The processor in this project has a RISC-like instruction set architecture. There are eight 2-bytes general purpose registers[ R0 to R7]. These registers are separate from the program counter and the stack pointer registers. The program counter (PC) spans the instructions memory address space that has a total size of 2 Megabytes. Each memory address has a 16-bit width (i.e., is word addressable). The instructions memory starts with the interrupts area (the very first address space from [0 down to 2^5-1]), followed by the instructions area (starting from [2^5 and down to 2^20]) as shown in Figure.1. By default, the PC is initialized with a value of (2^5) where the program code starts.
NOP
SETC
CLRC
NOT Rdst
INC Rdst
DEC Rdst
OUT Rdst
IN Rdst
MOV Rsrc, Rdst
ADD Rsrc, Rdst
SUB Rsrc, Rdst
AND Rsrc, Rdst
OR Rsrc, Rdst
SHL Rsrc, Imm
SHR Rsrc, Imm
PUSH Rdst
POP Rdst
LDM Rdst, Imm
LDD Rsrc, Rdst
STD Rsrc, Rdst
JZ Rdst
JN Rdst
JC Rdst
JMP Rdst
CALL Rdst
RET
RTI
Reset
Interrupt
Asmaa Adel |
Samaa Hazem |
norhan reda |
HodaGamal |