Mercurial > repos > blastem
changeset 1731:366b65d91614
Implemented DD/FD prefixes for EX in new Z80 core
author | Michael Pavone <pavone@retrodev.com> |
---|---|
date | Sat, 02 Feb 2019 20:43:20 -0800 |
parents | 71f7827ff30a |
children | 3b286be82ea5 |
files | z80.cpu |
diffstat | 1 files changed, 40 insertions(+), 3 deletions(-) [+] |
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line diff
--- a/z80.cpu Sat Feb 02 16:16:25 2019 -0800 +++ b/z80.cpu Sat Feb 02 20:43:20 2019 -0800 @@ -666,13 +666,50 @@ 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