1 start condition, 2 no start or stop condition, 3 stop condition – Intel CONTROLLERS 413808 User Manual
Page 696: Figure 94. start and stop conditions, 94 start and stop conditions, Section 14.2.3.1, “start condition” on, The start condition (bits 1:0 of the icr set to 01, Cbus when the icr transfer byte bit is set. the i, C unit functions under those circumstances, C unit holds the
