Exam 17: Expert Ms-Dos Programming Assessment

The CLASS type in a segment definition makes it possible to combine two segments having different names.

The following is an example of a valid segment override: mov eax,ds:var1

The Speaker Demo Program uses the IN instruction to turn the speaker on.

Memory-mapped video is set up so that when characters are placed in memory at predetermined addresses,the characters appear on the video display only when a special control value is output to a hardware port.

The following are all permissible segment ALIGN types: BYTE,WORD,DWORD,REAL4.

When an interrupt executes,an address in the Exception Process Table is used to locate the interrrupt handler.

Port-based I/O uses the IN and OUT instructions to read and write data to specific numbered locations.

An EXE program can have overlapping code,data,and stack segments.

In large model programs,all code segments have the same name.

The segment combine type tells the linker how to combine segments having the same name.

All COM programs use the small memory model.

The ASSUME directive permits the assembler to calculate the offsets of labels and variables.

IA-32 systems offer two types of hardware input-output: memory-mapped,and port-based.

Only one code segment may be created in a single program module.

When a key is pressed on the keyboard,the Intel 8259 programmable interrupt controller signals the CPU to suspend execution of the current program.