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comparison z80.cpu @ 1731:366b65d91614

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Implemented DD/FD prefixes for EX in new Z80 core
author Michael Pavone <pavone@retrodev.com>
date Sat, 02 Feb 2019 20:43:20 -0800
parents 71f7827ff30a
children 3b286be82ea5
comparison
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1730:71f7827ff30a 1731:366b65d91614
664 ocall read_8 664 ocall read_8
665 xchg l scratch1 665 xchg l scratch1
666 cycles 1 666 cycles 1
667 mov sp scratch2 667 mov sp scratch2
668 ocall write_8 668 ocall write_8
669 add 1 sp wz 669 add 1 sp scratch1
670 mov wz scratch1
671 ocall read_8 670 ocall read_8
672 xchg h scratch1 671 xchg h scratch1
673 cycles 2 672 cycles 2
674 mov wz scratch2 673 add 1 sp scratch2
675 ocall write_8 674 ocall write_8
675 lsl h 8 wz
676 or l wz wz
677
678 dd 11100011 ex_sp_ix
679 mov sp scratch1
680 ocall read_8
681 mov scratch1 wz
682 mov ix scratch1
683 cycles 1
684 mov sp scratch2
685 ocall write_8
686 add 1 sp scratch1
687 ocall read_8
688 lsl scratch1 8 scratch1
689 or scratch1 wz wz
690 lsr ix 8 scratch1
691 cycles 2
692 add 1 sp scratch2
693 ocall write_8
694 mov wz ix
695
696 fd 11100011 ex_sp_iy
697 mov sp scratch1
698 ocall read_8
699 mov scratch1 wz
700 mov iy scratch1
701 cycles 1
702 mov sp scratch2
703 ocall write_8
704 add 1 sp scratch1
705 ocall read_8
706 lsl scratch1 8 scratch1
707 or scratch1 wz wz
708 lsr iy 8 scratch1
709 cycles 2
710 add 1 sp scratch2
711 ocall write_8
712 mov wz iy
676 713
677 10000RRR add_reg 714 10000RRR add_reg
678 add a main.R a 715 add a main.R a
679 update_flags SZYHVXN0C 716 update_flags SZYHVXN0C
680 717