M TECHNOLOGY, INC.
R558 MUSTANG-ULTRA
| Device Type | Mainboard | 
| Processor | CX 6X86/IBM 6X86/CX 6X86L/IBM 6X86L/CX 686MX/IBM 6X86MX/ AM K5/AM K6/Pentium/Pentium MMX | 
| Processor Speed | 90/100/120/133/150/166/180/200/233/266MHz | 
| Chip Set | SIS | 
| Video Chip Set | Unidentified | 
| Maximum Onboard Memory | 384MB (EDO & SDRAM supported) Unified Memory Architecture (UMA) | 
| Cache | 512KB | 
| BIOS | Award | 
| Dimensions | 304mm x 220mm | 
| I/O Options | 32-bit PCI slots (4), floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA interface, IR connector, USB connectors (2), ATX power connector | 
| NPU Options | None | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| ATX power connector | ATX | Serial port 1 | CN4 | 
| Power LED & keylock | C1 | VGA feature connector | CN5 | 
| Turbo switch | C2 | VGA interface | CN6 | 
| Reset switch | C3 | Floppy drive interface | CN7 | 
| Speaker | C4 | IDE interface 1 | CN8 | 
| Turbo LED | C5 | IDE interface 2 | CN9 | 
| IDE interface LED | C6 | IR connector | IR1 | 
| Soft off power supply | C7 | 32-bit PCI slots | PC1 – PC4 | 
| Serial port 2 | CN1 | USB connector 1 | USB1 | 
| Parallel port | CN2 | USB connector 2 | USB2 | 
| PS/2 mouse port | CN3 | ||
| USER CONFIGURABLE SETTINGS | |||
| Function | Label | Position | |
| » | Factory configured - do not alter | JP2 | Open | 
| » | CMOS memory normal operation | JP18 | Pins 1 & 2 closed | 
| CMOS memory clear | JP18 | Pins 2 & 3 closed | |
| On board video enabled | JP24 | Pins 2 & 3 closed | |
| On board video disabled | JP24 | Pins 1 & 2 closed | |
| SIMM CONFIGURATION | ||
| Size | Bank 0 | Bank 1 | 
| 8MB | (2) 1M x 36 | None | 
| 16MB | (2) 2M x 36 | None | 
| 16MB | (2) 1M x 36 | (2) 1M x 36 | 
| 24MB | (2) 2M x 36 | (2) 1M x 36 | 
| 32MB | (2) 4M x 36 | None | 
| 32MB | (2) 2M x 36 | (2) 2M x 36 | 
| 40MB | (2) 4M x 36 | (2) 1M x 36 | 
| 48MB | (2) 4M x 36 | (2) 2M x 36 | 
| 64MB | (2) 8M x 36 | None | 
| 64MB | (2) 4M x 36 | (2) 4M x 36 | 
| 72MB | (2) 8M x 36 | (2) 1M x 36 | 
| 80MB | (2) 8M x 36 | (2) 2M x 36 | 
| 96MB | (2) 8M x 36 | (2) 4M x 36 | 
| 128MB | (2) 8M x 36 | (2) 8M x 36 | 
| Note: Board accepts EDO memory. | ||
| DIMM CONFIGURATION | ||
| Size | Bank 0 | Bank 1 | 
| 8MB | (1) 1M x 64 | None | 
| 16MB | (1) 2M x 64 | None | 
| 16MB | (1) 1M x 64 | (1) 1M x 64 | 
| 24MB | (1) 2M x 64 | (1) 1M x 64 | 
| 32MB | (1) 4M x 64 | None | 
| 32MB | (1) 2M x 64 | (1) 2M x 64 | 
| 40MB | (1) 4M x 64 | (1) 1M x 64 | 
| 48MB | (1) 4M x 64 | (1) 2M x 64 | 
| 64MB | (1) 8M x 64 | None | 
| 64MB | (1) 4M x 64 | (1) 4M x 64 | 
| 72MB | (1) 8M x 64 | (1) 1M x 64 | 
| 80MB | (1) 8M x 64 | (1) 2M x 64 | 
| 96MB | (1) 8M x 64 | (1) 4M x 64 | 
| 128MB | (1) 8M x 64 | (1) 8M x 64 | 
| Note: Board accepts EDO & SDRAM memory. | ||
| DIMM VOLTAGE CONFIGURATION | |
| Voltage | JP1 | 
| 3.3v | Pins 5 & 6, 7 & 8 closed | 
| 5v | Pins 1 & 2, 3 & 4 closed | 
| CACHE CONFIGURATION | |
| Size | Bank 0 | 
| 512KB | (2) 64K x 32 | 
| CPU SPEED SELECTION (CX 6X86) | |||||||
| CPU speed | Clock speed | Multiplier | JP3 | JP4 | JP7 | JP8 | JP9 | 
| 133MHz | 55MHz | 2x | Open | Closed | Open | Closed | Closed | 
| 150MHz | 60MHz | 2x | Open | Closed | Open | Open | Closed | 
| 166MHz | 66MHz | 2x | Open | Closed | Open | Open | Open | 
| 200MHz | 75MHz | 2x | Open | Closed | Closed | Closed | Open | 
| CPU SPEED SELECTION (IBM 6X86) | |||||||
| CPU speed | Clock speed | Multiplier | JP3 | JP4 | JP7 | JP8 | JP9 | 
| 133MHz | 55MHz | 2x | Open | Closed | Open | Closed | Closed | 
| 150MHz | 60MHz | 2x | Open | Closed | Open | Open | Closed | 
| 166MHz | 66MHz | 2x | Open | Closed | Open | Open | Open | 
| 200MHz | 75MHz | 2x | Open | Closed | Closed | Closed | Open | 
| CPU SPEED SELECTION (CX 6X86L) | |||||||
| CPU speed | Clock speed | Multiplier | JP3 | JP4 | JP7 | JP8 | JP9 | 
| 133MHz | 55MHz | 2x | Open | Closed | Open | Closed | Closed | 
| 150MHz | 60MHz | 2x | Open | Closed | Open | Open | Closed | 
| 166MHz | 66MHz | 2x | Open | Closed | Open | Open | Open | 
| 200MHz | 75MHz | 2x | Open | Closed | Closed | Closed | Open | 
| CPU SPEED SELECTION (IBM 6X86L) | |||||||
| CPU speed | Clock speed | Multiplier | JP3 | JP4 | JP7 | JP8 | JP9 | 
| 133MHz | 55MHz | 2x | Open | Closed | Open | Closed | Closed | 
| 150MHz | 60MHz | 2x | Open | Closed | Open | Open | Closed | 
| 166MHz | 66MHz | 2x | Open | Closed | Open | Open | Open | 
| 200MHz | 75MHz | 2x | Open | Closed | Closed | Closed | Open | 
| CPU SPEED SELECTION (CX 6X86MX) | |||||||
| CPU speed | Clock speed | Multiplier | JP3 | JP4 | JP7 | JP8 | JP9 | 
| 166MHz | 60MHz | 2.5x | Closed | Closed | Open | Open | Closed | 
| 200MHz | 66MHz | 2.5x | Closed | Closed | Open | Open | Open | 
| 233MHz | 66MHz | 3x | Closed | Open | Open | Open | Open | 
| 233MHz | 75MHz | 2.5x | Closed | Closed | Closed | Closed | Open | 
| 266MHz | 66MHz | 3.5x | Open | Open | Open | Open | Open | 
| 266MHz | 75MHz | 3x | Closed | Open | Closed | Closed | Open | 
| CPU SPEED SELECTION (IBM 6X86MX) | |||||||
| CPU speed | Clock speed | Multiplier | JP3 | JP4 | JP7 | JP8 | JP9 | 
| 166MHz | 60MHz | 2.5x | Closed | Closed | Open | Open | Closed | 
| 200MHz | 66MHz | 2.5x | Closed | Closed | Open | Open | Open | 
| 233MHz | 66MHz | 3x | Closed | Open | Open | Open | Open | 
| 233MHz | 75MHz | 2.5x | Closed | Closed | Closed | Closed | Open | 
| 266MHz | 66MHz | 3.5x | Open | Open | Open | Open | Open | 
| 266MHz | 75MHz | 3x | Closed | Open | Closed | Closed | Open | 
| CPU SPEED SELECTION (AM K5) | |||||||
| CPU speed | Clock speed | Multiplier | JP3 | JP4 | JP7 | JP8 | JP9 | 
| 90MHz | 60MHz | 1.5x | Open | Open | Open | Open | Closed | 
| 100MHz | 66MHz | 1.5x | Open | Open | Open | Open | Open | 
| 166MHz | 66MHz | 2.5x | Closed | Closed | Open | Open | Open | 
| CPU SPEED SELECTION (AK K6) | |||||||
| CPU speed | Clock speed | Multiplier | JP3 | JP4 | JP7 | JP8 | JP9 | 
| 166MHz | 66MHz | 2.5x | Closed | Closed | Open | Open | Open | 
| 200MHz | 66MHz | 3x | Closed | Open | Open | Open | Open | 
| 233MHz | 66MHz | 3.5x | Open | Open | Open | Open | Open | 
| CPU SPEED SELECTION (INTEL) | |||||||
| CPU speed | Clock speed | Multiplier | JP3 | JP4 | JP7 | JP8 | JP9 | 
| 90MHz | 60MHz | 1.5x | Open | Open | Open | Open | Closed | 
| 100MHz | 66MHz | 1.5x | Open | Open | Open | Open | Open | 
| 120MHz | 60MHz | 2x | Open | Closed | Open | Open | Closed | 
| 133MHz | 66MHz | 2x | Open | Closed | Open | Open | Open | 
| 150MHz | 60MHz | 2.5x | Closed | Closed | Open | Open | Closed | 
| 166MHz | 66MHz | 2.5x | Closed | Closed | Open | Open | Open | 
| 180MHz | 60MHz | 3x | Closed | Open | Open | Open | Closed | 
| 200MHz | 66MHz | 3x | Closed | Open | Open | Open | Open | 
| CPU SPEED SELECTION (INTEL MMX) | |||||||
| CPU speed | Clock speed | Multiplier | JP3 | JP4 | JP7 | JP8 | JP9 | 
| 166MHz | 66MHz | 2.5x | Closed | Closed | Open | Open | Open | 
| 200MHz | 66MHz | 3x | Closed | Open | Open | Open | Open | 
| 233MHz | 66MHz | 3.5x | Open | Open | Open | Open | Open | 
| CPU VOLTAGE SELECTION (SINGLE) | ||
| Voltage | JP6 | JP12 | 
| 3.4v | Pins 1 & 2, 3 & 4, 5 & 6 closed | Pins 3 & 4, 5 & 6, 7 & 8 closed | 
| 3.5v | Pins 1 & 2, 3 & 4, 5 & 6 closed | Pins 1 & 2, 3 & 4, 5 & 6, 7 & 8 closed | 
| CPU VOLTAGE SELECTION (DUAL) | |||
| Voltage | V core | JP6 | JP12 | 
| 3.4v | 2.1v | Open | Pins 1 & 2 closed | 
| 3.4v | 2.8v | Open | Pins 7 & 8 closed | 
| 3.4v | 2.9v | Open | Pins 1 & 2, 7 & 8 closed | 
| 3.4v | 3.2v | Open | Pins 5 & 6, 7 & 8 closed | 
| BIOS SELECTION | ||
| Type | JP16 | JP17 | 
| 1M/12v | Pins 2 & 3 closed | Pins 2 & 3 closed | 
| 1M/5v | Pins 1 & 2 closed | Pins 1 & 2 closed |