ACER, INC. ACERALTOS 900K (M11C) (IDUN), M11C (IDUN) Device Type Mainboard Processor Pentium II Processor Speed 233/266MHz Chip Set Intel 440FX Video Chip Set Unidentified Maximum Onboard Memory 512MB Maximum Video Memory 2MB Cache 256/512KB (located on Pentium II CPU) BIOS Acer Dimensions 305mm x 244mm I/O Options 32-bit PCI slots (3), Ethernet 10BaseT connector, floppy drive interface, IDE interfaces (2), SCSI-2 interface, Wide SCSI interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, USB connectors (2), ATX power connector [Image] CONNECTIONS Purpose Location Purpose Location ATX power connector ATX SCSI-2 interface CN18 5v power CN1 Floppy drive CN20 interface RDM connector CN3 Serial port 1 CN21 RDM connector CN4 Serial port 2 CN22 USB connector 1 CN5 Wide SCSI interface CN23 USB connector 2 CN5A IDE interface 1 CN24 3.3v power CN6 IDE interface LED CN25 420W power CN7 Reset, turbo LED CN26 connector keylock 250W power CN8 Speaker CN27 connector Chassis intrusion CN9 Power LED CN28 connector Thermal sensor CN10 IDE interface 2 CN29 connector Soft off power CN11 VGA feature CN30 supply connector Ethernet 10BaseT CN12 Chassis fan power FA1 connector Parallel port CN13 Chassis fan power FA2 VGA port CN13A Chassis fan power FA3 Redundant power CN14 Chassis fan power FA4 supply connector LED connector CN15 32-bit PCI slots PC1 - PC3 PS/2 mouse port CN17 Note: The location of ATX is unidentified. USER CONFIGURABLE SETTINGS Function Label Position » 420W enabled JP1 Pins 1 & 2 closed 420W disabled JP1 Pins 2 & 3 closed » Factory configured - do not JP3 Unidentified alter » BIOS type select Acer JP4 Pins 1 & 2 closed BIOS type select OEM JP4 Pins 2 & 3 closed » Password disabled JP5 Pins 2 & 3 closed Password enabled JP5 Pins 1 & 2 closed » Termination enabled JP6 Pins 1 & 2 closed Termination switchable through JP6 Pins 2 & 3 closed SCSI select utility » On board video enabled JP7 Pins 1 & 2 closed On board video disabled JP7 Pins 2 & 3 closed » Buzzer enabled JP8 Pins 1 & 2 closed Buzzer disabled JP8 Pins 2 & 3 closed » Software power down enabled JP9 Pins 2 & 3 closed General power supply enabled JP9 Pins 1 & 2 closed » Flash BIOS write protect JP12 Pins 1 & 2 closed enabled Flash BIOS write protect JP12 Pins 2 & 3 closed disabled DIMM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 16MB (1) 2M x 64 None None None 32MB (1) 2M x 64 (1) 2M x 64 None None 48MB (1) 2M x 64 (1) 2M x 64 (1) 2M x 64 None 64MB (1) 2M x 64 (1) 2M x 64 (1) 2M x 64 (1) 2M x 64 32MB (1) 4M x 64 None None None 64MB (1) 4M x 64 (1) 4M x 64 None None 96MB (1) 4M x 64 (1) 4M x 64 (1) 4M x 64 None 128MB (1) 4M x 64 (1) 4M x 64 (1) 4M x 64 (1) 4M x 64 64MB (1) 8M x 64 None None None 128MB (1) 8M x 64 (1) 8M x 64 None None 192MB (1) 8M x 64 (1) 8M x 64 (1) 8M x 64 None 256MB (1) 8M x 64 (1) 8M x 64 (1) 8M x 64 (1) 8M x 64 128MB (1) 16M x 64 None None None 256MB (1) 16M x 64 (1) 16M x 64 None None 384MB (1) 16M x 64 (1) 16M x 64 (1) 16M x 64 None 512MB (1) 16M x 64 (1) 16M x 64 (1) 16M x 64 (1) 16M x 64 CACHE CONFIGURATION Note: 256KB/512KB cache is located on the Pentium II CPU. VIDEO MEMORY CONFIGURATION Size Bank 0 Bank 1 1MB (2) 256K x 16 None 2MB (2) 256K x 16 (2) 256K x 16 CPU SPEED SELECTION CPU speed Clock speed Multiplier JP2 233MHz 66MHz 3.5x Pins 1 & 2, 4 & 5 closed 266MHz 66MHz 4x Pins 1 & 2, 4 & 5 closed FLASH BIOS SELECTION Setting JP11 » Controlled by software Pins 1 & 2 closed 5v Open 12v Pins 2 & 3 closed