Mercurial > repos > blastem
comparison z80.cpu @ 1719:fb5ae8c20b85
Fix cp instruction in new Z80 core and implement its DD/FD prefixes
author | Michael Pavone <pavone@retrodev.com> |
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date | Wed, 30 Jan 2019 21:47:35 -0800 |
parents | c7d18b8ec29a |
children | 1648c685083a |
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1718:c7d18b8ec29a | 1719:fb5ae8c20b85 |
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877 z80_fetch_immed | 877 z80_fetch_immed |
878 xor a scratch1 a | 878 xor a scratch1 a |
879 update_flags SZYH0PXN0C0 | 879 update_flags SZYH0PXN0C0 |
880 | 880 |
881 10111RRR cp_reg | 881 10111RRR cp_reg |
882 mov main.R last_flag_result | |
882 cmp main.R a | 883 cmp main.R a |
883 update_flags SZYHVXN1C | 884 update_flags SZHVN1C |
885 | |
886 dd 10111100 cp_ixh | |
887 lsr ix 8 last_flag_result | |
888 cmp last_flag_result a | |
889 update_flags SZHVN1C | |
890 | |
891 dd 10111101 cp_ixl | |
892 mov ix last_flag_result | |
893 cmp last_flag_result a | |
894 update_flags SZHVN1C | |
895 | |
896 fd 10111100 cp_iyh | |
897 lsr iy 8 last_flag_result | |
898 cmp last_flag_result a | |
899 update_flags SZHVN1C | |
900 | |
901 fd 10111101 cp_iyl | |
902 mov iy last_flag_result | |
903 cmp last_flag_result a | |
904 update_flags SZHVN1C | |
884 | 905 |
885 10111110 cp_hl | 906 10111110 cp_hl |
886 z80_fetch_hl | 907 z80_fetch_hl |
908 mov scratch1 last_flag_result | |
887 cmp scratch1 a | 909 cmp scratch1 a |
888 update_flags SZYHVXN1C | 910 update_flags SZHVN1C |
911 | |
912 dd 10111110 cp_ixd | |
913 z80_fetch_index ix | |
914 mov scratch1 last_flag_result | |
915 cmp scratch1 a | |
916 update_flags SZHVN1C | |
917 | |
918 fd 10111110 cp_iyd | |
919 z80_fetch_index iy | |
920 mov scratch1 last_flag_result | |
921 cmp scratch1 a | |
922 update_flags SZHVN1C | |
889 | 923 |
890 11111110 cp_immed | 924 11111110 cp_immed |
891 z80_fetch_immed | 925 z80_fetch_immed |
926 mov scratch1 last_flag_result | |
892 cmp scratch1 a | 927 cmp scratch1 a |
893 update_flags SZYHVXN1C | 928 update_flags SZHVN1C |
894 | 929 |
895 00RRR100 inc_reg | 930 00RRR100 inc_reg |
896 add 1 main.R main.R | 931 add 1 main.R main.R |
897 update_flags SZYHVXN0 | 932 update_flags SZYHVXN0 |
898 | 933 |