z80.h: fix IM0

Author: floooh

chips/z80.h

@@ -2718,7 +2718,7 @@ uint64_t z80_tick(z80_t* cpu, uint64_t pins) {
         case 1637: pins|=(Z80_M1|Z80_IORQ);_step(); // int_im0 T:1
         case 1638: _wait();cpu->opcode=_z80_get_db(pins);_step(); // int_im0 T:2
         case 1639: pins=_z80_refresh(cpu,pins);_step(); // int_im0 T:3
-        case 1640: cpu->step=cpu->opcode; cpu->addr=cpu->hl;_step(); // int_im0 T:4
+        case 1640: cpu->addr=cpu->hl;_goto(cpu->opcode);_step(); // int_im0 T:4
         case 1641: _fetch(); // int_im0 T:5
         case 1642: cpu->iff1=cpu->iff2=false;_step(); // int_im1 T:0
         case 1643: pins|=(Z80_M1|Z80_IORQ);_step(); // int_im1 T:1

codegen/z80_desc.yml

@@ -685,7 +685,7 @@ int_im0:
     - { type: generic, tcycles: 1, action: "_wait();cpu->opcode=_z80_get_db(pins)" }
     # combined refresh and branch to loaded instruction cycle
     - { type: generic, tcycles: 1, action: "pins=_z80_refresh(cpu,pins)" }
-    - { type: generic, tcycles: 1, action: "cpu->step=cpu->opcode; cpu->addr=cpu->hl" }
+    - { type: generic, tcycles: 1, action: "cpu->addr=cpu->hl;_goto(cpu->opcode)" }
 
 int_im1:
   flags: { special: true }