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-rw-r--r--src/mame/drivers/gts1.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/gts1.cpp b/src/mame/drivers/gts1.cpp
index 57f90703d9e..b200e27801b 100644
--- a/src/mame/drivers/gts1.cpp
+++ b/src/mame/drivers/gts1.cpp
@@ -129,12 +129,13 @@ static ADDRESS_MAP_START( gts1_data, AS_DATA, 8, gts1_state )
ADDRESS_MAP_END
static ADDRESS_MAP_START( gts1_io, AS_IO, 8, gts1_state )
+ AM_RANGE(0x0000, 0x00ff) AM_READ ( gts1_io_r ) AM_WRITE( gts1_io_w ) // catch undecoded I/O accesss
+
AM_RANGE(0x0020, 0x002f) AM_DEVREADWRITE ( "u4", ra17xx_device, io_r, io_w ) // (U4) solenoid
AM_RANGE(0x0030, 0x003f) AM_DEVREADWRITE ( "u3", r10696_device, io_r, io_w ) // (U3) solenoid + dips
AM_RANGE(0x0040, 0x004f) AM_DEVREADWRITE ( "u5", ra17xx_device, io_r, io_w ) // (U5) switch matrix
AM_RANGE(0x0060, 0x006f) AM_DEVREADWRITE ( "u2", r10696_device, io_r, io_w ) // (U2) NVRAM io chip
AM_RANGE(0x00d0, 0x00df) AM_DEVREADWRITE ( "u6", r10788_device, io_r, io_w ) // (U6) display chip
- AM_RANGE(0x0000, 0x00ff) AM_READ ( gts1_io_r ) AM_WRITE( gts1_io_w ) // catch undecoded I/O accesss
ADDRESS_MAP_END
static INPUT_PORTS_START( gts1_dips )