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Article archives

Adventures in Optimisation - Walls

Posted by Jeffrey Lee on 08:00, 25/5/2020 | ,
 
Continuing in my quest to optimise my RISC OS port of NBlood, I've recently been taking a look at the rendering code. Specifically, the top functions in my profiler's output: the vertical line drawing routines, which are used to draw walls and sprite-based entities.
 
 
Continue reading "Adventures in Optimisation - Walls" | 3 comments in the forums

Adventures in Optimisation - Audio mixing

Posted by Jeffrey Lee on 08:00, 5/7/2019 | ,
 
Welcome to the first in a (very) infrequent series of articles about optimisation. In this article I'll be looking at audio mixing in C/C++ using GCC 4.7.4, running benchmarks of various routines and optimisations across multiple machines in order to work out what works well and what doesn't.
 
 
Continue reading "Adventures in Optimisation - Audio mixing" | 3 comments in the forums

David Pilling Treasure Trove

Posted by Mark Stephens on 07:02, 18/1/2019 | ,
 
If you are looking to learn about software, there is a treasure trove of source code and resources available on the Internet.
 
One of the more interesting resources is from David Pilling. He is something of a RISC OS legend (being behind OvationPro and many critical tools for RISC OS). His website lists his software and also includes several free utilities.
 
There is also an interesting section for 'retired' software here. Rather than just let the packages disappear, the source code is now available for all the ArcFax, Panorama, SparkFS and many other former commercial applications. Enjoy digging....
 
[Updated 18 January] Thanks to Sprow for pointing out SparkFS does not include source code
 
David Pilling website
 
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PackMan in practice, part 2

Posted by Jeffrey Lee on 09:00, 16/11/2018 | , , ,
 
As mentioned at the end of part one, this article about creating PackMan packages is going to look at what's necessary to generate distribution index files, ROOL pointer files, and how these tasks can be automated. Towards the end I'll also be taking a look at some options for automating the uploading of the files to your website.
 
 
Continue reading "PackMan in practice, part 2" | 1 comment in the forums

GPS becomes Data Logger

Posted by Mark Stephens on 06:21, 9/11/2018 |
 
At the recent London Show Chris Hall was showing his new Data Logger. Here he gives some info into the new hardware
 
Version 2.40 of my SatNav software and the compact hardware unit with just an OLED display meant I could stop trying to fix things that were still unfinished. I had full battery management, conditional data logging, robust and error-tolerant data downloading on demand and power management that avoided any SD card corruption.

Where next?

 
There were things still unfinished: I wanted the unit to be able to use WiFi to transmit data instead of making do with manual downloads to a USB pen drive; I would have liked to remove the code which drives a liquid ink display (Papirus) into a more general purpose module, where it should be, but had never tried writing one. RiscBASIC could compile an application to a module but only at 26 bit. Both these aspirations were therefore not immediate.


 
 
Continue reading "GPS becomes Data Logger" | 2 comments in the forums

PackMan in practice

Posted by Jeffrey Lee on 08:00, 14/9/2018 | , , ,
 
For this first article looking at how to create PackMan/RiscPkg packages, I've decided to use my SunEd program as a guinea pig. Being a simple C application with no dependencies on other packages, it'll be one of the most straightforward things on my site to get working, and one of the easiest for other people to understand.
 
Read on to discover how to turn simple apps like SunEd into RiscPkg packages, and more importantly, how to automate the process.
 
 
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The state of PackMan in 2018

Posted by Jeffrey Lee on 20:30, 20/8/2018 | , , , , ,
 
In a previous article we've looked at what software is available via !PackMan. But what if you're a developer who wants to get your software listed - where do you start?
 
 
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Getting started with Bash on RISC OS

Posted by Mark Stephens on 07:53, 15/6/2018 |
 
There are lots of hidden treasures to try for free in PackMan (see our review from 2017). In this article we are going to go into more depth with Bash. Bash is a freely available on many systems (I use it all the time at work on Macs and Linux systems). It also provides the basis for running many other tools and automating things by writing short Bash scripts.
 

 
Once installed, you can start writing Bash directly in a single-tasking window by running the Bash App. But the best way to run it is from a terminal window. Just type the command Bash and you will be using bash.
 
Type in exit to return to the standard RISC OS command line.
 
Type in help to give you a list of commands at any time.
 

 
If you want to learn more about Bash, we recommend you start with the Wikipedia entry.
 
What is your favourite tool on !PackMan?
 
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Power Switching a RaspberryPi

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DDE tools update released

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55 BBC Micro Books on CD

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BBC BASIC Reference Manual updated

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DDE reaches release 28 and above

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Newsround

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