From ba6e4cdae04d1d33244faf618dda459d00530c45 Mon Sep 17 00:00:00 2001 From: AJR Date: Sun, 20 May 2018 10:03:30 -0400 Subject: cit101: Performance hack and note (nw) --- src/mame/drivers/cit101.cpp | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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) -- cgit v1.2.3