From 6e54ab76fcfffb8b1efc7d9209ece4f938ba5306 Mon Sep 17 00:00:00 2001 From: Patrick Mackinlay Date: Mon, 23 May 2022 11:12:00 +0700 Subject: [PATCH] z80: bug fix for 16-bit operands --- src/devices/cpu/z80/z80.cpp | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/devices/cpu/z80/z80.cpp b/src/devices/cpu/z80/z80.cpp index 86a65ed3169..a43fec45327 100644 --- a/src/devices/cpu/z80/z80.cpp +++ b/src/devices/cpu/z80/z80.cpp @@ -555,7 +555,9 @@ uint8_t z80_device::arg() uint16_t z80_device::arg16() { - return arg() | (arg() << 8); + u8 const res = arg(); + + return (u16(arg()) << 8) | res; } /***************************************************************