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z80scc: Fix vector modification in high bits

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This commit is contained in:
Dirk Best 2020-10-02 14:34:47 +02:00
parent bb64dd17bc
commit 2908f3b1cd
1 changed files with 1 additions and 0 deletions
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src/devices/machine/z80scc.cpp
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@ -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 // Modify vector according to Hi/lo bit of WR9
if (m_wr9 & WR9_BIT_SHSL) // Affect V4-V6 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 &= 0x8f;
vec |= src << 4; vec |= src << 4;
} }