diff --git a/src/mame/drivers/isbc.cpp b/src/mame/drivers/isbc.cpp
index 7e9ec555414..df24679d7d7 100644
--- a/src/mame/drivers/isbc.cpp
+++ b/src/mame/drivers/isbc.cpp
@@ -66,6 +66,8 @@ void isbc_state::machine_reset()
 		m_centronics->write_busy(0);  // centronics_device sets busy to 1 at reset causing spurious irqs
 		m_pic_1->ir7_w(0);
 	}
+	if(m_uart8251)
+		m_uart8251->write_cts(0);
 }
 
 static ADDRESS_MAP_START(rpc86_mem, AS_PROGRAM, 16, isbc_state)
@@ -261,7 +263,10 @@ static MACHINE_CONFIG_START( rpc86, isbc_state )
 	MCFG_I8251_RXRDY_HANDLER(DEVWRITELINE("pic_0", pic8259_device, ir6_w))
 
 	/* video hardware */
-	MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, nullptr)
+	MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "terminal")
+	MCFG_RS232_RXD_HANDLER(DEVWRITELINE("uart8251", i8251_device, write_rxd))
+	//MCFG_RS232_CTS_HANDLER(DEVWRITELINE("uart8251", i8251_device, write_cts))
+	MCFG_RS232_DSR_HANDLER(DEVWRITELINE("uart8251", i8251_device, write_dsr))
 
 	MCFG_ISBX_SLOT_ADD("sbx1", 0, isbx_cards, nullptr)
 	//MCFG_ISBX_SLOT_MINTR0_CALLBACK(DEVWRITELINE("pic_0", pic8259_device, ir3_w))
@@ -348,6 +353,19 @@ ROM_START( isbc86 )
 	ROM_LOAD16_BYTE( "8612_3l.bin", 0x2000, 0x1000, CRC(17f27ad2) SHA1(c3f379ac7d67dc4a0a7a611a0bc6323b8a3d4840))
 ROM_END
 
+ROM_START( isbc8605 )
+	ROM_REGION( 0x4000, "user1", ROMREGION_ERASEFF )
+	ROM_LOAD( "i8605mon.bin", 0x0000, 0x4000, CRC(e16acb6e) SHA1(eb9a3fd21f7609d44f8052b6a0603ecbb52dc3f3))
+ROM_END
+
+ROM_START( isbc8630 )
+	ROM_REGION( 0x4000, "user1", ROMREGION_ERASEFF )
+	ROM_LOAD16_BYTE( "143780-001_isdm_for_isbc_86-30_socket_u57_i2732a.bin", 0x0000, 0x1000, CRC(db0ef880) SHA1(8ef296066d16881217618e54b410d12157f318ea))
+	ROM_LOAD16_BYTE( "143782-001_isdm_for_isbc_86-30_socket_u39_i2732a.bin", 0x0001, 0x1000, CRC(ea1ebe78) SHA1(f03b63659e8f5e96f481dbc6c2ddef1d22850ebb))
+	ROM_LOAD16_BYTE( "143781-001_isdm_for_isbc_86-30_socket_u58_i2732a.bin", 0x2000, 0x1000, CRC(93732612) SHA1(06e751d0f5ab1fe2c52fd79f6f4725ccf3379791))
+	ROM_LOAD16_BYTE( "143783-001_isdm_for_isbc_86-30_socket_u40_i2732a.bin", 0x2001, 0x1000, CRC(337102d5) SHA1(535f63d24c3948187b208ea594f979bc33579a15))
+ROM_END
+
 ROM_START( isbc286 )
 	ROM_REGION( 0x20000, "user1", ROMREGION_ERASEFF )
 	ROM_LOAD16_BYTE( "u79.bin", 0x00001, 0x10000, CRC(144182ea) SHA1(4620ca205a6ac98fe2636183eaead7c4bfaf7a72))
@@ -380,5 +398,7 @@ ROM_END
 /*    YEAR  NAME    PARENT  COMPAT   MACHINE    INPUT    INIT COMPANY   FULLNAME       FLAGS */
 COMP( 19??, rpc86,    0,       0,    rpc86,      isbc, driver_device,    0,   "Intel",   "RPC 86",MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
 COMP( 1978, isbc86,   0,       0,    isbc86,     isbc, driver_device,    0,   "Intel",   "iSBC 86/12A",MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
+COMP( 1981, isbc8605, 0,       0,    rpc86,      isbc, driver_device,    0,   "Intel",   "iSBC 86/05",MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
+COMP( 1981, isbc8630, 0,       0,    rpc86,      isbc, driver_device,    0,   "Intel",   "iSBC 86/30",MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
 COMP( 19??, isbc286,  0,       0,    isbc286,    isbc, driver_device,    0,   "Intel",   "iSBC 286",MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
-COMP( 1983, isbc2861, 0,       0,    isbc2861,    isbc, driver_device,    0,   "Intel",   "iSBC 286/10", MACHINE_NO_SOUND)
+COMP( 1983, isbc2861, 0,       0,    isbc2861,   isbc, driver_device,    0,   "Intel",   "iSBC 286/10", MACHINE_NO_SOUND)
diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index 174490de6f1..5533873ef9e 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -14787,6 +14787,8 @@ isbc286                         //
 isbc2861                        //
 isbc86                          //
 rpc86                           //
+isbc8605			//
+isbc8630			//
 
 @source:isbc8010.cpp
 isbc8010                        //