Using the configuration established in Prob. 11-16, obtain a flowchart (similar to Fig. 11-11) for the CPU program to output data.

Prob. 11-16

Show a block diagram similar to Fig. 11-10 for the data transfer from a CPU to an interface and then to an I/O device. Determine a procedure for setting and clearing the flag bit.

Fig. 11-10

Fig. 11-11

CPU Data bus Address bus 1/0 read 1/0 write Interface Data register Status register F = Flag bit F 1/0 bus Data valid Data accepted I/O device