Serial Data Format - IBM RT Series Hardware Reference Manual

Serial Data Format
The data format is as follows:
Transmit
Start
Oata
00
01 02 03 04 05 06 07
Parity
Stop
Marking
Bit
Bit Bit
Data bit 0 is the first bit to be transmitted or received. The adapter automatically inserts the start
bit, the correct parity bit (if programmed to do so), and the stop bit (1, 1-1/2, or 2 depending on
the command in the line control register).
5080 Peripheral Adapter 9