diff options
Diffstat (limited to 'z80.cpu')
| -rw-r--r-- | z80.cpu | 89 |
1 files changed, 85 insertions, 4 deletions
@@ -54,10 +54,12 @@ regs io_chunks 32 io_mask 32 int_cycle 32 + int_end_cycle 32 int_value 8 nmi_cycle 32 system ptrvoid - fastmem ptr8 64 + fastread ptr8 64 + fastwrite ptr8 64 mem_pointers ptr8 4 flags @@ -81,6 +83,7 @@ z80_op_fetch add 1 pc pc z80_run_op + #printf "Z80: %X @ %d\n" pc cycles z80_op_fetch dispatch scratch1 @@ -88,7 +91,6 @@ z80_interrupt cmp int_cycle cycles if >=U - mov 0xFFFFFFFF int_cycle mov 0 iff1 mov 0 iff2 cycles 6 @@ -1535,12 +1537,18 @@ ed 01DDD100 neg 11110011 di mov 0 iff1 mov 0 iff2 - #TODO: update interrupt/sync cycle + update_sync 11111011 ei mov 1 iff1 mov 1 iff2 - #TODO: update interrupt/sync cycle + update_sync + cmp int_cycle cycles + if >=U + + add 1 cycles int_cycle + + end ed 01D00110 im0 mov 0 imode @@ -1654,6 +1662,25 @@ fd 11101001 jp_iy lsl pch 8 pch or pch pc pc +ed 01001101 reti + local pch 16 + cycles 1 + meta high pch + meta low pc + z80_pop + lsl pch 8 pch + or pch pc pc + +ed 01NN1101 retn + mov iff2 iff1 + local pch 16 + cycles 1 + meta high pch + meta low pc + z80_pop + lsl pch 8 pch + or pch pc pc + 11CCC000 ret_cond local pch 16 cycles 1 @@ -1691,6 +1718,60 @@ ed 01RRR001 out_bc mov main.R scratch1 ocall io_write8 +z80_outi_outd + arg change 16 + local tmp 8 + cycles 1 + z80_fetch_hl + + and 0x80 scratch1 nflag + + lsl h 8 scratch2 + or l scratch2 scratch2 + add change scratch2 scratch2 + mov scratch2 l + lsr scratch2 8 h + + add l scratch1 tmp + update_flags C + and 7 tmp tmp + + lsl 8 b scratch2 + or c scratch2 scratch2 + ocall io_write8 + + lsl 8 b wz + or c wz wz + + sub 1 b b + update_flags SZYX + xor b tmp tmp + update_flags P + lsr chflags 4 tmp + or tmp chflags chflags + +ed 10100011 outi + z80_outi_outd 1 + +ed 10110011 otir + z80_outi_outd 1 + if zflag + else + sub 2 pc pc + cycles 5 + end + +ed 10101011 outd + z80_outi_outd -1 + +ed 10111011 otdr + z80_outi_outd -1 + if zflag + else + sub 2 pc pc + cycles 5 + end + 00000111 rlca rol a 1 a update_flags YH0XN0C |