MICRO COMPUTER ADAPTED FOR USE WITH CRT DISPLAY

摘要

. Microcomputer apparatus includes a Z80A-CPU central processing unit operable with 8-bit data and 15-bit address information; an upper 8-bit address bus; a lower 8-bit address bus; an 8-bit data bus; a ROM for storing a monitor program and/or a BASIC interpreter and connected to the central processing unit through the address buses and the data bus; a first RAM for a work area connected to the central processing unit through the address buses and the data bus; a second separate video buffer RAM for video display connected to the central processing unit through the address buses and the data bus and adapted to be accessed by I/O instructions from the central processing unit; and a CRT display for displaying a video picture in response to video data stored in the video RAM.