cshort@nmsu.edu (Spmg*d, Lord of Potted Meat Product) (02/08/91)
hi i an amiga fanatic with a lasers as a hobby. stumbling around amazing computing back issue index, i find: Vol 3 No 2, Feb 88 Laser Light Shows With the Amiga, by Patrick Murphy DOES ANYBODY HAVE THIS ARTICLE please please, post or send it to me or whatever thanks chris cshort@nmsu.edu computing research lab new mexico state university las cruces, nm
m0154@tnc.UUCP (GUY GARNETT) (02/08/91)
In article <CSHORT.91Feb7210310@haywire.nmsu.edu> cshort@nmsu.edu (Spmg*d, Lord of Potted Meat Product) writes: > >hi > >i an amiga fanatic with a lasers as a hobby. stumbling around amazing computing >back issue index, i find: Vol 3 No 2, Feb 88 > >Laser Light Shows With the Amiga, by Patrick Murphy > >DOES ANYBODY HAVE THIS ARTICLE > >please please, post or send it to me or whatever > >thanks > >chris > >cshort@nmsu.edu >computing research lab >new mexico state university >las cruces, nm Yep, and I have also met the man. Patrick was one of the early members of the DC area Amiga user group; I have seen his setup and software, and can tell you a little about it. At one time he was selling the software (maybe with some hardware) to other interested parties. Patrick used an Amiga 1000 with the audio output filter hack; he pulled the unfiltered audio out to two extra jacks on the back of the machine. This he ran through his amps and into the X and Y inputs of a laser galvo. Waveforms output to the L and R sound systems became the X and Y displacements for the galvo. Patrick's original software was written in AmigaBASIC; it allowed you to draw a figure on the screen, built it up as a waveform, and sent it off to the audio hardware. The software got more and more sophisticated as Patrick added more neat features (multiple buffers, laser writing, and so on). If you have an A500, 2000, or 3000, the audio filters are switchable. The signal at the audio out jacks are line level, ready to go into your galvo. You can then play with software to let you control the laser. It can be done with AmigaBasic, or a simple C program will let you control the audio hardware (check out the Amiga Hardware Reference Manual from Addison-Wesley). I will check around and see if I can find Patrick's address, and any more information. Wildstar