ebx

GAS: movb (% ebx, % esi, 1), % al.

GAS： movb (% ebx，% esi, 1)，% al。

This sets EBX to either zero or the difference of the two values.

这就将EBX或者设置为0，或者将其设置为两个值的差。

EBX is decremented and ANDed with the difference between the two constant values.

EBX 的值被减少，并且与两个常量值的差执行与（ AND ）操作。

By adding the smaller of the two constant values, the correct value is written to EBX.

通过加上两个常量值中较小的一个，这样就把正确的值写到了EBX中。

A theory pattern of e-book service is established for the digital library based on DRM technologies of e-book exchange (EBX) system.

本文依据电子书交换系统(ebx)的DRM技术，构建了数字图书馆电子书服务的理论模式。