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port 61 xors bit 4 on and off during reads

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1451
This commit is contained in:
Sjoerd van der Berg 2003-11-18 22:32:13 +00:00
parent 27fd691fff
commit b91359610a
1 changed files with 1 additions and 0 deletions
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src/hardware/keyboard.cpp
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@ -197,6 +197,7 @@ static void write_p60(Bit32u port,Bit8u val) {
static Bit8u read_p61(Bit32u port) {
port_61_data^=0x20;
port_61_data^=0x10;
return port_61_data;
}