Mercurial > repos > blastem
diff z80.cpu @ 1733:1f0a86f5e055
Implemented LDI in new Z80 core
author | Michael Pavone <pavone@retrodev.com> |
---|---|
date | Sat, 02 Feb 2019 23:02:19 -0800 |
parents | 3b286be82ea5 |
children | 88fbc4e711fd |
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--- a/z80.cpu Sat Feb 02 21:22:02 2019 -0800 +++ b/z80.cpu Sat Feb 02 23:02:19 2019 -0800 @@ -2015,4 +2015,46 @@ z80_set_index B tmp fdcb 11BBBRRR set_iyd_reg - z80_set_index B main.R \ No newline at end of file + z80_set_index B main.R + +ed 10100000 ldi + local tmp 16 + local tmp8 8 + lsl h 8 tmp + or l tmp tmp + mov tmp scratch1 + add 1 tmp tmp + mov tmp l + lsr tmp 8 h + ocall read_8 + cycles 1 + + add a scratch1 tmp8 + update_flags H0XN0 + + and 0x2 tmp8 tmp8 + lsl 4 tmp8 tmp8 + and 0x88 last_flag_result last_flag_result + or tmp8 last_flag_result last_flag_result + + lsl d 8 tmp + or e tmp tmp + mov tmp scratch2 + add 1 tmp tmp + mov tmp e + lsr tmp 8 d + ocall write_8 + + lsl b 8 tmp + or c tmp tmp + sub 1 tmp tmp + + mov tmp c + lsr tmp 8 b + mov c pvflag + or b pvflag pvflag + + + + cycles 5 + \ No newline at end of file