piekarski-slides-lca.. - Tinmith Augmented Reality Project

Parallel port• 25-pin D shell connector• 8 data lines capable of +5V with low current• Old ports are only single direction• Other flow control lines also capable of data transfer• Write directly to address using ioperm() and outb()• LED CPU Meter provided in the example archive• CPU must bang out each byte manually• Interrupt for each incoming byte or intensive polling• Linux isn’t really designed for any of these• DOS is actually ideal for using these54 Wayne Piekarski Wearable Computer Lab CIS @ UniSA http://www.tinmith.net/lca2005lca 2005