cool. With the Doomsday Clock currently set to 30 seconds before midnight, this knowledge will surely come in handy when the EMP strikes. Bring on the steampunk future! :twisted: Matched sets might be a little tricky,...
by Diminished
Sun Feb 18, 2018 9:24 pm
Forum: off-topic
Topic: Thermionic Valves
Replies: 81
Views: 8270

Re: Thermionic Valves

I wonder what other markets still exist. I read a few years ago now that high-powered RF applications, for example TV transmitters, tended to be valve based and that was long after just about everything else was transistorised or even IC-based. I don't know if that is still the case. I assume domes...
by Diminished
Sun Feb 18, 2018 8:12 pm
Forum: off-topic
Topic: Why did CISC prevail?
Replies: 21
Views: 2123

Re: Why did CISC prevail?

Interesting stuff in this thread. +1 Thumb dislike here too. There is a joke in here somewhere about "sucking your Thumb" but I'll pass, although the 32-bit "Thumb-2" Cortex edition of it is a lot better. I liked the conditional instructions in the older 32-bit ARM architectures. A few years ago I w...
by Diminished
Sun Feb 18, 2018 7:06 pm
Forum: off-topic
Topic: Thermionic Valves
Replies: 81
Views: 8270

Re: Thermionic Valves

I vaguely remember Mullard valves. New-old-stock Mullards are still sought after by guitarists. I think the reason I like these little baubles so much is because I was exactly the right age to be captivated by them. There is a documented phenomenon of children being enraptured more by slightly antiq...
by Diminished
Sun Feb 18, 2018 5:21 pm
Forum: off-topic
Topic: Thermionic Valves
Replies: 81
Views: 8270

Re: Thermionic Valves

For emotional and historic reasons with which I won't bore you, I have a real fondness for these. Shortly before Christmas I re-valved my guitar amplifier as I had a gig to play. One of the original valves had gone microphonic (a big problem at stage volumes) so I bought gorgeous new sets of ECC83s ...
by Diminished
Mon Jan 22, 2018 10:23 pm
Forum: 8-bit acorn software: classic games
Topic: Citadel Item Randomiser 0.4 (updated)
Replies: 44
Views: 9739

Citadel Item Randomiser 0.4

0.4 is mostly a rewrite. I probably should have tested it a little more but I have other things to do ... - built-in PRNG means seeds now compatible between Model B and Master - pyramid sarcophagus and its corresponding crystal are both now randomised - solver now calculates maximum points for each ...
by Diminished
Tue Jan 16, 2018 2:41 pm
Forum: 8-bit acorn software: classic games
Topic: Citadel Item Randomiser 0.4 (updated)
Replies: 44
Views: 9739

Re: Citadel Item Randomiser 0.1 (and now 0.2)

Here's the 2 file (CITADEL and CITAX), no speech, no title screen, PIAS1 re-release BBC Master compatible disk version, which I guess would've been the last official release of the game :?: (CHAIN"CITADEL" to load!) Thanks for these, Bill ... I quite fancy this one, as you don't have to sit through...
by Diminished
Fri Jan 12, 2018 5:10 pm
Forum: 8-bit acorn software: classic games
Topic: Citadel Item Randomiser 0.4 (updated)
Replies: 44
Views: 9739

Re: Citadel Item Randomiser 0.1 (and now 0.2)

Worth a try, Rich ... I might as well post the current state of my CITAM disassembly ... It's unfinished and I know for a fact it contains plenty of inconsistencies and mistakes, and much of the variable and subroutine naming could be improved. I don't think WFDIS supports comments longer than a sin...
by Diminished
Fri Jan 12, 2018 2:25 pm
Forum: 8-bit acorn software: classic games
Topic: Citadel Item Randomiser 0.4 (updated)
Replies: 44
Views: 9739

Re: Citadel Item Randomiser 0.1 (and now 0.2)

Incidentally, that weird code in the patch which is checking for certain magic values and converting them to other magic values: that's translating a 'stripy' colour value into the best flat colour that can be selected using a legal GCOL call. That's why stuff like the Witch's House roof looks flat...
by Diminished
Fri Jan 12, 2018 2:19 pm
Forum: 8-bit acorn software: classic games
Topic: Citadel Item Randomiser 0.4 (updated)
Replies: 44
Views: 9739

Re: Citadel Item Randomiser 0.1 (and now 0.2)

Also, why is the patch code full of NOPs? Maybe I've been awake too long, but I keep giggling at this sentence. It seems like all I've done for two days is stare at deranged code that's inexplicably full of NOPs. I think I need to gawk at CITAM for a bit to regain my sanity. There isn't a single NO...
by Diminished
Fri Jan 12, 2018 1:31 pm
Forum: 8-bit acorn software: classic games
Topic: Citadel Item Randomiser 0.4 (updated)
Replies: 44
Views: 9739

Re: Citadel Item Randomiser 0.1 (and now 0.2)

Well, this was more fun than working on the randomiser. That routine at &5720 looks like the bit that patches the game for Master compatibility - it puts a small amount of code at &B001 and then patches the main code to jump there in certain situations. If anyone has the time to look at what it's do...
by Diminished
Fri Jan 12, 2018 11:06 am
Forum: 8-bit acorn software: classic games
Topic: Citadel Item Randomiser 0.4 (updated)
Replies: 44
Views: 9739

Re: Citadel Item Randomiser 0.1 (and now 0.2)

Well, none of the STH images are originals, because the SSD format can't support protected disks. So all of those images are necessarily versions which have had their protection stripped and put onto a clean DFS format disk image. Ah, I didn't realise this. The original disk isn't formatted in any ...
by Diminished
Fri Jan 12, 2018 9:28 am
Forum: 8-bit acorn software: classic games
Topic: Citadel Item Randomiser 0.4 (updated)
Replies: 44
Views: 9739

Re: Citadel Item Randomiser 0.1 (and now 0.2)

Thanks, Rich! I'm slightly disappointed that the STH version wasn't the original, since I'm pretty sure that's the one I spent two months disassembling! I'm baffled as to why CITAM would be reloaded at &8000. I'm not an expert on the machine's internals, but ... isn't that all ROM and I/O up there? ...
by Diminished
Fri Jan 12, 2018 6:10 am
Forum: 8-bit acorn software: classic games
Topic: Citadel Item Randomiser 0.4 (updated)
Replies: 44
Views: 9739

Re: Citadel Item Randomiser 0.1 (and now 0.2)

Aha, that sounds likely. It might also explain why something seems to modify it. Which is actually where this gets interesting for the archivists, because I'm using the version from STH ( this one right here ). So if this is the hallmark of removed copy protection, then there seem to be two possibil...
by Diminished
Fri Jan 12, 2018 1:24 am
Forum: 8-bit acorn software: classic games
Topic: Citadel Item Randomiser 0.4 (updated)
Replies: 44
Views: 9739

Re: Citadel Item Randomiser 0.1 (and now 0.2)

So ... could anyone with more experience than I have hazard a guess as to why this huge NOP sled exists in CITAL, after the call to OSFILE? ... 5476: ldx #$4d 5478: ldy #$56 547a: lda #$ff 547c: jsr $ffdd 547f: nop 5480: nop 5481: nop 5482: nop 5483: nop 5484: nop 5485: nop 5486: nop 5487: nop 5488:...
by Diminished
Fri Jan 05, 2018 7:03 pm
Forum: other vintage hardware, software and languages
Topic: 34C3: Ultimate Apollo Guidance Computer Talk
Replies: 3
Views: 759

34C3: Ultimate Apollo Guidance Computer Talk

This might interest a few:

https://media.ccc.de/v/34c3-9064-the_ul ... puter_talk

If you can keep up with the breakneck speed of this presentation, then you're doing better than I did!
by Diminished
Fri Jan 05, 2018 4:13 pm
Forum: 8-bit acorn software: classic games
Topic: Citadel Item Randomiser 0.4 (updated)
Replies: 44
Views: 9739

Re: Citadel Item Randomiser 0.1

Can you not use DIM to reserve the required number of bytes in memory (rather than to dimension an array)? Well, shucks. I had no idea you could do this. I've just tested your 0.2 version of this in-browser, and beat a seed with 99 points (and 265 energy remaining. 8)) So this looks like it works j...
by Diminished
Thu Jan 04, 2018 11:58 pm
Forum: 8-bit acorn software: classic games
Topic: Citadel Item Randomiser 0.4 (updated)
Replies: 44
Views: 9739

Re: Citadel Item Randomiser 0.1

I don't know Citadel very well at all, but I was intrigued by this Randomiser, so I hope you don't mind that I had a go at doing a version that doesn't need the disc to be writable: Play online: http://bbcmicro.co.uk/jsbeeb/play.php?autoboot&disc=https://dl.dropboxusercontent.com/s/2lwu3u308t6kjef/...
by Diminished
Thu Jan 04, 2018 4:06 pm
Forum: 8-bit acorn emulators
Topic: Easy way to get a BASIC program from a text file into an emulator
Replies: 15
Views: 2046

Re: Easy way to get a BASIC program from a text file into an emulator

What would you like it to do? :) "writable, but thrown-away discs" support ^^ Exactly this. Essentially using the uploaded disc as temporary storage for the duration of the session. There is no requirement to keep the disc's contents around once a game has been completed. As I mentioned in my relea...
by Diminished
Thu Jan 04, 2018 1:42 pm
Forum: 8-bit acorn emulators
Topic: Easy way to get a BASIC program from a text file into an emulator
Replies: 15
Views: 2046

Re: Easy way to get a BASIC program from a text file into an emulator

For an occasional one-off I don't think this can complete with the convenience of BeebEm's clipboard paste but was much easier to implement portably. This does sound like the right solution. I've seen the thread on the improvements to B-Em since 2.2 and it looks like lots of excellent new things ha...
by Diminished
Thu Jan 04, 2018 3:54 am
Forum: 8-bit acorn software: classic games
Topic: Citadel Item Randomiser 0.4 (updated)
Replies: 44
Views: 9739

Citadel Item Randomiser 0.4 (updated)

The latest version of this is the much-improved 0.4, which you can get lower down this thread . (The original first post in this thread follows). CITADEL ITEM RANDOMISER Going Rogue INTRODUCTION Item randomiser utilities are well known to aficionados of non-linear console games, being particularly c...
by Diminished
Wed Jan 03, 2018 12:07 am
Forum: 8-bit acorn emulators
Topic: Easy way to get a BASIC program from a text file into an emulator
Replies: 15
Views: 2046

Re: Easy way to get a BASIC program from a text file into an emulator

Coding like it's 1984 now guys, thanks a lot! Didn't even have to look up how to redefine a function key to do the *EXEC part. Amazing how that knowledge is still in my brain, somehow.
by Diminished
Tue Jan 02, 2018 10:35 pm
Forum: 8-bit acorn emulators
Topic: Easy way to get a BASIC program from a text file into an emulator
Replies: 15
Views: 2046

Easy way to get a BASIC program from a text file into an emulator

Is there a simple way to do this? It seems astonishingly difficult. I'm working on a BASIC program in a text file under Linux, and I would like a way to be able to just splat it into an emulator, preferably B-em 2.2, as that's what I'm using. I've tried CTRL-Ving it into BeebEm, B-em, and jsbeeb. No...
by Diminished
Mon Jan 01, 2018 5:02 pm
Forum: 8-bit acorn software: classic games
Topic: Unused Citadel bits
Replies: 106
Views: 15069

Re: Unused Citadel bits

Sorry, I've been peddling misinformation again. *consults notes* Tile 114 is the one that I said might be an unused water animation, or the splash graphics. Tile 115 is the ceiling spikes, which my script partially renders. Tile 116 is the ground spikes, which my script doesn't render for some reaso...
by Diminished
Sun Dec 31, 2017 1:41 pm
Forum: 8-bit acorn software: classic games
Topic: Unused Citadel bits
Replies: 106
Views: 15069

Re: Unused Citadel bits

Sorry, that's a bug. The torch is actually the final tile, 117, which isn't in the ZIP file. Tile 116 (ceiling spikes) has a messed-up final layer, so what I think is happening is that it's trying to read the data for tile 117 as part of tile 116. (EDIT: nope, see five posts down.) Something similar...
by Diminished
Sun Dec 31, 2017 10:09 am
Forum: 8-bit acorn software: classic games
Topic: Unused Citadel bits
Replies: 106
Views: 15069

Re: Unused Citadel bits

For comparison, here's the set from citadel-early, which exhibits some differences as I mentioned.
citadel-bbc-early-tiles.zip
(50.28 KiB) Downloaded 56 times
by Diminished
Sun Dec 31, 2017 10:01 am
Forum: 8-bit acorn software: classic games
Topic: Unused Citadel bits
Replies: 106
Views: 15069

Re: Unused Citadel bits

Better start over on my wall tile rips. Woke up, read this, stuffed PNG export into my script. Here's the entire tileset according to my reimplementation. I wasn't going to publish this, because a) technically it's copyrighted and b) as I mentioned, a minute fraction of the layers don't render corr...

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