User:Purple-bobby

I've had a hobby of electronics since about 1976, and of microcomputers since about 1978. I became interested in computer graphics at polytechnic in around 1982. In 1983, I got employment programming computer graphics in Zilog Z80 assembler on a Gemini 80-Bus system with Pluto graphics card. Soon afterwards, I became interested in user interface design. I've used and written programs for the following systems: Unix, CP/M, ZX Spectrum, PC-DOS or MS-DOS, PRIMOS, Windows, NEXTSTEP, and Linux. I've used the following programming languages and scripting languages: BASIC, Pascal, FORTRAN, Z80 assembler, 8086 assembler, C, COBOL, Objective-C, C++, SQL, JavaScript, and PHP.