OSG202Xuất hiện trong 2 đề thi
Which of the following statement is not true about separating I/O and memory space?
Các lựa chọn
ADevice drivers must be written using assembly language
BPrograms must use 2 instructions to test whether the device is ready
CThere is special protection mechanism to keep user processes from performing I/O
DCaching a device control register would be disastrous