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i8251: "reset" bit is only documented to revert to looking for a mode byte, not reset the entire chip. [R. Belmont]

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R. Belmont 2012-05-09 22:32:12 +00:00
parent a3a85159ee
commit 570c01f9ac
1 changed files with 4 additions and 1 deletions
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5
src/emu/machine/i8251.c
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@ -625,7 +625,10 @@ WRITE8_MEMBER(i8251_device::control_w)
if (data & (1<<6))
{
reset();
// datasheet says "returns to mode format", not
// completely resets the chip. behavior of DEC Rainbow
// backs this up.
m_flags |= I8251_EXPECTING_MODE;
}
update_rx_ready();