Bounded and Unbounded mailbox

Two types of mailbox.

1) Bounded mailbox

2) Unbounded mailbox

REQUIREMENT
Bounded mailbox
It requires to transfer limited packets.

Unbounded mailbox
Used to transfer to unlimited packets.


APPLICATION
Bounded mailbox

- Fixed(2KB) number of memory size need to verify

Unbounded mailbox

- To make a generic checker/scoreboard for different size of memories

ANALOGY

Bounded mailbox is same as limited internet pack. Like limited size of data is available

in data pack.

Similarly, limited size of packets can store.

An unbounded mailbox is the same as an unlimited internet pack. Where unlimited data is available to use the internet. Similarly, an unlimited size of packets can store.

USER WANTS CODE

// UNBOUNDED MAILBOX EXAMPLE
program mailbox;
  mailbox m1;
  int i,j;
  initial
    begin
      m1 = new;  // unbounded mailbox, it can store unlimited packets
      repeat(5)  // multiple packets we can verify, change the vlaue from 5 to any number
        begin
          m1.put(i); //put packet/value in mailbox
          i++;
          $display("Unbounded mail box value of i = %d",i);
          
        end
    end
endprogram

To run simulation click on below link:

Link: https://www.edaplayground.com/x/6Fwp

// BOUNDED MAILBOX EXAMPLE
program mailbox;
  mailbox m1 = new(3); // bound the mailbox with 3, it can not store more than 3 packets
  int i,j;
  initial
    begin
      repeat(5)  // limited packets we can verify, change the vlaue from 5 to any number
        begin
          m1.put(i); //put packet/value in mailbox
          i++;
          $display("Bounded with 3 value of i = %d",i); // will reach to only 3 as mailbox is bounded with 3 
        end
    end
endprogram

To run simulation click on below link:

Link: https://www.edaplayground.com/x/znA