cpu_8080.c File Reference

This file contains a software abstraction of intel 8080 CPU, enough to run invaders. More...

#include <stdlib.h>
#include <inttypes.h>
#include <stdio.h>
#include "debug.h"
#include "cpu_8080.h"
#include "opcodes_8080.h"

Include dependency graph for cpu_8080.c:

Functions
cpu_state *	init_cpu_8080 (uint16_t pc, uint8_t(*in_cb)(uint8_t), void(*out_cb)(uint8_t, uint8_t))
	Initialize a new cpu_8080 instance structure. Everything is initialized to 0. More...
int	exec_inst (cpu_state *cpu)
	Executes the instruction pc is pointing to after incrementing it. More...
int	decompile_inst (cpu_state *cpu, uint16_t *next_inst)
	Recompile mode. More...
void	io_machine_OUT (UNUSED uint8_t port, UNUSED uint8_t data)
	Default function for IO_WRAP This function would be triggered on an OUT instruction. Usually overriden by the caller during setup. More...
uint8_t	io_machine_IN (UNUSED uint8_t port)
	Default function for IO_WRAP This function would be triggered on an IN instruction. Usually overriden by the caller during setup. More...
void	print_state (const cpu_state cpu)
	Print the state of CPU. More...

Detailed Description

This file contains a software abstraction of intel 8080 CPU, enough to run invaders.

Author

Pranay Garg (prana.nosp@m.yga@.nosp@m.andre.nosp@m.w.cm.nosp@m.u.edu)

Version

0.1

Date

2020-12-20

Function Documentation

decompile_inst()

int decompile_inst	(	cpu_state *	cpu,
		uint16_t *	next_inst
	)

Recompile mode.

Parameters

cpu
next_inst

Returns

int

exec_inst()

int exec_inst

(

cpu_state *

cpu

)

Executes the instruction pc is pointing to after incrementing it.

Parameters

cpu

Returns

int

init_cpu_8080()

cpu_state* init_cpu_8080	(	uint16_t	pc,
		uint8_t(*)(uint8_t)	in_cb,
		void(*)(uint8_t, uint8_t)	out_cb
	)

Initialize a new cpu_8080 instance structure. Everything is initialized to 0.

Parameters

pc	Program counter initialization
in_cb
out_cb

Returns

cpu_state* Pointer to the Malloced CPU state.

Note

• the user is responsible for freeing the memory (for the CPU) once it's done
• expects base to be initialized by the user to a 64KB aligned memory

Returns

cpu_state*

io_machine_IN()

uint8_t io_machine_IN

(

UNUSED uint8_t

port

)

Default function for IO_WRAP This function would be triggered on an IN instruction. Usually overriden by the caller during setup.

Parameters

port

Returns

uint8_t

io_machine_OUT()

void io_machine_OUT	(	UNUSED uint8_t	port,
		UNUSED uint8_t	data
	)

Default function for IO_WRAP This function would be triggered on an OUT instruction. Usually overriden by the caller during setup.

Parameters

port
data

print_state()

void print_state

(

const cpu_state

cpu

)

Print the state of CPU.

Parameters

cpu