Note pad computer system with handwritten entries - mixes video graphics array output with graphic superimposition unit simultaneous display of LCD panel

摘要

The notepad computer has a data bus (10) that supports a videographics array, VGA, (12) and a graphics superimposition circuit (19) that are coupled to mixing logic (16) providing output to an LCD display (18). The hardware is controlled by programmes in the form of user software (20) and operating system software (21). The user software controls the VGA and the application software has a DOS system in ROM memory (22), together with an input/output system (24). The system may operate in text or graphics mode. The graphics superimposition unit (14) allows handwritten information to be received and combined on the display. ADVANTAGE - Allows test and graphics mode.