diff --git a/src/mame/drivers/segas16b.c b/src/mame/drivers/segas16b.c
index 1cb203c63b2..8d92ff48c81 100644
--- a/src/mame/drivers/segas16b.c
+++ b/src/mame/drivers/segas16b.c
@@ -2569,7 +2569,14 @@ static INPUT_PORTS_START( passshtj )
 	PORT_DIPSETTING(    0x00, DEF_STR( Hardest ) )
 INPUT_PORTS_END
 
+static INPUT_PORTS_START( cencourt )
+	PORT_INCLUDE( passshtj )
 
+	PORT_MODIFY("DSW2")
+	PORT_DIPNAME( 0x01, 0x01, "Debug Display" ) PORT_DIPLOCATION("SW2:1") // test mode still calls it Demo Sounds like other sets, but instead it enables a debug overlay here
+	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
+	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
+INPUT_PORTS_END
 
 static INPUT_PORTS_START( riotcity )
 	PORT_INCLUDE( system16b_generic )
@@ -5468,6 +5475,51 @@ ROM_START( passshtj )
 	ROM_LOAD( "epr-11861.a11", 0x40000, 0x08000, CRC(38b54a71) SHA1(68ec4ef5b115844214ff2213be1ce6678904fbd2) )
 ROM_END
 
+//*************************************************************************************************************************
+//  Center Court, Sega System 16B
+//  CPU: 68000
+//  ROM Board No. 171-5358
+//
+// prototype board, checksums handwritten on prg roms, EPR stickers present on other roms, but handwritten locations 
+// instead of numbers
+//
+// uses encrypted MC8123 for sound
+
+
+ROM_START( cencourt )
+	ROM_REGION( 0x20000, "maincpu", 0 ) // 68000 code
+	ROM_LOAD16_BYTE( "a4_56f6.bin", 0x000000, 0x10000, CRC(7116dce6) SHA1(058faf5f1980f811e2e1d5f7d09660ff51b0c0dc) )
+	ROM_LOAD16_BYTE( "a1_478b.bin", 0x000001, 0x10000, CRC(37beb770) SHA1(694a7f7977226997e06a198b311b355505e45b0b) )
+
+	ROM_REGION( 0x30000, "gfx1", 0 ) // tiles
+	ROM_LOAD( "epr-b-9.bin",  0x00000, 0x10000, CRC(9a55cd88) SHA1(4a6cf4aa5dde8d50148381aee8c141c98bb86fe8) )
+	ROM_LOAD( "epr-b-10.bin", 0x10000, 0x10000, CRC(fc13ca35) SHA1(3dc9d7c7f28d5605c6ce93243c79f63839aec8f4) )
+	ROM_LOAD( "epr-b-11.bin", 0x20000, 0x10000, CRC(1503c203) SHA1(95e9634bdcfd8027c1b0a47fa87736180ec39b08) )
+
+	ROM_REGION16_BE( 0x80000, "sprites", 0 ) // sprites
+	ROM_LOAD16_BYTE( "epr-b-1.bin",  0x00001, 0x10000, CRC(b18bfccf) SHA1(7bce8da08849f5d0f580a2cdc905f0094c83fe13) )
+	ROM_LOAD16_BYTE( "epr-b-5.bin",  0x00000, 0x10000, CRC(3481a8e8) SHA1(13b972af6d4bc3d47258b3ff810e091f3b98a02b) )
+	ROM_LOAD16_BYTE( "epr-b-2.bin",  0x20001, 0x10000, CRC(61a996c0) SHA1(22fb91c1a0102a10b68133051c593eef8ac5748f) )
+	ROM_LOAD16_BYTE( "epr-b-6.bin",  0x20000, 0x10000, CRC(2116bcb1) SHA1(b5fee6b2dca5e51ff1e4d4466ca0802bef662bc4) )
+	ROM_LOAD16_BYTE( "epr-b-3.bin",  0x40001, 0x10000, CRC(69a2e109) SHA1(2a3c4af711c5cf02deaac5236c8088cdadcd85cd) )
+	ROM_LOAD16_BYTE( "epr-b-7.bin",  0x40000, 0x10000, CRC(ccf6b09f) SHA1(d8173b189356245a6b7bdec370829e8580b13c93) )
+	ROM_LOAD16_BYTE( "epr-b-4.bin",  0x60001, 0x10000, CRC(bdf63cd2) SHA1(2a7af7046d66a9542d8ae9fce93a6088a8ff0938) )
+	ROM_LOAD16_BYTE( "epr-b-8.bin",  0x60000, 0x10000, CRC(88a90641) SHA1(15c127a3cbf86807f181cb87967ce8825102b645) )
+
+	ROM_REGION( 0x50000, "soundcpu", 0 ) // sound CPU
+	ROM_LOAD( "epr-a-7.bin",  0x00000, 0x08000, CRC(9e1b81c6) SHA1(fde901dad473c0b3fd3c153f0739998a67ed05d6) ) // encrypted
+	ROM_LOAD( "epr-a-8.bin",  0x10000, 0x08000, CRC(08ab0018) SHA1(0685f80a7d403208c9cfffea3f2035324f3924fe) ) // == epr-11858.a8
+	ROM_LOAD( "epr-a-9.bin",  0x20000, 0x08000, CRC(8673e01b) SHA1(e79183ab30e683fdf61ced2e9dbe010567c324cb) ) // == epr-11859.a9
+	ROM_LOAD( "epr-a-10.bin", 0x30000, 0x08000, CRC(10263746) SHA1(1f981fb185c6a9795208ecdcfba36cf892a99ed5) ) // == epr-11860.a10
+	ROM_LOAD( "epr-a-11.bin", 0x40000, 0x08000, CRC(38b54a71) SHA1(68ec4ef5b115844214ff2213be1ce6678904fbd2) ) // == epr-11861.a11
+
+	ROM_LOAD( "epr-11857.a7",  0x00000, 0x08000, CRC(789edc06) SHA1(8c89c94e503513c287807d187de78a7fbd75a7cf) ) // temporary (from parent until above is decrypted)
+
+	ROM_REGION( 0x2000, "mcu", 0 ) // MC8123 key
+	ROM_LOAD( "cencourt_mc8123.key",  0x0000, 0x2000, NO_DUMP)
+ROM_END
+
+
 
 //*************************************************************************************************************************
 //*************************************************************************************************************************
@@ -6788,6 +6840,7 @@ GAME( 1989, mvpj,       mvp,      system16b_fd1094,     mvp,     segas16b_state,
 GAME( 1988, passsht,    0,        system16b_fd1094,    passsht,  segas16b_state,generic_5358,       ROT270, "Sega", "Passing Shot (World, 2 Players, FD1094 317-0080)", 0 )
 GAME( 1988, passshta,   passsht,  system16b_fd1094,    passshtj, segas16b_state,passshtj_5358,      ROT270, "Sega", "Passing Shot (World, 4 Players, FD1094 317-0074)", 0 )
 GAME( 1988, passshtj,   passsht,  system16b_fd1094,    passshtj, segas16b_state,passshtj_5358,      ROT270, "Sega", "Passing Shot (Japan, 4 Players, FD1094 317-0070)", 0 )
+GAME( 1988, cencourt,   passsht,  system16b,           cencourt, segas16b_state,passshtj_5358,      ROT270, "Sega", "Center Court (prototype, MC-8123B)", 0 )
 
 GAME( 1991, riotcity,   0,        system16b,           riotcity, segas16b_state,generic_5704,       ROT0,   "Sega / Westone", "Riot City (Japan)", 0 )
 
diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index b216aca9d7d..c79963bb230 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -4552,6 +4552,7 @@ mvpj            // (c) 1989 (FD1094, decrypted)
 passsht         // (c) 1988 (FD1094, decrypted)
 passshta        // (c) 1988 (FD1094, decrypted)
 passshtj        // (c) 1988 (FD1094, decrypted)
+cencourt		// (c) 1988 (MC-8123B)
 riotcity        // (c) 1991 Sega / Westone (Unprotected)
 ryukyu          // (c) 1990 (FD1094, decrypted)
 sdib            // (c) 1987 (FD1089A, decrypted)