diff options
Diffstat (limited to 'z80.cpu')
| -rw-r--r-- | z80.cpu | 96 |
1 files changed, 87 insertions, 9 deletions
@@ -1536,6 +1536,21 @@ fd 11101001 jp_iy z80_push mov wz pc +11CCC100 call_cond + local pch 8 + z80_fetch_immed16 + z80_check_cond C + + if istrue + + lsr pc 8 pch + meta high pch + meta low pc + z80_push + mov wz pc + + end + 11TTT111 rst local pch 8 lsr pc 8 pch @@ -1546,14 +1561,27 @@ fd 11101001 jp_iy mov scratch1 pc 11001001 ret - #TODO: confirm this goes through wz - local wzh 16 - meta high wzh - meta low wz + local pch 16 + cycles 1 + meta high pch + meta low pc z80_pop - lsl wzh 8 wzh - or wzh wz wz - mov wz pc + lsl pch 8 pch + or pch pc pc + +11CCC000 ret_cond + local pch 16 + cycles 1 + z80_check_cond C + if istrue + + meta high pch + meta low pc + z80_pop + lsl pch 8 pch + or pch pc pc + + end 11011011 in_abs z80_fetch_immed @@ -2077,7 +2105,7 @@ ed 10110000 ldir if pvflag add 1 pc wz - sub 1 pc pc + sub 2 pc pc cycles 5 end @@ -2087,10 +2115,60 @@ ed 10111000 lddr if pvflag add 1 pc wz - sub 1 pc pc + sub 2 pc pc cycles 5 end +z80_cpd_cpi + local tmp 16 + local tmp8 8 + arg change 16 + + z80_fetch_mod_hl change + sub scratch1 a tmp8 + update_flags SZHXN1 + + and 0x2 tmp8 tmp8 + lsl tmp8 4 tmp8 + and 0x88 last_flag_result last_flag_result + or tmp8 last_flag_result last_flag_result + + 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 + +ed 10100001 cpi + z80_cpd_cpi 1 + +ed 10101001 cpd + z80_cpd_cpi -1 + +ed 10110001 cpir + z80_cpd_cpi 1 + if pvflag + + add 1 pc wz + sub 2 pc pc + cycles 5 + + end + +ed 10111001 cpdr + z80_cpd_cpi -1 + if pvflag + + add 1 pc wz + sub 2 pc pc + cycles 5 + + end
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