- [NEW] While debugging you can go back/forward in time

- [NEW] Step by step execution with F6
- [NEW] Memory is tagged as code or data while executing, so later it can be properly disassembled
- [NEW] "reg X value" to set the value of X register
- [FIX] IX opcode table had errors
- [FIX] opcodes with two parameters where printed incorrectly on the disassembler
- [FIX] opcodes can't be lager than 4 bytes
- [CHG] Berserk mode and fernando martin TAP by default, to help with debugging

z80.cpp

@@ -6,6 +6,7 @@
 namespace z80
 {
     static uint8_t *memory = nullptr;
+    static uint8_t memtag[65536];
     static uint32_t t = 0;
     static uint16_t current_opcode_address = 0;
 
@@ -145,12 +146,15 @@ namespace z80
     {
         if (z80debug::isbreak(addr, 2)) z80debug::stop();
         t+=3;
+        memtag[addr] = MEMTAG_DATA;
         return memory[addr];
     }
 
     uint8_t READ_MEM_8()
     {
-        return READ_MEM_8(rPC++);
+        uint8_t data = READ_MEM_8(rPC);
+        memtag[rPC++] = MEMTAG_CODE;
+        return data;
     }
 
     uint8_t READ_M1()
@@ -178,6 +182,8 @@ namespace z80
         if (z80debug::isbreak(addr, 4)) z80debug::stop();
         //if (z80debug::debugging())
         z80debug::setmemmodified(addr);
+        memtag[addr] = MEMTAG_DATA;
+
         return value;
     }
 
@@ -1033,6 +1039,7 @@ namespace z80
     void reset(uint8_t* mem)
     {
         memory = mem;
+        for (int i=0; i<65536; ++i) memtag[i] = MEMTAG_NONE;
         rPC = iff1 = iff2 = im = 0;
         rAF = rAF2 = rBC = rBC2 = rDE = rDE2 = rHL = rHL2 = rIX = rIY = rSP = 0xffff;
         t = 0;
@@ -1061,6 +1068,7 @@ namespace z80
         current_opcode_address = rPC;
         t = 0;
         const uint8_t opcode = READ_M1();
+        memtag[current_opcode_address] = MEMTAG_INST;
         uint16_t tmp;
 
         switch (opcode)
@@ -1340,6 +1348,8 @@ namespace z80
 
         if (pending_ei==2) { pending_ei=0; actualEI(); }
         if (pending_ei==1) pending_ei=2;
+
+        z80debug::history::store();
         return t;
     }
 
@@ -2720,4 +2730,7 @@ namespace z80
     uint16_t getPC() { return rPC; }
 
     void setPC(const uint16_t addr) { rPC = addr; }
+
+    uint8_t getMemTag(const uint16_t addr) { return memtag[addr]; };
+
 }