Search found 1969 matches

by sweh
Sun Nov 18, 2018 3:06 pm
Forum: adventures
Topic: [Solved] Identification of an old game, map attached
Replies: 7
Views: 65

Re: [Solved] Identification of an old game, map attached

Hmm, displays OK for me on Chromium 70; it warns me "connection to this site is not fully secure", but displays the picture.
by sweh
Sun Nov 18, 2018 1:54 pm
Forum: off-topic
Topic: 3D Printing
Replies: 3
Views: 48

Re: 3D Printing

One thing to be careful of... the contact page mentions "2.27 Romer House Lewisham High Street, London, England, SE13 6EE" as their address. This seems to be a front company for a tonne of other places. The phone number looks like it might be a Hong Kong one. They list support@cpjus.com as their ema...
by sweh
Thu Nov 15, 2018 12:52 am
Forum: general
Topic: How much of this is just rose-tinted specs?
Replies: 16
Views: 335

Re: How much of this is just rose-tinted specs?

I think you're doing us a mis-service. Because of the home computer craze in the 80s I learned to learn the "why" of computers, not the "how to". When I started to use PCs, I kept that "why" and learned how the PC worked, how DOS worked, how the BIOS worked. When I started on Unix... when I started ...
by sweh
Wed Nov 14, 2018 11:52 pm
Forum: general
Topic: How much of this is just rose-tinted specs?
Replies: 16
Views: 335

Re: How much of this is just rose-tinted specs?

For me the fun was always (and still is) not in _using_ the computer, but in learning and building stuff with it. When I analysed Elite tape protection and wrote a program to break it, that was fun. I was learning stuff. When I wrote a program to emulate football score results for my brother, that w...
by sweh
Tue Nov 13, 2018 7:44 pm
Forum: software: other
Topic: First third party DFS ?
Replies: 20
Views: 619

Re: First third party DFS ?

Oddly, I used STL DDFS for over 15 (starting with 2.0J and ending with 2.2M) and never saw that issue. I'd frequently use drives 0 and 2, sometimes at the same time (assembler log to drive 2, source and compiled binary on drive 0 to prevent "Can't Extend" errors) and never saw disk corruption, nor e...
by sweh
Mon Nov 12, 2018 11:23 pm
Forum: software: other
Topic: First third party DFS ?
Replies: 20
Views: 619

Re: First third party DFS ?

STL had their own 8271 DFS ROMs. Indeed, the DFS2.0M ROM (maybe earlier ones as well) would auto-detect the chip and select 8271 or 1770 mode automatically, so the one ROM did both. The Opus and STL boards were very similar; just (I think) the density select was in a different bit. And there was fre...
by sweh
Mon Nov 05, 2018 8:52 pm
Forum: hardware
Topic: The best SD card reader for the Beeb?
Replies: 18
Views: 392

Re: The best SD card reader for the Beeb?

It's been a long time since I tested it, but you could build a Mhz bus expansion that creates a 2nd user port ( https://sweh.spuddy.org/Beeb/2nd_User_Port/ ) and then use the MMFS ROM compiled for that address.

I'm pretty sure it worked... but I could be misremembering!
by sweh
Thu Nov 01, 2018 1:04 am
Forum: software & utilities for the pc, mac or unix
Topic: Wires? Pah.....
Replies: 865
Views: 113060

Re: Wires? Pah.....

There never was an official standard, as far as I can tell. There's a lot of "best practices", and JGH has documented a number of them. But these are guidelines, rather than rules. In my mind, for the Beeb world, if it's not in the UG then it's not a rule... if it's in the AUG then it's a strong rec...
by sweh
Fri Oct 19, 2018 11:43 pm
Forum: software & utilities for the pc, mac or unix
Topic: BBC BASIC desktop shortcut (Linux)
Replies: 36
Views: 486

Re: BBC BASIC desktop shortcut (Linux)

It's just a shame that there's no such thing as a universal binary format that will install on every Linux machine (c.f. Windows PE format) There have been a couple of other formats in the past, but don't most Linux systems use ELF these days? I am not sure it makes a huge amount of difference beca...
by sweh
Fri Oct 19, 2018 11:26 pm
Forum: software & utilities for the pc, mac or unix
Topic: BBC BASIC desktop shortcut (Linux)
Replies: 36
Views: 486

Re: BBC BASIC desktop shortcut (Linux)

However `export foo=bar ; exec baz` will cause the script to be replaced, so there's no extra process hanging around. But there is no need for the shell or the separate script. env should be available as an external command: $ which env /usr/bin/env so therefore it can go in the Exec line of a ,des...
by sweh
Fri Oct 19, 2018 10:32 pm
Forum: software & utilities for the pc, mac or unix
Topic: BBC BASIC desktop shortcut (Linux)
Replies: 36
Views: 486

Re: BBC BASIC desktop shortcut (Linux)

I'm unclear how (or if) using 'export' differs from using 'env' on the same line as the bbcsdl command. Are they equivalent? Note I used the `exec` command in my script. This _replaces_ the current program with the new one, rather than running it as a subprogram. So `env foo=bar baz` will run a chi...
by sweh
Fri Oct 19, 2018 10:27 pm
Forum: software & utilities for the pc, mac or unix
Topic: BBC BASIC desktop shortcut (Linux)
Replies: 36
Views: 486

Re: BBC BASIC desktop shortcut (Linux)

Richard Russell wrote:
Fri Oct 19, 2018 3:47 pm
sweh wrote:
Fri Oct 19, 2018 3:18 pm
It's common, on Unix like systems, to put executables in an area where they can't be overwritten by mistake.
Wow, so it's gradually catching up with Windows then (a few decades late)?!
not-sure-if-trolling.jpg
not-sure-if-trolling.jpg (12.31 KiB) Viewed 125 times
Unix was doing this before Windows even existed.
by sweh
Fri Oct 19, 2018 3:18 pm
Forum: software & utilities for the pc, mac or unix
Topic: BBC BASIC desktop shortcut (Linux)
Replies: 36
Views: 486

Re: BBC BASIC desktop shortcut (Linux)

Not everything is necessarily done as the same user that "installed" the software. It's common, on Unix like systems, to put executables in an area where they can't be overwritten by mistake. It's one reason why malware has less impact; the user you run programs as just doesn't have the permission n...
by sweh
Fri Oct 19, 2018 10:38 am
Forum: software & utilities for the pc, mac or unix
Topic: BBC BASIC desktop shortcut (Linux)
Replies: 36
Views: 486

Re: BBC BASIC desktop shortcut (Linux)

Now you don't need to generate this file at installation time; it can be part of the package. Since (presumably) there's no alternative but to generate the bbcsdl.desktop file at installation time, I don't really understand what the problem is with generating the bbclaunch file as well. Is your con...
by sweh
Fri Oct 19, 2018 2:34 am
Forum: software & utilities for the pc, mac or unix
Topic: BBC BASIC desktop shortcut (Linux)
Replies: 36
Views: 486

Re: BBC BASIC desktop shortcut (Linux)

For the record, here's the script I ended up with: echo "env IBUS_ADDRESS=0 $MYDIR/bbcsdl" > $MYDIR/bbclaunch chmod +x $MYDIR/bbclaunch From a packaging aspect, that is really nasty. You should just have "bbclaunch" work out where it is and so have the file already in the archive. Something like (u...
by sweh
Mon Oct 01, 2018 6:51 pm
Forum: other vintage computer hardware, software and games
Topic: A micro-controller for the retro enthusiast
Replies: 11
Views: 537

Re: A micro-controller for the retro enthusiast

a lot of I/o puns could be useful. Trying to think if an I/O pun... Sorry. Made me smile! You plug your I/O in Your I/O out In Out In Out You blow the dirt right out You clean the dirty contacts And you turn it on That's what it's all about! Oh, the dirty contacts Oh the dirty contacts Oh the dirty...
by sweh
Sun Sep 30, 2018 6:48 pm
Forum: hardware
Topic: 2 (or more) ROMs in the same image
Replies: 9
Views: 381

Re: 2 (or more) ROMs in the same image

The problem is that the ROM will be assembled to be at &8000 and will be looking for data and subroutines based on it. If you have the source code for one of the ROMs and can compile it to be at &A000 then, yes, you can patch the first ROM to jump to your code first, then jump back to the original R...
by sweh
Fri Sep 28, 2018 12:37 am
Forum: hardware
Topic: This is not a language
Replies: 65
Views: 1205

Re: This is not a language

The Master has a battery inside it that keeps configuration settings. If the battery goes flat then configuration is lost. This is pretty common on old machines. So first thing you should do is change the battery (assuming the person you bought it from already hasn't done it). While you're in there ...
by sweh
Fri Sep 28, 2018 12:22 am
Forum: hardware
Topic: New econet setup
Replies: 75
Views: 1619

Re: New econet setup

flaxcottage wrote:
Thu Sep 27, 2018 8:27 pm
MMC card and Econet are incompatible. Both try to use the same workspace. :?
Unless you use the SWR version of MMFS...
by sweh
Mon Sep 24, 2018 5:42 pm
Forum: software: other
Topic: ADE / ADE Plus Help
Replies: 6
Views: 451

Re: ADE / ADE Plus Help

There are ADE Editor and ADE 6500 ROMs available at https://acorn.huininga.nl/pub/roms/System%20Software/

Dunno if they're what you need!
by sweh
Fri Sep 21, 2018 1:33 am
Forum: hardware
Topic: Model B serial speeds
Replies: 13
Views: 537

Re: Model B serial speeds

The tape loader uses CRC because tape loading is notoriously unreliable. If your serial code is more reliable than maybe you can use a simpler check (eg EOR).
by sweh
Tue Sep 18, 2018 6:22 pm
Forum: hardware
Topic: New econet setup
Replies: 75
Views: 1619

Re: New econet setup

FWIW, just as the default value for the file server is 254, the default value for the print server is 235.
by sweh
Mon Sep 17, 2018 5:30 pm
Forum: hardware
Topic: New econet setup
Replies: 75
Views: 1619

Re: New econet setup

The server doesn't use SWRam; it runs on the 2nd processor.
by sweh
Sat Sep 15, 2018 12:56 pm
Forum: emulators
Topic: MAME on Debian looking "blurred"
Replies: 9
Views: 346

Re: MAME on Debian looking "blurred"

Ah...

Code: Select all

-gl_glsl -gl_glsl_filter 0
Seems to help massively.

And setting those options in mame.ini gives me nice clean MrEe :-)
by sweh
Sat Sep 15, 2018 12:48 pm
Forum: emulators
Topic: MAME on Debian looking "blurred"
Replies: 9
Views: 346

Re: MAME on Debian looking "blurred"

Window mode doesn't make any difference.

FWIW, here's an example of how it looks using opengl
opengl.png
vs soft video.
soft.png
by sweh
Fri Sep 14, 2018 1:48 am
Forum: emulators
Topic: MAME on Debian looking "blurred"
Replies: 9
Views: 346

Re: MAME on Debian looking "blurred"

It's hard to know if others are blurred 'cos I didn't play many arcade games when I was a kid, so I don't know if the visuals are right or not :-) Defender, Pacman, Ms-Pacman, Robotron, Gauntlet, Tron, Marble Madness, Galaga all seem OK. Even BBC in any mode except 2 and 5 are OK. $HOME/.mame/mame.i...
by sweh
Fri Sep 14, 2018 12:08 am
Forum: emulators
Topic: MAME on Debian looking "blurred"
Replies: 9
Views: 346

Re: MAME on Debian looking "blurred"

Well, the dependency issue didn't matter. It was mostly a clean build. Took about 1hr20 on my old AMD Phenom(tm) II X4 830 Processor machine. So now I have mame 0.201 (64bit) running. And the results appear identical... except "soft" mode is even slower. Still perfect picture, but slow and choppy au...
by sweh
Thu Sep 13, 2018 10:06 pm
Forum: emulators
Topic: MAME on Debian looking "blurred"
Replies: 9
Views: 346

Re: MAME on Debian looking "blurred"

Hmm. opengl was the default. "bgfx" also was blurry. "soft" was excellent quality... but the CPU load was clearly taxing 'cos it caused audio to stutter.

Maybe I'll see about compiling the latest one... but I'm afraid it'll send me into dev library dependency hell if I'm not careful!
by sweh
Thu Sep 13, 2018 2:32 am
Forum: emulators
Topic: MAME on Debian looking "blurred"
Replies: 9
Views: 346

MAME on Debian looking "blurred"

I have a Debian based desktop with a 1920x1080 monitor. Debian comes with MAME 0.182 as an installable package ("apt-get install mame"). I have the .200 ROM collection (via archive.org). I can run "mame bbcb" and it works. So far, so good. Now I run "mame bbcb -flop1 MrEe.ssd". Press shift+f12... an...
by sweh
Sun Sep 09, 2018 8:40 pm
Forum: emulators
Topic: SSDs in Strange Sizes
Replies: 5
Views: 266

Re: SSDs in Strange Sizes

My perl utils always fills out to 200K truncated disks like this, and (unless told otherwise) assumes standard SSD 80*10. I think it might be useful to know the history behind SSD as a format. Why 80 track by default, for example? Surely if the main use was to store images of discs as distributed, ...