diff --git a/src/mame/drivers/ksys573.c b/src/mame/drivers/ksys573.c
index 7f9fa5b00c9..ba463929f97 100644
--- a/src/mame/drivers/ksys573.c
+++ b/src/mame/drivers/ksys573.c
@@ -3093,13 +3093,6 @@ static MACHINE_CONFIG_DERIVED( konami573x, konami573 )
 	MCFG_X76F041_ADD( "install_eeprom" )
 MACHINE_CONFIG_END
 
-static MACHINE_CONFIG_DERIVED( konami573xzi, konami573 )
-	MCFG_X76F041_ADD( "install_eeprom" )
-	MCFG_DS2401_ADD(  "install_id" )
-	MCFG_ZS01_ADD(    "game_eeprom", "game_id" )
-	MCFG_DS2401_ADD(  "game_id" )
-MACHINE_CONFIG_END
-
 static MACHINE_CONFIG_DERIVED( konami573y, konami573 )
 	MCFG_X76F100_ADD( "install_eeprom" )
 MACHINE_CONFIG_END
@@ -3155,13 +3148,6 @@ static MACHINE_CONFIG_DERIVED( pccard1x, pccard1 )
 	MCFG_X76F041_ADD( "install_eeprom" )
 MACHINE_CONFIG_END
 
-static MACHINE_CONFIG_DERIVED( pccard1xzi, pccard1 )
-	MCFG_X76F041_ADD( "install_eeprom" )
-	MCFG_DS2401_ADD(  "install_id" )
-	MCFG_ZS01_ADD(    "game_eeprom", "game_id" )
-	MCFG_DS2401_ADD(  "game_id" )
-MACHINE_CONFIG_END
-
 static MACHINE_CONFIG_DERIVED( pccard1xi, pccard1 )
 	MCFG_X76F041_ADD( "install_eeprom" )
 	MCFG_DS2401_ADD(  "install_id" )
@@ -3172,11 +3158,6 @@ static MACHINE_CONFIG_DERIVED( pccard1yi, pccard1 )
 	MCFG_DS2401_ADD(  "install_id" )
 MACHINE_CONFIG_END
 
-static MACHINE_CONFIG_DERIVED( pccard1zi, pccard1 )
-	MCFG_ZS01_ADD(    "install_eeprom", "install_id" )
-	MCFG_DS2401_ADD(  "install_id" )
-MACHINE_CONFIG_END
-
 static MACHINE_CONFIG_DERIVED( pccard1dxzi, pccard1d )
 	MCFG_X76F041_ADD( "install_eeprom" )
 	MCFG_DS2401_ADD(  "install_id" )