Recent Posts

"BEWARE 20,000 VOLTS" – The Joy of SpriteExtend

by David Thomas on

Background

The Acorn operating system RISC OS is built from a kernel and a collection of software components called relocatable modules. Its native bitmap format is the sprite.

SpriteExtend

RISC OS’s most fundamental sprite drawing routines live alongside the other VDU handling within the OS kernel. However, that’s not enough to support all of the defined sprite operations. A support module called SpriteExtend enters the fray: it hooks into the OS and steps in when required to implement the extended OS_SpriteOp operations.

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PrivateEye 3.10 has improved JPEG-fu

by David Thomas on

PrivateEye 3.10 is now available.

Slightly out-of-date snap

PrivateEye is a viewer for Sprites, DrawFiles, JPEGs, ArtWorks, GIFs and PNGs. It also has editing features including bitmap effects and rotation.

Version 3.10 is an update which enhances its handling of JPEGs:

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Dave Done Doodling

by David Thomas on

image

I’ve updated the site a few times since my last front-page blog post. So what’s happened lately?

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An Anachronistic Hard Disc

by David Thomas on

Acorn branded hard disc

Read about it here.

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A Virtual Risc PC

by David Thomas on

I’ve been learning how to model 3D objects in Blender by recreating the Acorn Risc PC case.

Acorn Risc PC model

Read about it here.

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