diff --git a/src/emu/machine/eeprom.c b/src/emu/machine/eeprom.c
index e8a6a7f16a9..35009981126 100644
--- a/src/emu/machine/eeprom.c
+++ b/src/emu/machine/eeprom.c
@@ -86,10 +86,11 @@ eeprom_base_device::eeprom_base_device(const machine_config &mconfig, device_typ
 		m_default_value_set(false),
 		m_completion_time(attotime::zero)
 {
-	m_operation_time[WRITE_TIME] 		= attotime::from_msec(2);
-	m_operation_time[WRITE_ALL_TIME] 	= attotime::from_msec(8);
-	m_operation_time[ERASE_TIME] 		= attotime::from_msec(1);
-	m_operation_time[ERASE_ALL_TIME] 	= attotime::from_msec(8);
+	// a 2ms write time is too long for rfjetsa
+	m_operation_time[WRITE_TIME] 		= attotime::from_usec(1750);
+	m_operation_time[WRITE_ALL_TIME] 	= attotime::from_usec(8000);
+	m_operation_time[ERASE_TIME] 		= attotime::from_usec(1000);
+	m_operation_time[ERASE_ALL_TIME] 	= attotime::from_usec(8000);
 }
 
 
diff --git a/src/emu/machine/eepromser.c b/src/emu/machine/eepromser.c
index 0ed369d0301..a1180e49f4d 100644
--- a/src/emu/machine/eepromser.c
+++ b/src/emu/machine/eepromser.c
@@ -119,6 +119,13 @@
 		93Cxx has ERASE command; this maps to WRITE on ER5911
 		93Cxx has WRITEALL command; no equivalent on ER5911
 
+****************************************************************************
+
+	Issues with:
+	
+	kickgoal.c - code seems wrong, clock logic writes 0-0-0 instead of 0-1-0 as expected
+	overdriv.c - drops CS, raises CS, keeps DI=1, triggering extraneous start bit
+	
 ***************************************************************************/
 
 #include "emu.h"
diff --git a/src/mame/drivers/plygonet.c b/src/mame/drivers/plygonet.c
index e0f63ad0ae5..486d37da9af 100644
--- a/src/mame/drivers/plygonet.c
+++ b/src/mame/drivers/plygonet.c
@@ -656,7 +656,7 @@ static MACHINE_CONFIG_START( plygonet, polygonet_state )
 
 	MCFG_QUANTUM_PERFECT_CPU("maincpu") /* TODO: TEMPORARY!  UNTIL A MORE LOCALIZED SYNC CAN BE MADE */
 
-	MCFG_EEPROM_SERIAL_93C66_ADD("eeprom")
+	MCFG_EEPROM_SERIAL_93C66_8BIT_ADD("eeprom")
 
 	MCFG_GFXDECODE(plygonet)
 
diff --git a/src/mame/drivers/tecmosys.c b/src/mame/drivers/tecmosys.c
index b14c0e88506..9140bef31f5 100644
--- a/src/mame/drivers/tecmosys.c
+++ b/src/mame/drivers/tecmosys.c
@@ -457,6 +457,7 @@ static MACHINE_CONFIG_START( deroon, tecmosys_state )
 	MCFG_GFXDECODE(tecmosys)
 
 	MCFG_EEPROM_SERIAL_93C46_ADD("eeprom")
+	MCFG_EEPROM_SERIAL_ENABLE_STREAMING()
 
 	MCFG_VIDEO_ATTRIBUTES(VIDEO_UPDATE_AFTER_VBLANK)
 
diff --git a/src/mame/drivers/tmmjprd.c b/src/mame/drivers/tmmjprd.c
index ec984c76b76..c2b00c0fa4d 100644
--- a/src/mame/drivers/tmmjprd.c
+++ b/src/mame/drivers/tmmjprd.c
@@ -754,6 +754,7 @@ static MACHINE_CONFIG_START( tmmjprd, tmmjprd_state )
 	MCFG_TIMER_DRIVER_ADD_SCANLINE("scantimer", tmmjprd_state, tmmjprd_scanline, "lscreen", 0, 1)
 
 	MCFG_EEPROM_SERIAL_93C46_ADD("eeprom")
+	MCFG_EEPROM_SERIAL_ENABLE_STREAMING()
 
 	MCFG_GFXDECODE(tmmjprd)
 
diff --git a/src/mame/drivers/vamphalf.c b/src/mame/drivers/vamphalf.c
index a040b865780..33688171f28 100644
--- a/src/mame/drivers/vamphalf.c
+++ b/src/mame/drivers/vamphalf.c
@@ -983,6 +983,8 @@ static MACHINE_CONFIG_START( common, vamphalf_state )
 	MCFG_CPU_VBLANK_INT_DRIVER("screen", vamphalf_state,  irq1_line_hold)
 
 	MCFG_EEPROM_SERIAL_93C46_ADD("eeprom")
+	MCFG_EEPROM_ERASE_TIME(attotime::from_usec(250))	// coolmini requires fast erase
+	MCFG_EEPROM_WRITE_TIME(attotime::from_usec(250))	// dtfamily requires fast write
 
 	/* video hardware */
 	MCFG_SCREEN_ADD("screen", RASTER)