start implementing unofficial opcodes

1 files changed, 148 insertions, 1 deletions

diff --git a/cpu.c b/cpu.c
index 7ef4985..e3bb7d5 100644
--- a/cpu.c
+++ b/cpu.c
@@ -177,6 +177,8 @@ branch(uint16_t addr, bool cond)
         regs.pc = addr;
 }
 
+/* OFFICIAL OPCODES */
+
 void
 ADC(uint16_t arg)
 {
@@ -696,6 +698,140 @@ TYA(uint16_t arg)
         STATUS_UPDATE_NZ(regs.a);
 }
 
+/* UNOFFICIAL OPCODES */
+
+void
+AAC(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+AAX(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+ARR(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+ASR(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+ATX(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+AXA(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+AXS(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+DCP(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+DOP(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+ISC(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+KIL(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+LAR(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+LAX(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+RLA(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+RRA(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+SLO(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+SRE(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+SXA(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+SYA(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+TOP(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+XAA(uint16_t arg)
+{
+        NOP(0);
+}
+
+void
+XAS(uint16_t arg)
+{
+        NOP(0);
+}
+
 static void
 interpret(void)
 {
@@ -711,7 +847,18 @@ interpret(void)
                 printf("%02X", op);
                 for (uint8_t i = 0; i < opcodes[op].bytes - 1; i++)
                         printf(" %02X", peek(regs.pc + i));
-                printf("\t%s ", opcodes[op].name);
+
+                if (opcodes[op].unofficial) {
+                        if (opcodes[op].bytes == 1)
+                                printf("       ");
+                        else if (opcodes[op].bytes == 2)
+                                printf("    ");
+                        else if (opcodes[op].bytes == 3)
+                                putchar(' ');
+                        putchar('*');
+                } else
+                        putchar('\t');
+                printf("%s ", opcodes[op].name);
 
                 mode = opcodes[op].mode;
                 arg = opcode_mem(mode);