diff options
| author | Michael Pavone <pavone@retrodev.com> | 2019-02-02 20:43:20 -0800 |
|---|---|---|
| committer | Michael Pavone <pavone@retrodev.com> | 2019-02-02 20:43:20 -0800 |
| commit | 7b52486266a9eb523e699831c6f721d1da365d03 (patch) | |
| tree | 695b0d1459d50b4688c6d4058b245c5042e95275 | |
| parent | eb634f4fb3f0253965f15ed0655fcfea437b6f41 (diff) | |
Implemented DD/FD prefixes for EX in new Z80 core
| -rw-r--r-- | z80.cpu | 43 |
1 files changed, 40 insertions, 3 deletions
@@ -666,13 +666,50 @@ fd 11100001 pop_iy cycles 1 mov sp scratch2 ocall write_8 - add 1 sp wz - mov wz scratch1 + add 1 sp scratch1 ocall read_8 xchg h scratch1 cycles 2 - mov wz scratch2 + add 1 sp scratch2 + ocall write_8 + lsl h 8 wz + or l wz wz + +dd 11100011 ex_sp_ix + mov sp scratch1 + ocall read_8 + mov scratch1 wz + mov ix scratch1 + cycles 1 + mov sp scratch2 + ocall write_8 + add 1 sp scratch1 + ocall read_8 + lsl scratch1 8 scratch1 + or scratch1 wz wz + lsr ix 8 scratch1 + cycles 2 + add 1 sp scratch2 + ocall write_8 + mov wz ix + +fd 11100011 ex_sp_iy + mov sp scratch1 + ocall read_8 + mov scratch1 wz + mov iy scratch1 + cycles 1 + mov sp scratch2 + ocall write_8 + add 1 sp scratch1 + ocall read_8 + lsl scratch1 8 scratch1 + or scratch1 wz wz + lsr iy 8 scratch1 + cycles 2 + add 1 sp scratch2 ocall write_8 + mov wz iy 10000RRR add_reg add a main.R a |