MICRO-STAR INTERNATIONAL CO., LTD.
MS-6121
| Device Type | Mainboard | 
| Processor | Pentium II | 
| Processor Speed | 233/266/300/333/350/400/450MHz | 
| Chip Set | Intel 440BX | 
| Maximum Onboard Memory | 768MB (EDO & SDRAM supported) | 
| Audio Chip Set | Yamaha | 
| Cache | 256/512KB (located on Pentium II CPU) | 
| BIOS | Award | 
| Dimensions | 207mm x 254mm | 
| I/O Options | 32-bit PCI slots (2), Ethernet 10BaseT connector, floppy drive interface, game/MIDI port, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), IR connector, USB connectors (2), ATX power connector, line in, line out, microphone in, audio in  CD-ROM, SB-link connector, wake on LAN connector | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| CPU fan power | C1 | Ethernet 10BaseT connector | CN7 | 
| Parallel port | CN1 | Microphone in | CN8 | 
| Serial port 1 | CN2 | Line in | CN9 | 
| Serial port 2 | CN3 | Line out | CN10 | 
| PS/2 mouse port | CN4 | Audio in  CD-ROM | J2 | 
| Game/MIDI port | CN5 | SB-link connector | J4 | 
| USB connector | CN6 | Temperature sensor | JSOR | 
| USER CONFIGURABLE SETTINGS | |||
| Function | Label | Position | |
| » | CMOS memory normal operation | JBAT | Pins 1 & 2 closed | 
| CMOS memory clear | JBAT | Pins 2 & 3 closed | |
| MIC terminal select 3 | JMIC | Pins 1 & 2 closed | |
| MIC terminal select 2 | JMIC | Pins 2 & 3 closed | |
| Power on mode select boot up by switch | JP2 | Closed | |
| Power on mode select immediate boot up | JP2 | Open | |
| DIMM CONFIGURATION | |||
| Size | Bank 0 | Bank 1 | Bank 2 | 
| 8MB | (1) 1M x 64 | None | None | 
| 16MB | (1) 1M x 64 | (1) 1M x 64 | None | 
| 16MB | (1) 2M x 64 | None | None | 
| 24MB | (1) 1M x 64 | (1) 1M x 64 | (1) 1M x 64 | 
| 32MB | (1) 2M x 64 | (1) 2M x 64 | None | 
| 32MB | (1) 4M x 64 | None | None | 
| 48MB | (1) 2M x 64 | (1) 2M x 64 | (1) 2M x 64 | 
| 64MB | (1) 4M x 64 | (1) 4M x 64 | None | 
| 64MB | (1) 8M x 64 | None | None | 
| 96MB | (1) 4M x 64 | (1) 4M x 64 | (1) 4M x 64 | 
| 128MB | (1) 8M x 64 | (1) 8M x 64 | None | 
| 128MB | (1) 16M x 64 | None | None | 
| 164MB | (1) 16M x 64 | (1) 1M x 64 | None | 
| 144MB | (1) 16M x 64 | (1) 1M x 64 | (1) 1M x 64 | 
| 144MB | (1) 16M x 64 | (1) 2M x 64 | None | 
| 160MB | (1) 16M x 64 | (1) 2M x 64 | (1) 2M x 64 | 
| 160MB | (1) 16M x 64 | (1) 4M x 64 | None | 
| 192MB | (1) 16M x 64 | (1) 4M x 64 | (1) 4M x 64 | 
| 192MB | (1) 16M x 64 | (1) 8M x 64 | None | 
| 192MB | (1) 8M x 64 | (1) 8M x 64 | (1) 8M x 64 | 
| 256MB | (1) 16M x 64 | (1) 8M x 64 | (1) 8M x 64 | 
| DIMM CONFIGURATION (CONT) | |||
| Size | Bank 0 | Bank 1 | Bank 2 | 
| 256MB | (1) 16M x 64 | (1) 16M x 64 | None | 
| 256MB | (1) 32M x 64 | None | None | 
| 264MB | (1) 32M x 64 | (1) 1M x 64 | None | 
| 272MB | (1) 32M x 64 | (1) 1M x 64 | (1) 1M x 64 | 
| 272MB | (1) 32M x 64 | (1) 2M x 64 | None | 
| 288MB | (1) 32M x 64 | (1) 2M x 64 | (1) 2M x 64 | 
| 288MB | (1) 32M x 64 | (1) 4M x 64 | None | 
| 320MB | (1) 32M x 64 | (1) 4M x 64 | (1) 4M x 64 | 
| 320MB | (1) 32M x 64 | (1) 8M x 64 | None | 
| 384MB | (1) 32M x 64 | (1) 8M x 64 | (1) 8M x 64 | 
| 384MB | (1) 32M x 64 | (1) 16M x 64 | None | 
| 384MB | (1) 16M x 64 | (1) 16M x 64 | (1) 16M x 64 | 
| 512MB | (1) 32M x 64 | (1) 16M x 64 | (1) 16M x 64 | 
| 512MB | (1) 32M x 64 | (1) 32M x 64 | None | 
| 768MB | (1) 32M x 64 | (1) 32M x 64 | (1) 32M x 64 | 
| Note: Board accepts SDRAM memory. | |||
| CACHE CONFIGURATION | 
| Note: 256KB/512KB cache is located on the Pentium II CPU. | 
| CPU SPEED SELECTION | ||||||
| CPU speed | Clock speed | Multiplier | SW1/1 | SW1/2 | SW1/3 | SW1/4 | 
| 200MHz | 66MHz | 3x | On | On | Off | On | 
| 233MHz | 66MHz | 3.5x | On | Off | Off | On | 
| 266MHz | 66MHz | 4x | On | On | On | Off | 
| 300MHz | 66MHz | 4.5x | On | Off | On | Off | 
| 333MHz | 66MHz | 5x | On | On | Off | Off | 
| 350MHz | 100MHz | 3.5x | On | Off | Off | On | 
| 400MHz | 100MHz | 4x | On | On | On | Off | 
| 450MHz | 100MHz | 4.5x | On | Off | On | Off | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| System fan power | C1 | Audio in  CD-ROM | J6 | 
| Chassis fan power | C2 | Audio in  CD-ROM | J7 | 
| IDE interface 1 | CN1 | Soft off power supply | JSW1 | 
| IDE interface 2 | CN2 | 32-bit PCI slots | PC1  PC2 | 
| Floppy drive interface | CN3 | Power LED & keylock | U1/pins 1  5 | 
| USB connector | CN4 | Speaker | U1/pins 7 - 10 | 
| IR connector | IR1 | IDE interface LED | U1/pins 12 & 24 | 
| Green PC LED | J1 | Turbo LED | U1/pins 14 & 15 | 
| Green PC connector | J2 | Green PC connector | U1/pins 17 & 18 | 
| Wake on modem connector | J3 | Reset switch | U1/pins 21 & 22 | 
| Chassis intrusion connector | J4 | Wake on LAN connector | WOL | 
| Note: The ATX power connector is located on the backside of the riser card. | |||
| USER CONFIGURABLE SETTINGS | |||
| Function | Label | Position | |
| » | Factory configured - do not alter | J9 | Unidentified |