DATAEXPERT CORPORATION EXP8C49 Device Type Mainboard Processor CX486DX2/CX486DX4/CX 5X86 Processor 40/50(internal)/66(internal)/75(internal)100(internal)MHz Speed Chip Set ALI Video Chip None Set Maximum 64MB Onboard Memory Maximum None Video Memory Cache 128/256/512KB BIOS AMI Dimensions 220mm x 220mm I/O Options 32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2) [Image] CONNECTIONS Purpose Location Purpose Location Serial port 2 CN1 IDE interface LED J2 Serial port 1 CN2 Reset switch J3 Floppy drive interface CN3 Turbo switch J4 Parallel port CN4 Turbo LED J5 IDE interface 1 CN5 Power LED & keylock J6 IDE interface 2 CN6 Speaker J7 PS/2 mouse port CN7 Green PC connector JP15 External battery J1 32-bit PCI slots PC1 – PC3 USER CONFIGURABLE SETTINGS Function Label Position Battery type select external J1 Closed CMOS memory clear J1 Pins 1 & 2 closed » Factory configured - do not JP4 Unidentified alter Parallel port IRQ select IRQ7 JP9 Pins 2 & 3 closed Parallel port IRQ select IRQ5 JP9 Pins 1 & 2 closed » Factory configured - do not JP14 Unidentified alter » Factory configured - do not JP18 Unidentified alter Flash BIOS voltage select 12v JP21 Pins 2 & 3 closed Flash BIOS voltage select 5v JP21 Pins 1 & 2 closed » Factory configured - do not JP24 Unidentified alter » Factory configured - do not JP41 Unidentified alter SIMM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 4MB (1) 1M x 36 None None None 8MB (1) 2M x 36 None None None 8MB (1) 1M x 36 (1) 1M x 36 None None 12MB (1) 2M x 36 (1) 1M x 36 None None 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 None 12MB (1) 1M x 36 (1) 2M x 36 None None 16MB (1) 4M x 36 None None None 16MB (1) 2M x 36 (1) 1M x 36 (1) 1M x 36 None 16MB (1) 2M x 36 (1) 2M x 36 None None SIMM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 20MB (1) 4M x 36 (1) 1M x 36 None None 20MB (1) 2M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 20MB (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 None 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 None 24MB (1) 4M x 36 (1) 2M x 36 None None 24MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 None 28MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 32MB (1) 8M x 36 None None None 32MB (1) 4M x 36 (1) 2M x 36 (1) 2M x 36 None 32MB (1) 4M x 36 (1) 4M x 36 None None 32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 36MB (1) 8M x 36 (1) 1M x 36 None None 40MB (1) 8M x 36 (1) 1M x 36 (1) 1M x 36 None 40MB (1) 8M x 36 (1) 2M x 36 None None 40MB (1) 4M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 48MB (1) 8M x 36 (1) 2M x 36 (1) 2M x 36 None 48MB (1) 8M x 36 (1) 4M x 36 None None 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 None 56MB (1) 8M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 56MB (1) 2M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 8M x 36 (1) 4M x 36 (1) 4M x 36 None 64MB (1) 8M x 36 (1) 8M x 36 None None 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 Bank 2 TAG 128KB (A) None None (4) 32K x 8 (1) 8K x 8 128KB (B) (1) 32K x None None (1) 8K x 8 32 256KB (A) None None (4) 64K x 8 (1) 16K/32K x 8 256KB (B) (1) 32K x None (4) 32K x 8 (1) 16K/32K x 8 32 256KB (C) (1) 32K x (1) 32K x None (1) 16K/32K x 8 32 32 512KB None None (4) 128K x (1) 32K x 8 8 CACHE JUMPER CONFIGURATION Size JP17 JP20 JP37 JP42 128KB (A) Open Open Pins 1 & 2 Pins 1 & 2 closed closed 128KB (B) Open Open Pins 1 & 2 Pins 1 & 2 closed closed 256KB (A) Open Closed Pins 1 & 2 Pins 2 & 3 closed closed 256KB (B) Open Closed Pins 2 & 3 Pins 2 & 3 closed closed 256KB (C) Open Closed Pins 2 & 3 Pins 2 & 3 closed closed 512KB Closed Closed Pins 1 & 2 Pins 2 & 3 closed closed CPU SPEED SELECTION Speed JP11 JP12 JP13 JP16 40MHz Open Closed Pins 2 & 3 Open closed 40MHz Open Closed Pins 1 & 2 Closed closed 50iMHz Open Open Pins 2 & 3 Open closed 66iMHz Closed Closed Pins 2 & 3 Open closed 75iMHz Open Open Pins 2 & 3 Open closed 100iMHz Closed Closed Pins 2 & 3 Open closed Note: Either setting may be used for 40MHz. CPU TYPE SELECTION Type JP23 JP32 JP35 CX486DX2 Pins 1 & 2 Pins 2 & 3 Pins 1 & 2 closed closed closed CX486DX4 Pins 1 & 2 Pins 2 & 3 Pins 1 & 2 closed closed closed CX 5X86 Pins 1 & 2 Pins 1 & 2 Pins 2 & 4 closed closed closed CPU VOLTAGE SELECTION Voltage JP29 3.3v Pins 1 & 2 closed » 3.45v Pins 3 & 4 closed 3.6v Pins 5 & 6 closed DMA CHANNEL SELECTION Channel JP5 JP6 1 Pins 1 & 2 closed Pins 1 & 2 closed 3 Pins 2 & 3 closed Pins 2 & 3 closed INTERNAL KEYBOARD SELECTION Setting JP19 JP39 JP40 » Enabled Open Closed Closed Disabled Closed Open Open