diff --git a/hash/gjrstar.xml b/hash/gjrstar.xml
index 9cc935299cf07..375ac9d596f1d 100644
--- a/hash/gjrstar.xml
+++ b/hash/gjrstar.xml
@@ -11,7 +11,6 @@ license:CC0-1.0
 		<year>200?</year>
 		<publisher>Video Technology</publisher>
 		<info name="serial" value="80-10171" />
-
 		<part name="rom" interface="genius_rom">
 			<dataarea name="rom" size="0x40000">
 				<rom name="27-5883-00" size="0x40000" crc="99214bce" sha1="75294fbc411b0b39b3db4727824faf29127675af"/>
@@ -19,4 +18,45 @@ license:CC0-1.0
 		</part>
 	</software>
 
+	<!-- Russian carts for Precomputer Elektronik (Прекомпьютер Электроник), compatibility with clones from other regions is unknown -->
+
+	<software name="matematika">
+		<description>Matematika - Podarok Pervoklassniku</description> <!-- Mathematics - Gift for a First Grader -->
+		<year>????</year>
+		<publisher>Video Technology / DzhiNo</publisher> <!-- VTech / ДжиНо -->
+		<info name="serial" value="80-10126-04" /> <!-- № 4 -->
+		<info name="alt_title" value="Математика - Подарок Первокласснику"/>
+		<part name="rom" interface="genius_rom">
+			<dataarea name="rom" size="0x10000">
+				<rom name="80-10126-04.bin" size="0x10000" crc="5c0c2e30" sha1="b75119188354833695c1e9a7686ac244b474ff09"/> <!-- 27C512 inside the cart, second half empty -->
+			</dataarea>
+		</part>
+	</software>
+
+	<software name="nazagadki">
+		<description>Narodnyye Zagadki</description> <!-- Folk Riddles -->
+		<year>????</year>
+		<publisher>Video Technology / DzhiNo</publisher> <!-- VTech / ДжиНо -->
+		<info name="serial" value="80-10126-08" /> <!-- № 8 -->
+		<info name="alt_title" value="Народные Загадки"/>
+		<part name="rom" interface="genius_rom">
+			<dataarea name="rom" size="0x10000">
+				<rom name="80-10126-08.bin" size="0x10000" crc="1c667c44" sha1="32f7a33a6ae95dc9b68e215e73a8c4a203d39033"/> <!-- 27C512 inside the cart, second half empty -->
+			</dataarea>
+		</part>
+	</software>
+
+	<software name="poiskakhds">
+		<description>V Poiskakh Dukhovnykh Sokrovishch</description> <!-- In Search of Spiritual Treasures -->
+		<year>????</year>
+		<publisher>Video Technology / DzhiNo</publisher> <!-- VTech / ДжиНо -->
+		<info name="serial" value="80-10126-14" /> <!-- № 14 -->
+		<info name="alt_title" value="В Поисках Духовных Сокровищ"/>
+		<part name="rom" interface="genius_rom">
+			<dataarea name="rom" size="0x10000">
+				<rom name="80-10126-14.bin" size="0x10000" crc="87e0ba37" sha1="902d1417d1fcc26216b35d18c685bbcf5b65b96c"/> <!-- 27C512 inside the cart -->
+			</dataarea>
+		</part>
+	</software>
+
 </softwarelist>
diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index ebabcc8df9f41..f150517232313 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -45467,15 +45467,16 @@ gjrstar                         // Genius Junior Redstar (Germany)
 gjrstar2                        // Genius Junior Redstar 2 (Germany)
 gjrstar3                        // Genius Junior Redstar 3 (Germany)
 gln                             // Genius Leader Notebook
-pitagor                         // Pitagorin
 gls                             // Genius Leader Select
+pcompelr                        // Prekomputer Elektronik (Russia)
 pitagjr                         // Pitagorin Junior
+pitagor                         // Pitagorin
 scientus                        // Scientus (France, from C.Q.F.D)
 
 @source:vtech/gkidabc.cpp
+gjrprofi                        // Genius Junior Profi (Germany)
 gkidabc                         // Genius KID ABC Fan (Germany)
 miprimlec                       // Mis Primeras Lecciones (Spain)
-gjrprofi                        // Genius Junior Profi (Germany)
 
 @source:vtech/glcx.cpp
 bs9009cx                        // 1999 BrainStation 9009 CXL (Germany)
diff --git a/src/mame/vtech/geniusjr.cpp b/src/mame/vtech/geniusjr.cpp
index 77b4f48240d7e..877b78307938f 100644
--- a/src/mame/vtech/geniusjr.cpp
+++ b/src/mame/vtech/geniusjr.cpp
@@ -372,7 +372,19 @@ ROM_START( gjrstar2 )
 	ROM_LOAD( "hc05_internal.bin", 0x0000, 0x2000, NO_DUMP )
 
 	ROM_REGION( 0x40000, "extrom", 0 )
-	ROM_LOAD( "27-5740-00.u1", 0x000000, 0x40000, CRC(ff3dc3bb) SHA1(bc16dfc1e12b0008456c700c431c8df6263b671f))     // identical to 'Genius Junior Redstar'
+	ROM_LOAD( "27-5740-00.u1", 0x000000, 0x40000, CRC(ff3dc3bb) SHA1(bc16dfc1e12b0008456c700c431c8df6263b671f)) // Identical to 'Genius Junior Redstar'
+ROM_END
+
+// VTech PCB 35-10100-01
+ROM_START( pcompelr )
+	ROM_REGION( 0x2000, "maincpu", 0 )
+	ROM_LOAD( "hc05_internal.u8", 0x0000, 0x2000, NO_DUMP )
+
+	ROM_REGION( 0x2000, "speech", 0 )
+	ROM_LOAD( "speech.u7", 0x0000, 0x2000, NO_DUMP ) // Labeled "930 0AF21FK / VTECH / ©YY 04044"
+
+	ROM_REGION( 0x40000, "extrom", 0 )
+	ROM_LOAD( "27-05944-000-001.u1", 0x000000, 0x40000, CRC(5018763d) SHA1(70e1d8b8e34e0b2ab10d7ac06c2f454d1f377e77)) // Dumped as AM27C020, pin 1 connected to 32 (Vcc), as per 27c020 specs)
 ROM_END
 
 ROM_START( gjrstar3 )
@@ -420,6 +432,7 @@ COMP( 1993,  gjmovie,  0,       0,      gjmovie,  geniusjr, geniusjr_state, empt
 COMP( 199?,  pitagjr,  gjmovie, 0,      gjmovie,  geniusjr, geniusjr_state, empty_init, "VTech",   "Pitagorin Junior",                  MACHINE_IS_SKELETON )
 COMP( 1996,  gjrstar,  0,       0,      gjrstar,  geniusjr, geniusjr_state, empty_init, "VTech",   "Genius Junior Redstar (Germany)",   MACHINE_IS_SKELETON )
 COMP( 1996,  gjrstar2, gjrstar, 0,      gjrstar,  geniusjr, geniusjr_state, empty_init, "VTech",   "Genius Junior Redstar 2 (Germany)", MACHINE_IS_SKELETON )
+COMP( 1995,  pcompelr, gjrstar, 0,      gjrstar,  geniusjr, geniusjr_state, empty_init, "VTech",   "Precomputer Elektronik (Russia)",   MACHINE_IS_SKELETON ) // Прекомпьютер Электроник
 COMP( 1998,  gjrstar3, 0,       0,      gjrstar,  geniusjr, geniusjr_state, empty_init, "VTech",   "Genius Junior Redstar 3 (Germany)", MACHINE_IS_SKELETON )
 COMP( 1998,  gj5000,   0,       0,      gj5000,   geniusjr, geniusjr_state, empty_init, "VTech",   "Genius Junior 5000 (Germany)",      MACHINE_IS_SKELETON )
 COMP( 1993,  gln,      0,       0,      gln,      geniusjr, geniusjr_state, empty_init, "VTech",   "Genius Leader Notebook",            MACHINE_IS_SKELETON )