Introduction to DLX Machine

DLX Machine architecture

• DLX machine consists of 32 registers from r0 to r31

r0 always 0
r31 Jr Register
r1 to r30 can be used for program

• DLX machine RAM depends on dsim.cfg file

dsim.cfg file contains.

dsim new bus dsim.bus.Bus 

dsim new cpu dsim.dlxcpu.Dlxcpu
dsim connect bus$slot0 cpu$dlxbus

dsim new ram dsim.ram.Ram 00000 4000
dsim connect bus$slot2 ram$dlxbus

In this case, DLX machine consist of Ram upto 4000 from 0 (Ex 0,4,8,12..4000)

• DLX machine consists of IO Devices includes switches and lights

Address of lights and switches depends on dsim.cfg file

dsim new lights dsim.lights.Lights FFFFFFF8

dsim connect bus$slot1 lights$dlxbus

dsim new switches dsim.switches.Switches FFFFFFFC

dsim connect bus$slot3 switches$dlxbus

Address for lights      :FFFFFFF8
Address for switches:FFFFFFFC