#define PORTINIT P6DIR |= 0xA7

#define LE16_ON P6OUT |= BIT5
#define LE16_OFF P6OUT &= ~BIT5

#define OE16_ON P6OUT |= BIT7
#define OE16_OFF P6OUT &= ~BIT7

#define WE_ON P6OUT |= BIT0
#define WE_OFF P6OUT &= ~BIT0

#define OE_ON P6OUT |= BIT1
#define OE_OFF P6OUT &= ~BIT1

#define CE_ON P6OUT |= BIT2
#define CE_OFF P6OUT &= ~BIT2

#define LBUSout P4OUT
#define MBUSout P5OUT

#define LBUSin P4IN
#define MBUSin P5IN

#define LBUSdir P4DIR
#define MBUSdir P5DIR

#define INPUT 0x00
#define OUTPUT 0xff



void SRAM_Init(void);
void SRAM_Write(unsigned char byte, unsigned long Address);
unsigned char SRAM_Read(unsigned long Address);

void SRAM_Init(void)
{
PORTINIT;

LE16_OFF;
OE16_ON;

CE_ON;
WE_ON;
OE_ON;
}

void SRAM_Write(unsigned char byte, unsigned long Address)
{
LBUSdir = OUTPUT;
MBUSdir = OUTPUT;

LBUSout = Address & 0x00FF;
MBUSout = (Address & 0xFF00)>>8;

LE16_ON;
LE16_OFF;

LBUSout = byte;
MBUSout = (Address & 0xFF0000)>>16;

OE16_OFF;
WE_OFF;
WE_ON;
OE16_ON;

LBUSdir = INPUT;
MBUSdir = INPUT;

}

unsigned char SRAM_Read(unsigned long Address)
{
LBUSdir = OUTPUT;
MBUSdir = OUTPUT;

LBUSout = Address & 0x00FF;
MBUSout = (Address & 0xFF00)>>8;

LE16_ON;
LE16_OFF;

LBUSdir = INPUT;
MBUSout = (Address & 0xFF0000)>>16;

OE16_OFF;
OE_OFF;
OE_ON;
OE16_ON;

MBUSdir = INPUT;

return LBUSin;
}