System/38 microcode that defines logical operations on data. The microcode is primarily sequential in execution and supports the System/38 machine instruction set.; 在IBM System/38中使用的一種微碼，用來定義數(shù)據(jù)邏輯操作。垂直微碼按順序執(zhí)行，并支 持機(jī)器指令集。