diff options
author | AJR <ajrhacker@users.noreply.github.com> | 2018-05-20 10:03:30 -0400 |
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committer | AJR <ajrhacker@users.noreply.github.com> | 2018-05-20 10:03:30 -0400 |
commit | ba6e4cdae04d1d33244faf618dda459d00530c45 (patch) | |
tree | e40bb04af69af66a18e08b2f162c3342ea03d9a0 | |
parent | 603ae89155e0bace1f7ba00de48332ef452265e9 (diff) |
cit101: Performance hack and note (nw)
-rw-r--r-- | src/mame/drivers/cit101.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/mame/drivers/cit101.cpp b/src/mame/drivers/cit101.cpp index 96ccac0ef98..7eab898268e 100644 --- a/src/mame/drivers/cit101.cpp +++ b/src/mame/drivers/cit101.cpp @@ -379,9 +379,11 @@ MACHINE_CONFIG_START(cit101_state::cit101) MCFG_DEVICE_ADD("pit0", PIT8253, 0) MCFG_PIT8253_CLK0(6.144_MHz_XTAL / 4) MCFG_PIT8253_CLK1(6.144_MHz_XTAL / 4) - MCFG_PIT8253_CLK2(6.144_MHz_XTAL / 4) + //MCFG_PIT8253_CLK2(6.144_MHz_XTAL / 4) MCFG_PIT8253_OUT0_HANDLER(WRITELINE("auxuart", i8251_device, write_txc)) MCFG_PIT8253_OUT1_HANDLER(WRITELINE("auxuart", i8251_device, write_rxc)) + // OUT2 might be used for an internal expansion similar to the VT100 STP. + // The output appears to be fixed to a 307.2 kHz rate; turning this off boosts driver performance. MCFG_DEVICE_ADD("pit1", PIT8253, 0) MCFG_PIT8253_CLK0(6.144_MHz_XTAL / 4) |