Implement call nn

rtl/cpu/cpu_pkg.svh

@@ -11,7 +11,8 @@ package cpu_pkg;
         ST2_DEC,
         ST3_DEC,
         ST3_EXEC,
-        ST4_EXEC
+        ST4_EXEC,
+        ST5_EXEC
     } state_t;
 
     typedef enum logic [2:0] {
@@ -66,7 +67,9 @@ package cpu_pkg;
         OP_SRC_OPERAND8,
         OP_SRC_MEMORY,
         OP_SRC_OPERAND16,
-        OP_SRC_REG16
+        OP_SRC_REG16,
+        OP_SRC_PC_L,
+        OP_SRC_PC_H
     } op_src_t;
 
     typedef enum {
@@ -77,12 +80,15 @@ package cpu_pkg;
     } op_dest_t;
 
     typedef enum {
-        SP_SRC_OPERAND16
+        SP_SRC_OPERAND16,
+        SP_SRC_INC,
+        SP_SRC_DEC
     } sp_src_t;
 
     typedef enum {
         ADR_SRC_PC,
         ADR_SRC_HL,
+        ADR_SRC_SP,
         ADR_SRC_REG8, // extended with FF
         ADR_SRC_REG16,
         ADR_SRC_OPERAND8, // extended with FF
@@ -91,7 +97,8 @@ package cpu_pkg;
 
     typedef enum {
         PC_SRC_SEQ,
-        PC_SRC_OPERAND8
+        PC_SRC_OPERAND8,
+        PC_SRC_OPERAND16
     } pc_src_t;
 
 endpackage