Machine-translated by Google. Questions are authored in English.
Top

Discussion

A base register table

  • A.allows the programmer to write base registers and displacements explicitly in the source program.
  • B.is used to remember which of the general-purpose registers are currently available as base registers, and what base addresses they contain.
  • C.allows multiple programs to reside in separate areas of core at the same time.
  • D.is a term that refers to the control programs of an operating system.

Answer: B

Correct answer: is used to remember which of the general-purpose registers are currently available as base registers

The System/370 forms every address from a base register plus a displacement, so the assembler must know which registers currently hold base addresses and what they point at. The base register table records exactly that, and the assembler consults it to choose a base and compute the displacement for each symbolic reference.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.