Abstract
EMDISP provides general-purpose assembly language routines that can be called from higher level languages to produce specific application programs for experiments involving visual displays, manual responses, and analogue sampling (e.g., eye movement recording). The display system assumes the use of fast-phosphor oscilloscopes driven by 12-bit digital-to-analogue converters (DACs) to produce point-by-point displays. Within these limitations, EMDISP offers a flexible and efficient method of generating displays, in which elements of a complex display are defined as separate “pictures” and are controlled independently. High-level control of digital and analogue sampling are provided, enabling interactions between the contents of the display and analogue and digital inputs.
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