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author Dirk Best <mail@dirk-best.de>2020-10-02 14:34:47 +0200
committer Dirk Best <mail@dirk-best.de>2020-10-03 10:14:32 +0200
commit2908f3b1cdcfab3fbd105ca908d97bf0ef67eb3a (patch)
tree0ddb9d971fa0119f17a408b0f6b39058e8a2b0dc
parentbb64dd17bccfa1765a883426e562c2bd8af5c1fc (diff)
z80scc: Fix vector modification in high bits
-rw-r--r--src/devices/machine/z80scc.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/devices/machine/z80scc.cpp b/src/devices/machine/z80scc.cpp
index 0259fb5d0b0..e3a7c8a1d00 100644
--- a/src/devices/machine/z80scc.cpp
+++ b/src/devices/machine/z80scc.cpp
@@ -724,6 +724,7 @@ uint8_t z80scc_device::modify_vector(uint8_t vec, int i, uint8_t src)
// Modify vector according to Hi/lo bit of WR9
if (m_wr9 & WR9_BIT_SHSL) // Affect V4-V6
{
+ src = bitswap<4>(src, 3, 0, 1, 2); // order switched (see table above)
vec &= 0x8f;
vec |= src << 4;
}