本文介绍了一种以gal 20 V 8为核心的串行口扩展卡的设计方案，详细说明了其工作原理，并给出了GAL 20v8的内部逻辑和程序清单。

This article introduces a design project about a serial extended card with GAL20V8 in nucleus, explains the work principle in detail, and gives the inside logic and program listing of GAL20V8.

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如果你想要更多，MITS还为你提供一些小附件：一张视频卡，一张连接终端的序列卡，一个64kb的RAM扩展卡和一张8英寸的软盘。

If you wanted to soup the thing up, MITS offered a few peripherals: a video card, a serial card for connecting to a terminal, a 64-kb RAM-expansion card and an 8-inch floppy drive.

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