logic.c File Reference

Implementation of the logic.h interface. More...

#include "lc3.h"
#include "hardware.h"
#include "field.h"
#include "logic.h"

Functions
LC3_WORD	logic_read_reg (int regNum)
void	logic_write_reg (int regNum, LC3_WORD val)
LC3_WORD	logic_read_memory (LC3_WORD addr)
void	logic_write_memory (LC3_WORD addr, LC3_WORD value)
void	logic_fetch_instruction (instruction_t *inst)
int	logic_decode_instruction (instruction_t *inst)
int	logic_execute_instruction (instruction_t *inst)
LC3_WORD	logic_MARMUX (instruction_t *inst, int ADDRMUX1sel, int ADDRMUX2sel)

Detailed Description

This is a implementation of the interface that you will write for the assignment.

Author

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Function Documentation

int logic_decode_instruction

(

instruction_t *

inst

)

Todo:

implement this function

int logic_execute_instruction

(

instruction_t *

inst

)

Todo:

implement this function

void logic_fetch_instruction

(

instruction_t *

inst

)

Todo:

implement this function

LC3_WORD logic_MARMUX	(	instruction_t *	inst,
		int	ADDRMUX1sel,
		int	ADDRMUX2sel
	)

Todo:

implement this function

LC3_WORD logic_read_memory

(

LC3_WORD

addr

)

This function encapsulates the details of how memory is actually read. It must deal with getting the MAR set correctly, peforming the read, and returning a value. This involve accessing the resources described in the hardware.h file.

LC3_WORD logic_read_reg

(

int

regNum

)

This function encapsulates the details of how to get the value of a register. While it is nothing more than a direct call to a function described in hardware.h, it means that the programmer need only understand this set of methods. Only the implementor of this code will need to deal with the hardware interface.

void logic_write_memory	(	LC3_WORD	addr,
		LC3_WORD	value
	)

Todo:

implement this function

void logic_write_reg	(	int	regNum,
		LC3_WORD	val
	)

Todo:

implement this function