woodstock . / Mbed 2 deprecated Nucleo_Ex06_EMU

I have ported my old project “pNesX” game console emulator to the nucleo.

Dependencies:   SDFileSystem mbed

Intro

I have ported my old project “pNesX” to the STM32 Nucleo. The pNesX is a NES emulator for the PlayStation that I have created 16 years ago!

Emulation part was almost without change, the sound part was newly added.

Parts

STM32 Nucleo F446RE
QVGA 2.2 TFT SPI (with the SD card slot)
Audio jack(TS or TRS)
USB Connector
Register 100k, 10k, 4.7k, 100
Capacitor 0.01uF, 2.2uF
Breadboard
Wires
Computer Speakers
USB GamePad

Wiring diagram

/media/uploads/beaglescout007/nucleo_ex06_emu.png

TFT J2Nucleo
VCC3V3
GNDGND
CSPB_5(D4)
ResetPA_10(D2) Pull Up(100k)
D/CPA_8(D7)
MOSIPA_7(D11)
SCKPA_5(D13)
LEDLED-100ohm-3V3
MISOPA_6(D12)
TFT J4Nucleo
SD_CSPA_9
SD_MOSIPB_15
SD_MISOPB_14
SD_SCKPB_13
AudioNucleo
TIPPA_4(A2)
USB con.Nucleo
GNDGND
+PA_12
-PA_11
5V5V

https://youtu.be/jL24IjT6LnI

Limitations

  • Since the rest of the RAM is about 50kbyte, maximum capacity of the game ROM is about 50kbyte.
  • The length of the file name up to 32 characters.
  • The number of files in the folder is up to 100.

Used Library

K6502.h

Committer:
beaglescout007
Date:
2016-04-03
Revision:
0:3dac1f1bc9e0

File content as of revision 0:3dac1f1bc9e0:

/*===================================================================*/
/*                                                                   */
/*  K6502.h : Header file for K6502                                  */
/*                                                                   */
/*  1999/10/19  Racoon  New preparation                              */
/*                                                                   */
/*===================================================================*/

#ifndef K6502_H_INCLUDED
#define K6502_H_INCLUDED

// Type definition
#ifndef DWORD
typedef unsigned long  DWORD;
//typedef unsigned int  DWORD;
#endif

#ifndef WORD
typedef unsigned short WORD;
//typedef unsigned short WORD;
#endif

#ifndef BYTE
typedef unsigned char  BYTE;
//typedef char  BYTE;
#endif

#ifndef NULL
#define NULL 0
#endif

/* 6502 Flags */
#define FLAG_C 0x01
#define FLAG_Z 0x02
#define FLAG_I 0x04
#define FLAG_D 0x08
#define FLAG_B 0x10
#define FLAG_R 0x20
#define FLAG_V 0x40
#define FLAG_N 0x80

/* Stack Address */
#define BASE_STACK   0x100

/* Interrupt Vectors */
#define VECTOR_NMI   0xfffa
#define VECTOR_RESET 0xfffc
#define VECTOR_IRQ   0xfffe

// NMI Request
#define NMI_REQ  NMI_State = 0;

// IRQ Request
#define IRQ_REQ  IRQ_State = 0;

// Emulator Operation
void K6502_Init();
void K6502_Reset();
void K6502_Set_Int_Wiring( BYTE byNMI_Wiring, BYTE byIRQ_Wiring );
void K6502_Step( register WORD wClocks );

// I/O Operation (User definition)
static inline BYTE K6502_Read( WORD wAddr);
static inline WORD K6502_ReadW( WORD wAddr );
static inline BYTE K6502_ReadZp( BYTE byAddr );
static inline WORD K6502_ReadZpW( BYTE byAddr );
static inline BYTE K6502_ReadAbsX();
static inline BYTE K6502_ReadAbsY();
static inline BYTE K6502_ReadIY();

static inline void K6502_Write( WORD wAddr, BYTE byData );
static inline void K6502_WriteW( WORD wAddr, WORD wData );

// The state of the IRQ pin
extern BYTE IRQ_State;

// The state of the NMI pin
extern BYTE NMI_State;

#endif /* !K6502_H_INCLUDED */