![](/media/cache/profiles/951e5e38cb91253e90bcae5ccd7baf3c.jpg.50x50_q85.jpg)
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
TFT J2 | Nucleo |
---|---|
VCC | 3V3 |
GND | GND |
CS | PB_5(D4) |
Reset | PA_10(D2) Pull Up(100k) |
D/C | PA_8(D7) |
MOSI | PA_7(D11) |
SCK | PA_5(D13) |
LED | LED-100ohm-3V3 |
MISO | PA_6(D12) |
TFT J4 | Nucleo |
---|---|
SD_CS | PA_9 |
SD_MOSI | PB_15 |
SD_MISO | PB_14 |
SD_SCK | PB_13 |
Audio | Nucleo |
---|---|
TIP | PA_4(A2) |
USB con. | Nucleo |
---|---|
GND | GND |
+ | PA_12 |
- | PA_11 |
5V | 5V |
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
- SDFileSystem by Neil Thiessen
- F401RE-USBHost by Norimasa Okamoto
- USBHostGamepad by Yuuichi Akagawa
Diff: K6502.h
- Revision:
- 0:3dac1f1bc9e0
diff -r 000000000000 -r 3dac1f1bc9e0 K6502.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/K6502.h Sun Apr 03 07:45:29 2016 +0000 @@ -0,0 +1,82 @@ +/*===================================================================*/ +/* */ +/* 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 */ + +