#include <stdio.h>
/*
    DDRx  - The Port x Data Direction Register - read/write
    PORTx - The Port x Data Register - read/write
    PINx  - The Port x Input Pins Register - read only 
*/

#define SERIALBUFSIZE         11
//char serialBuffer[SERIALBUFSIZE];
//byte setBufPointer = 0;

#define  D2     10
#define  D3     11
#define  DEVVCC 12
#define  REC_TYPE 0
#define  OUTS   10
#define  INS     8

unsigned long addrSize = 1024;


void setup() {                
  Serial.begin(115200);  
  delay(1000);
  PORTD = 0xFF;
  PORTC = 0xFF;
  PORTB = 0xFF; // needed for switch from tristate to output low
  PORTA = 0xFF;
  DDRD = DDRD | 0b11111100; // switch all but serial pins to output
  DDRC = 0x00;  // input
  DDRB = 0xFF;  // output
  DDRA = 0xFF;  // output
  Serial.println("PAL16R6 read v1.0");
  Serial.println("1,  2,  3,  4,  5,  6,  7,  8,  9,  11, 12,  13,  14,  15,  16,  17,  18,  19");
  Serial.println("D2, B7, B6, B5, B4, B3, B2, B1, B0, D3, C0,  C1,  C2,  C3,  C4,  C5,  C6,  C7");
  Serial.println("CLK,IN0,IN1,IN2,IN3,IN4,IN5,IN6,IN7,IN8,OUT0,OUT1,OUT2,OUT3,OUT4,OUT5,OUT6,OUT7");
  Serial.println("                                         R                                   R");
  Serial.println("                                        A0,                                 A1");
  Serial.println("D3,D2  A1-A0,B7-B0  C7-C0");
  delay(100);
  digitalWrite(D3,0);
}

void loop() {

  int addrPoint;
  byte data;
  char fmtStr[20];
  
  for (addrPoint = 0; addrPoint < addrSize; addrPoint++) {
 //   sprintf(fmtStr, "%04X\n", addrPoint);
 //   Serial.print(fmtStr);
    digitalWrite(D2,0);
    Serial.print("00 ");
    printBinary(addrPoint, OUTS);
    setAddress(addrPoint);
    printBinary(getData(), INS);
    Serial.println();

    digitalWrite(D2,1);
    Serial.print("01 ");
    printBinary(addrPoint, OUTS);
    printBinary(getData(), INS);
    Serial.println();
  }
  while(1) {} // halt
}

void setAddress(int address) {
  byte highAddr;
  byte lowAddr;
  highAddr = address >> 8;
  lowAddr  = address & 0xFF;
  PORTA = highAddr;
  PORTB = lowAddr;  
}

byte getData(void) {
  return PINC; 
}

void printBinary(int address, int base) {
  int bit;
  int bitCounter;
  address = address & 0xFFFF;
  for (bitCounter = base - 1; bitCounter >= 0; bitCounter--) {
    bit = (address & (1 << bitCounter)) ? 1 : 0;
    Serial.print(bit, DEC);
  }
  Serial.print(" ");
}