readme.md

multi-core CPU

this is the udgrade of schoolMIPS processor. Now it is multi-core (2) CPU with common RAM memory

Architecture

Common memory is divided on two equal parts. Each core can write only in its own part, but can read each cell of the memory. This approach have pros and cons: it is easier to design, but working with some types of data can be difficult to manage (for example, queue. Each core before working should check the latest version on its own write-part and on the write-part of the another core. It can read every cell of the memory:)

Test program

In the test program placed in scrips folder the second core is continuosly writing in the memory growing number. The address is 0x0. The first core is reading it from the common memory and saving it in t1 register which can be displayed by the 9-value on switchers.

Instruction

1. Start the script of replacing files. The choice depends on your OS
2. The usual sequence of schoolMIPS

Important notes

file for windows is not completed. Use git bash, cygwin, et cetera on windows PC to accomplish step 1

In the examples core 1 is reading information from the memory because it is connected to peripherals (value of registers can be displayed on 7 segments displays)

Core 2 is not connected to peripherals because of my laziness

For this type of cores the memory is initialized from 0x0, so it won't be compiled in MARS program