激光印字机的汉字输出与仿真

Output of Chinese Characters and Emulation in Laser Printer

在激光印字机的汉字输出过程中有两个突出问题需要解决:一是每页信息容量大与控制器内部存贮器空间小的矛盾,二是输出速度高与微机指令执行速度慢的矛盾。 本文围绕着这两个问题,讨论控制器总线的驱动,数据流动路径的选择,软件写入与硬件读出的两个行存贮器结构及控制器的实时仿真等问题。

This paper presents a special circuit for high-speed output of Chinese characters in a laser printer. Emphasis is placed on the description of the structure of the line memory for write-in by software and read-out by hardware. Most of the devices in the circuit are the same as those formed in a conventional microprocessor system. With a special design of the data flow path, such shortcomings as the rather long execution time of the construction and the small capacity of the inter nal memory have been overcome.