Question

Jason has been previously working with IBM 370, his friend works with

VAX machine mostly. Jason couldn't help but praise the features of the

technology from these machines with his friend. Can you elaborate on what

could possibly be some features of them.​

Answer 1

CPU are the brain of computer

Answer 2

Features of VAX Machine

Explanation:

• VAX is an example of CISC (Complex Instruction Set Computers).
• All VAX programs operate on a virtual address space of $2^{32}$ bytes. Which is further divided into system space and process space.
• The VAX architecture contains 16 general purpose registers numbered from R0-R15. Out of which registers R12, R13, R14 and R15 are reserved for special uses.
• VAX uses a variable-length instruction format. Each instruction has an operand code up to 1-2 bytes in size, which can be followed by up to 6 operand specifiers, depending upon the type of instruction sent.
• It also provides a nice amount of addressing modes such as register mode, register-deferred mode, auto-increment, auto-decrement mode. Base relative and Program counter relative modes are also available in VAX.