| Name | Description | Year | Manufacturer | Rom | Clone | Sample |
| mastcrane | Master Crane (set 1) | 199? | Compumatic | | | |
| mastcranea | Master Crane (set 2) | 199? | Compumatic | mastcrane | mastcrane | |
| mastcraneb | Master Crane (set 3) | 199? | Compumatic | mastcrane | mastcrane | |
| master | Master (Chess King) | 1983 | Chess King / Intelligent Software | | | |
| masterw | Master of Weapon (World) | 1989 | Taito Corporation Japan | | | |
| masterwj | Master of Weapon (Japan) | 1989 | Taito Corporation | masterw | masterw | |
| masterwu | Master of Weapon (US) | 1989 | Taito America Corporation | masterw | masterw | |
| mastfury | Master's Fury | 1996 | Unico | | | |
| mastkin | The Masters of Kin | 1988 | Du Tech | | | |
| mastmind | Electronic Master Mind (Invicta) | 1979 | Invicta | | | |
| mastninj | Master Ninja (bootleg of Shadow Warriors / Ninja Gaiden) | 1989 | bootleg | shadoww | shadoww | |
| mastrglf | Master's Golf | 1985 | Nasco | | | |
| mat286 | MAT286 Rev.D | 19?? | <unknown> | ibm5170 | ibm5170 | |
| matahari | Mata Hari | 1978 | Bally | | | genpin |
| match98 | Match '98 (ver. 1.33) | 1998 | Amcoe | | | |
| matchem | Match'em Up (6221-51, U5-1) | 1986 | Merit | | | |
| matchemg | Match'em Up (6221-55, U5-1, German) | 1986 | Merit | matchem | matchem | |
| matchit | Match It | 1989 | Tamtex | | | |
| matchit2 | Match It II | 1993 | Tamtex | | | |
| matchitb | Match It (bootleg) | 1989 | bootleg | matchit | matchit | |
| matchme | Match Me | 1980 | Kingsford | | | |
| matchnum | Match Number | 1979 | A-One LSI | | | |
| mathbox | Atari MATHBOX | | | | | |
| mathmagi | Mathemagician | 1980 | APF Electronics Inc. | | | |
| mathmarv | Math Marvel | 1980 | Texas Instruments | | | |
| mathsmag | Les Maths Magiques (France) | 1982 | Texas Instruments | | | |
| matmania | Mat Mania | 1985 | Technos Japan (Taito America license) | | | |
| mato | Mato | 1985 | Statny | pmd851 | pmd851 | |
| matrim | Matrimelee / Shin Gouketsuji Ichizoku Toukon (NGM-2660 ~ NGH-2660) | 2003 | Noise Factory / Atlus | neogeo | | |
| matrimbl | Matrimelee / Shin Gouketsuji Ichizoku Toukon (bootleg) | 2003 | bootleg | matrim | matrim | |
| matrix | Matrix | 200? | <unknown> | | | |
| matrox_vga | Matrox MGA2064W VGA i/f | | | | | |
| mattelcs | Mattel Classic Sports | 2005 | Mattel | | | |
| mausuke | Mausuke no Ojama the World (J 960314 V1.000) | 1996 | Data East Corporation | stvbios | | |
| mav_100 | Maverick, The Movie (1.00) | 1994 | Data East | mav_402 | mav_402 | genpin |
| mav_200 | Maverick, The Movie (2.00) | 1994 | Data East | mav_402 | mav_402 | genpin |
| mav_400 | Maverick, The Movie (Display Rev. 4.00) | 1994 | Sega | mav_402 | mav_402 | genpin |
| mav_401 | Maverick, The Movie (4.02, Display Rev. 4.01) | 1994 | Sega | mav_402 | mav_402 | genpin |
| mav_402 | Maverick, The Movie (4.04, Display Rev. 4.02) | 1994 | Sega | | | genpin |
| maverik | Maverik | 198? | <unknown> | | | |
| max10in1 | Vs Maxx 10-in-1 Casino / Senario Card & Casino Games | 200? | Senario / JungleTac | | | |
| max80 | MAX-80 | 1982 | Lobo Systems | | | |
| maxaflex | Max-A-Flex | 1984 | Exidy | | | |
| maxf_102 | Maximum Force v1.02 | 1996 | Atari Games | maxforce | maxforce | |
| maxf_ng | Maximum Force (No Gore version) | 1996 | Atari Games | maxforce | maxforce | |
| maxflash_128kb | Atari 8-bit Atarimax Maxflash 128K flash ROM cart | | | | | |
| maxflash_1mb | Atari 8-bit Atarimax Maxflash 1MB flash ROM cart | | | | | |
| maxforce | Maximum Force v1.05 | 1996 | Atari Games | | | |
| maxidbl | Maxi Double Poker (Ver. 1.10) | 1992 | Blitz Systems Inc. | | | |
| maxideal | Maxi-Dealer | 1983 | ACL Manufacturing | | | |
| maxidpkr | Maxi Double Poker (version 1.8) | 1990 | Blitz System | | | |
| maxrpm | Max RPM (ver 2) | 1986 | Bally Midway | | | |
| maxspeed | Maximum Speed | 2003 | SIMS / Sammy | awbios | | |
| maxx5in1 | Vs Maxx 5-in-1 Casino / Senario Card & Casino Games | 200? | Senario / JungleTac | | | |
| maxx6in1 | Vs Maxx 6-in-1 Casino / Senario Card & Casino Games | 200? | Senario / JungleTac | | | |
| maxxi | Maxxi | 1982 | Polymax | apple2 | apple2 | |
| maya | Maya (set 1) | 1994 | Promat | | | |
| mayaa | Maya (set 2) | 1994 | Promat | maya | maya | |
| mayab | Maya (set 3) | 1994 | Promat | maya | maya | |
| mayac | Maya (set 4, clean) | 1994 | Promat | maya | maya | |
| mayday | Mayday (set 1) | 1980 | Hoei | | | |
| maydaya | Mayday (set 2) | 1980 | Hoei | mayday | mayday | |
| maydayb | Mayday (set 3) | 1980 | Hoei | mayday | mayday | |
| mayhem | Mayhem 2002 | 1985 | Cinematronics | | | |
| mayjin3 | Mayjinsen 3 | 2000 | Seta / Able Corporation | aleck64 | | |
| mayjinsn | Mayjinsen | 1994 | Seta | | | |
| mayjisn2 | Mayjinsen 2 | 1994 | Seta | | | |
| mayumi | Kiki-Ippatsu Mayumi-chan | 1988 | Victory L.L.C. | | | |
| mazan | Mazan: Flash of the Blade (World, MAZ2 Ver.A) | 2002 | Namco | naomi | | |
| mazanj | Mazan: Flash of the Blade (Japan, MAZ1 Ver.A) | 2002 | Namco | mazan | mazan | |
| mazanu | Mazan: Flash of the Blade (US, MAZ3 Ver.A) | 2002 | Namco | mazan | mazan | |
| maze | Amazing Maze | 1976 | Midway | | | |
| mazebl | Maze (Trog rev LA4 3/11/91 bootleg) | 1990 | bootleg | trog | trog | |
| mazeinv | Maze Invaders (prototype) | 1981 | Atari | | | |
| mazerbla | Mazer Blazer (set 1) | 1983 | Stern Electronics | | | |
| mazerblaa | Mazer Blazer (set 2) | 1983 | Stern Electronics | mazerbla | mazerbla | |
| mazinger | Mazinger Z (World) | 1994 | Banpresto / Dynamic Pl. Toei Animation | | | |
| mazingerj | Mazinger Z (Japan) | 1994 | Banpresto / Dynamic Pl. Toei Animation | mazinger | mazinger | |
| mb_10 | Monster Bash (1.0) | 1998 | Williams | | | |
| mb_106 | Monster Bash (1.06) | 1998 | Williams | mb_10 | mb_10 | |
| mb_106b | Monster Bash (1.06b) | 1998 | Williams | mb_10 | mb_10 | |
| mb_vcu | Mazer Blazer custom VCU | | | | | |
| mb1212c | MB-1212C | 199? | Biostar | ibm5170 | ibm5170 | |
| mb133340 | MB-1340UCQ-B | 199? | Biostar | ibm5170 | ibm5170 | |
| mb14241 | MB14241 Data Shifter | | | | | |
| mb1433aeap | MB-1433/50 AEA-P - V:1 | 199? | Biostar | ibm5170 | ibm5170 | |
| mb1433ucv | MB-1433UCV | 199? | Biostar | ibm5170 | ibm5170 | |
| mb1433uiv | MB-1433UIV | 199? | Biostar | ibm5170 | ibm5170 | |
| mb3773 | MB3773 Power Supply Monitor | | | | | |
| mb4d33 | MB-4D33/50NR | 199? | Aquarius System (ASI) | ibm5170 | ibm5170 | |
| mb60553 | MB60553 Zooming Tilemap | | | | | |
| mb62h195 | Roland MB62H195 I/O | | | | | |
| mb63h114 | Roland MB63H114 Multiple Address Counter | | | | | |
| mb63h130 | Roland MB63H130 Key Assigner | | | | | |
| mb63h149 | Roland MB63H149 Key Assigner | | | | | |
| mb63h158 | Kawai MB63H158 Touch Sensor | | | | | |
| mb8421 | Fujitsu MB8421 8-bit Dual-Port SRAM with Interrupts | | | | | |
| mb8421_mb8431_16 | Fujitsu MB8421/MB8431 16-bit Dual-Port SRAM with Interrupts | | | | | |
| mb8433uud | MB8433-UUD-A | 199? | Biostar | ibm5170 | ibm5170 | |
| mb86233 | Fujitsu MB86233 (TGP) | | | | | |
| mb86234 | Fujitsu MB86234 (TGP) | | | | | |
| mb86235 | Fujitsu MB86235 "TGPx4" | | | | | |
| mb86292 | Fujitsu MB86292 "Orchid" Graphics Controller | | | | | |
| mb86930 | Fujitsu MB86930 'SPARClite' | | | | | |
| mb87013 | Roland MB87013 QDC | | | | | |
| mb87030 | Fujitsu MB87030 SCSI controller | | | | | |
| mb87078 | MB87078 Volume Controller | | | | | |
| mb87419_mb87420 | Roland LP MB87419/MB87420 PCM | | | | | |
| mb8795 | Fujitsu MB8795 | | | | | |
| mb88201 | Fujitsu MB88201 | | | | | |
| mb88202 | Fujitsu MB88202 | | | | | |
| mb88303 | Fujitsu MB88303 | | | | | |
| mb8841 | Fujitsu MB8841 | | | | | |
| mb8842 | Fujitsu MB8842 | | | | | |
| mb8843 | Fujitsu MB8843 | | | | | |
| mb8844 | Fujitsu MB8844 | | | | | |
| mb8866 | Fujitsu MB8866 FDC | | | | | |
| mb8876 | Fujitsu MB8876 FDC | | | | | |
| mb8877 | Fujitsu MB8877 FDC | | | | | |
| mb8884 | Fujitsu MB8884 | | | | | |
| mb89351 | Fujitsu MB89351 SCSI controller | | | | | |
| mb89352 | Fujitsu MB89352 SCSI controller | | | | | |
| mb89363b | Fujitsu MB89363B I/O | | | | | |
| mb89371 | MB89371 Dual Serial UART | | | | | |
| mb89374 | MB89374 Data Link Controller | | | | | |
| mb90082 | Fujitsu MB90082 OSD | | | | | |
| mb90610a | Fujitsu MB90610A | | | | | |
| mb90611a | Fujitsu MB90611A | | | | | |
| mb90641a | Fujitsu MB90641A | | | | | |
| mb90f574 | Fujitsu MB90F574 | | | | | |
| mb91f155a | Fujitsu MB91F155A | | | | | |
| mba009 | HLB-286 MBA-009 | 199? | <unknown> | ibm5170 | ibm5170 | |
| mba029 | MBA-029 | 199? | Mitac | ibm5170 | ibm5170 | |
| mba032q | MBA-032Q TK83305-4N-D-03 | 199? | DTK | ibm5170 | ibm5170 | |
| mbaa | Melty Blood Actress Again Version A (Japan, Rev A) | 2008 | Type-Moon / Ecole | naomi | | |
| mbaao | Melty Blood Actress Again (Japan) | 2008 | Type-Moon / Ecole | mbaa | mbaa | |
| mbaseb | Baseball (Mattel) | 1978 | Mattel Electronics | | | |
| mbaskb | Basketball (Mattel) | 1978 | Mattel Electronics | | | |
| mbaskb2 | Basketball 2 (Mattel) | 1979 | Mattel Electronics | | | |
| mbboard | Mephisto Buttons Board | | | | | |
| mbc020 | MBC020-65 CPU/Video Board (Torque Systems OEM) | 1983 | Sym Systems / Torque Systems | | | |
| mbc16 | MBC-16 | 198? | Sanyo | ibm5150 | ibm5150 | |
| mbc16lt | MBC-16LT | 198? | Sanyo | ibm5150 | ibm5150 | |
| mbc18nb | MBC-18NB | 199? | Sanyo | ibm5170 | ibm5170 | |
| mbc200 | MBC-200 | 1982 | Sanyo | | | |
| mbc28 | MBC-28 | 1992 | Sanyo | ibm5170 | ibm5170 | |
| mbc55x | MBC-55x | 1983 | Sanyo | | | |
| mbc55x_kbd | MBC-55x Keyboard | | | | | |
| mbdtower | Dark Tower (Milton Bradley) | 1981 | Milton Bradley | | | |
| mbee | Microbee 16k Standard | 1982 | Applied Technology | | | |
| mbee128 | Microbee 128k Standard | 1984 | Applied Technology | mbee | mbee | |
| mbee128p | Microbee 128k Premium | 1986 | Microbee Systems | mbee | mbee | |
| mbee256 | Microbee 256TC | 1987 | Microbee Systems | mbee | mbee | |
| mbee56 | Microbee 64k | 1983 | Applied Technology | mbee | mbee | |
| mbeeic | Microbee 32k IC | 1983 | Applied Technology | mbee | mbee | |
| mbeepc | Microbee 32k Communicator | 1984 | Applied Technology | mbee | mbee | |
| mbeepc85 | Microbee PC85 | 1985 | Applied Technology | mbee | mbee | |
| mbeepc85b | Microbee PC85 (New version) | 1985 | Microbee Systems | mbee | mbee | |
| mbeepc85s | Microbee PC85 (Swedish) | 1985 | Applied Technology | mbee | mbee | |
| mbeepp | Microbee Premium Plus+ | 2012 | Microbee Systems | mbee | mbee | |
| mbeeppc | Microbee Premium PC85 | 1986 | Microbee Systems | mbee | mbee | |
| mbeett | Microbee Teleterm | 1986 | Microbee Systems | mbee | mbee | |
| mbh1 | MB-H1 (MSX1, Japan) | 1983 | Hitachi | | | |
| mbh1e | MB-H1E (MSX1, Japan) | 1984 | Hitachi | mbh1 | mbh1 | |
| mbh2 | MB-H2 (MSX1, Japan) | 1984 | Hitachi | | | |
| mbh25 | MB-H25 (MSX1, Japan) | 1988 | Hitachi | | | |
| mbh3 | MB-H3 (MSX2, Japan) | 1985 | Hitachi | | | |
| mbh50 | MB-H50 (MSX1, Japan) | 1986 | Hitachi | | | |
| mbh70 | MB-H70 (MSX2, Japan) | 1986 | Hitachi | | | |
| mbm29dl164bd | Fujitsu MBM29DL164BD Flash | | | | | |
| mbm29f016a | Fujitsu MBM29F016A Flash | | | | | |
| mbm29f160te | Fujitsu MBM29F160TE Flash | | | | | |
| mbm29f160te_16bit | Fujitsu MBM29F160TE Flash (16-bit) | | | | | |
| mbm29lv002tc | Fujitsu MBM29LV002TC Flash | | | | | |
| mbm29lv800b | Fujitsu MBM29LV800B Flash | | | | | |
| mbomberj | Muscle Bomber: The Body Explosion (Japan 930713) | 1993 | Capcom | slammast | slammast | |
| mbombrd | Muscle Bomber Duo: Ultimate Team Battle (World 931206) | 1993 | Capcom | | | |
| mbombrdj | Muscle Bomber Duo: Heat Up Warriors (Japan 931206) | 1993 | Capcom | mbombrd | mbombrd | |
| mbossy | Mike Bossy | 1982 | Game Plan | | | genpin |
| mbrush | Magic Brush (bootleg of Crush Roller) | 1981 | bootleg (Olympia) | crush | crush | |
| mbs1 | MB-S1 | 1984 | Hitachi | | | |
| mbs1_mmu | Hitachi MB-S1 MMU | | | | | |
| mbs2euro | Mega Bonus Star II (Euro, Millennium Edition) | 2002 | Auto-Data Graz | | | |
| mbutrfly | Magical Butterfly (version U350C, protected) | 1999 | Bordun International | | | |
| mc_105te | 2011 Super HiK 105 in 1 Turbo Edition | 200? | <unknown> | | | |
| mc_110cb | 110 in 1 CoolBaby (CoolBoy RS-1S) | 200? | CoolBoy | | | |
| mc_138cb | 138 in 1 CoolBaby (CoolBoy RS-5, PCB060-10009011V1.3) | 200? | CoolBoy | | | |
| mc_7x6ss | 777777 in 1 (8 bit Slim Station, NEWPXP-DVT22-A PCB) | 200? | <unknown> | | | |
| mc_89in1 | 89 in 1 Mini Game Console (060-92023011V1.0) | 201? | <unknown> | | | |
| mc_8x6cb | 888888 in 1 (Coolboy AEF-390) | 200? | CoolBoy | | | |
| mc_8x6ss | 888888 in 1 (8 bit Slim Station, NEWPXP-DVT22-A PCB) | 200? | <unknown> | | | |
| mc_9x6sa | 999999 in 1 (8 bit Slim Station, NEWPXP-DVT22-A PCB) | 200? | <unknown> | mc_9x6ss | mc_9x6ss | |
| mc_9x6ss | 999999 in 1 (PXP2 Slim Station) | 200? | <unknown> | | | |
| mc_aa2 | 100 in 1 Arcade Action II (AT-103) | 200? | <unknown> | | | |
| mc_cb203 | Coolboy RS-17 - 203 in 1 | 201? | Coolboy | | | |
| mc_cb280 | Coolboy RS-18 (280 in 1) | 201? | CoolBoy | | | |
| mc_dcat8 | 100 in 1 (D-CAT8 8bit Console, set 1) (v5.01.11-frd, BL 20041217) | 2004 | <unknown> | | | |
| mc_dcat8a | 100 in 1 (D-CAT8 8bit Console, set 2) | 2004 | <unknown> | mc_dcat8 | mc_dcat8 | |
| mc_dg101 | dreamGEAR 101 in 1 | 200? | dreamGEAR | | | |
| mc_dgear | dreamGEAR 75-in-1 | 200? | dreamGEAR | | | |
| mc_hh210 | Handheld 210 in 1 | 201? | <unknown> | | | |
| mc_sam60 | Samuri (60 in 1) | 200? | Hummer Technology Co., Ltd. | | | |
| mc_sp69 | Sports Game 69 in 1 | 200? | <unknown> | | | |
| mc_tv200 | 200 in 1 Retro TV Game | 201? | Thumbs Up | | | |
| mc10 | MC-10 | 1983 | Tandy Radio Shack | | | |
| mc10_multiports_ext | Fred_72 and 6502man's Multiports Extension | | | | | |
| mc1000 | MC-1000 | 1985 | CCE | | | |
| mc10cart_slot | MC-10 Cartridge Slot | | | | | |
| mc10pak | MC-10 Program PAK | | | | | |
| mc10pakram | Radio Shack 16K RAM Cartridge | | | | | |
| mc1200 | MC-1200 | 1980 | Milwaukee Computers | | | |
| mc1408 | MC1408 DAC | | | | | |
| mc14411 | MC14411 Bit Rate Generator | | | | | |
| mc146818 | MC146818 RTC | | | | | |
| mc1502 | Elektronika MS 1502 | 1989 | NPO Microprocessor | | | |
| mc1502_fdc | MC-1502 floppy | | | | | |
| mc1502_rom | MC-1502 ROM cart | | | | | |
| mc1702 | Elektronika MC-1702 | 1990 | <unknown> | ibm5150 | ibm5150 | |
| mc300 | MC-300 Micro Composer | 1988 | Roland | | | |
| mc3408 | MC3408 DAC | | | | | |
| mc3410 | MC3410 DAC | | | | | |
| mc3417 | MC3417 | | | | | |
| mc3418 | MC3418 | | | | | |
| mc50 | MC-50 Micro Composer | 1990 | Roland | | | |
| mc50mk2 | MC-50mkII Micro Composer | 1992 | Roland | | | |
| mc68000 | mc-68000-Computer | 1984 | mc / Franzis Verlag | | | |
| mc68000_floppy | mc-68000 Floppy Interface | | | | | |
| mc68000_ram | mc-68000 2 MB RAM Expansion | | | | | |
| mc68000_sysbus | mc-68000 System Bus | | | | | |
| mc68000_sysbus_slot | mc-68000 System Bus Slot | | | | | |
| mc6809 | Motorola MC6809 | | | | | |
| mc6809e | Motorola MC6809E | | | | | |
| mc68120 | Motorola MC68120 IPC | | | | | |
| mc68121 | Motorola MC68121 IPC | | | | | |
| mc68307 | MC68307 | | | | | |
| mc68328 | MC68328 DragonBall Processor | | | | | |
| mc68328_lcd | MC68328-compatible LCD Controller | | | | | |
| mc68340 | MC68340 | | | | | |
| mc68340duart | MC68340 DUART Device | | | | | |
| mc68340sermod | MC68340 Serial Module | | | | | |
| mc68340timmod | MC68340 Timer Module | | | | | |
| mc6843 | Motorola MC6843 FDC | | | | | |
| mc6844 | MC6844 DMA | | | | | |
| mc6845 | Motorola MC6845 CRTC | | | | | |
| mc6845_1 | Motorola MC6845-1 CRTC | | | | | |
| mc6846 | MC6846 Programmable Timer | | | | | |
| mc6847_ntsc | Motorola MC6847 VDG (NTSC) | | | | | |
| mc6847_pal | Motorola MC6847 VDG (PAL) | | | | | |
| mc6847t1_ntsc | Motorola MC6847T1 VDG (NTSC) | | | | | |
| mc6847t1_pal | Motorola MC6847T1 VDG (PAL) | | | | | |