Here’s an interesting project I came across last week through a contact on LinkedIn – a C Compiler for the Z80 processor. The Z88 DK project was originally conceived for the Cambridge Z88, but now supports a variety of Z80 based platforms including the ZX Spectrum. There are the generic libraries you’d expect from a C compiler including stlib, maths, malloc and string, as well as support for sprites, sound, interrupts and 3D rotation. In …
This application is a C++ application that I wrote for my employees as part of our interactive shopping centre kiosk product. The bulk of the kiosk application is written in Adobe Flash with some backend code (in Perl / Bash and C++) for additional functionality. This module provides the data for an on-screen route planner so that the shoppers can find a route to a particular shop from the kiosk. A bit like a TomTom …
Short post today; updated the libraries and demo code to include the following: math.asm – Added sqrt and multiply routines (thanks to the Internet). vector.asm – Added circle, optimised horizontal line & wireframe triangle routines. screen_buffer.asm – Added fast stack pointer clear screen routine. The source for demo_vector.asm has also been updated to allow the user to select which point on the triangle to move with the cursor by pressing the space bar, and drawing …
I’m currently working on a vector graphics library; this will eventually include fast implementations of line, circle and triangle rendering. There will be options to render on the standard Spectrum screen (with it’s horrid layout) and to a more sensibly laid out offscreen bitmap. I’m also going to add filled circle and triangle with optional texture shading (an 8×8 graphic). I’ve just reworked a version of Bresenhams Incremental Line Algorithm in Z80, working in one …
I wrote a few months back about resources for kids who want to get into programming and mentioned a resource called YOUSRC. I tweet the man behind the curtain, Paul Clarke (@YOUSRC) on a fairly regular basis and after a conversation about Bresenham’s Incremental Line Algorithm (a fast way to plot any line without using floating point arithmetic) in response to a game he’d written on the site (Missile Command), I thought I’d have a …
