1. System/360

    RS-232 Isn't the TXD on Mark until the start bit?

    My first post, please pardon me if this is not in the right group. I have a USB-serial adapter using the FTDI FT232R chip. Specifically it is this item I bought on taobao.com. It is connected to a Windows 10 laptop. I connected the TXD pin to a simple oscilloscope. When I send some data from...