remove dead code

apple/pia6821.cpp

@@ -1,43 +0,0 @@
-#include "pia6821.h"
-
-PIA6821::PIA6821()
-{
-}
-
-PIA6821::~PIA6821()
-{
-}
-
-uint8_t PIA6821::read(uint8_t addr)
-{
-  uint8_t rv;
-
-  switch (addr) {
-  case DDRA:
-    if (cra & 0x04) { // DDR or Peripherial Interface access control
-      // peripheral
-      //      rv = readPeripheralA();
-      // FIXME continue here
-    } else {
-      rv = ddra;
-    }
-    break;
-  case CTLA:
-    rv = cra;
-    break;
-  case DDRB:
-    if (crb & 0x04) {
-      //      rv = readPeripheralB();
-      // FIXME continue here
-    } else {
-      rv = ddrb;
-    }
-    break;
-  case CTLB:
-    rv = crb;
-    break;
-  }
-
-  return rv;
-}
-

apple/pia6821.h

@@ -1,31 +0,0 @@
-#ifndef _PIA6821_H
-#define _PIA6821_H
-
-#include <stdint.h>
-
-// http://webpages.charter.net/coinopcauldron/piaarticle.html
-
-#define DDRA 0
-#define CTLA 1
-#define DDRB 2
-#define CTLB 3
-
-class PIA6821 {
- public:
-  PIA6821();
-  ~PIA6821();
-
-  uint8_t read(uint8_t addr);
-
-
- private:
-  uint8_t porta, portb;
-  uint8_t ddra, ddrb;
-  uint8_t cra, crb; // control registers
-  /*
-  2 ports - porta, portb
-  */
-
-};
-
-#endif