more Z80 instructions, including conditional jumps

src/zvm_m65/z80_instr_general.s

@@ -14,6 +14,7 @@ Z80_illegal__FDCB:
 
 	; FALLTROUGH
 
+	; LD instructions with no effect
 Z80_instr_40:      ; LD B,B
 Z80_instr_49:      ; LD C,C
 Z80_instr_52:      ; LD D,D
@@ -21,6 +22,25 @@ Z80_instr_5B:      ; LD E,E
 Z80_instr_64:      ; LH H,H
 Z80_instr_6D:      ; LD L,L
 Z80_instr_7F:      ; LD A,A
+	; For interrupts (not emulated as of yet)
+Z80_instr_ED_46:   ; IM 0
+Z80_instr_ED_56:   ; IM 1
+Z80_instr_ED_5E:   ; IM 2
+	; Real NOP
 Z80_instr_00:      ; NOP
 
 	rts
+
+Z80_instr_F3:      ; DI
+
+	lda #$00
+	+skip_2_bytes_trash_nvz
+
+	; FALLTROUGH
+
+Z80_instr_FB:      ; EI
+
+	lda #Z80_PF
+	sta REG_IFF1
+	sta REG_IFF2
+	rts