Add I/O to 6800

chip-6800/testprogram.js

@@ -4,20 +4,26 @@ testprogramAddress=0x0000;
 // we want to auto-clear the console if any output is sent by the program
 var consoleboxStream="";
 
-// for opcodes, see ftp://ftp.comlab.ox.ac.uk/pub/Cards/txt/6800.txt
+// demonstrate write hook
+writeTriggers[0x8000]="consoleboxStream += String.fromCharCode(d);"+
+                      "consolebox.innerHTML = consoleboxStream;";
+
+// demonstrate read hook (not used by this test program)
+readTriggers[0x8004]="((consolegetc==undefined)?0:0xff)";  // return zero until we have a char
+readTriggers[0x8000]="var c=consolegetc; consolegetc=undefined; (c)";
+
+// for opcodes, see http://www.textfiles.com/programming/CARDS/6800
 
 testprogram = [
   0xce, 0x43, 0x21,  // LDX #4321
   0x35,              // TXS
-  0xc6, 0xfb,        // LDAB #$FB
+  0xce, 0x80, 0x00,  // LDX #8000
+  0xc6, 0x40,        // LDAB #$40
   0xbd, 0x00, 0x10,  // JSR $0010
-  0x7e, 0x00, 0x04,  // JMP $0004
+  0x7e, 0x00, 0x09,  // JMP $0009
   0x01,              // NOP
-  0x01,              // NOP
-  0x01,              // NOP
-  0x01,              // NOP
-  0x08,              // INX
   0x4a,              // DECA
+  0xe7, 0x00,        // STAB 0, X
   0x7c, 0x00, 0x0f,  // INC $0F
   0x0d,              // SEC
   0xc9, 0x02,        // ADCB #$02