ATC/UNITRON COMPUTER & COMPUTER PARTS 486SL Processor CCX486M6/X486M7/AM486SXL/AM486SX(PLUS)/80486SX/AM486DXL/ 80486DX/ 80486DX2/AM486DX4(PLUS)/80486DX4/P23S/P24D/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/100(internal)/ Speed 120(internal)MHz Chip Set SIS Max. 128MB Onboard DRAM Cache None BIOS AMI/Award Dimensions 220mm x 220mm I/O Floppy drive interface, green PC connector, IDE interface, parallel port, Options serial ports (2), VGA feature connector, VGA port, riser slot NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location VGA port CN1 Green PC connector JP59 Parallel port CN2 IDE interface LED JP60 Serial port 2 CN3 Turbo LED JP61 pins 1 & 2 Serial port 1 CN4 Turbo switch JP61 pins 3 & 4 VGA feature CN5 Reset switch JP62 connector IDE interface CN6 Speaker JP63 Floppy drive CN7 Power LED & JP64 interface keylock External battery JP16 Riser Card SL1 Green PC connector JP51 USER CONFIGURABLE SETTINGS Function Jumper Position PS/2 mouse enabled JP3 Closed PS/2 mouse disabled JP3 Open » Power good signal detect from JP4 pins 1 & 2 power supply closed Power good signal detect from JP4 pins 2 & 3 board closed » VGA BIOS enabled JP7 pins 1 & 2 closed VGA BIOS disabled JP7 pins 2 & 3 closed » Factory configured - do not JP8 N/A alter Monitor type select color JP9 Closed Monitor type select monochrome JP9 Open » On board VGA enabled JP10 pins 1 & 2 closed On board VGA disabled JP10 pins 2 & 3 closed » CMOS memory normal operation JP11 pins 1 & 2 closed CMOS memory clear JP11 pins 2 & 3 closed » ECP DRQ enabled JP12 pins 1 & 2 closed ECP DRQ disabled JP12 pins 2 & 3 closed » ECP A10 enabled JP15 pins 1 & 2 closed ECP A10 disabled JP15 pins 2 & 3 closed » Parallel port IRQ select IRQ7 JP17 pins 2 & 3 closed Parallel port IRQ select IRQ5 JP17 pins 1 & 2 closed » Serial port IRQ select IRQ4 JP18 pins 3 & 4 closed Serial port IRQ select IRQ3 JP18 pins 1 & 2 closed » Factory configured - do not JP24 N/A alter CPU voltage regulator type JP27 Closed select auto CPU voltage regulator type JP27 Open select manual » IDE interface enabled JP32 Open IDE interface disabled JP32 Closed » CPU clock = CLKIN JP47 pins 1 & 2 closed CPU clock delayed for CLKIN JP47 pins 2 & 3 closed » Internal clock select CLKIN JP50 pins 1 & 2 closed Internal clock select 1/2 CLKIN JP50 pins 2 & 3 closed » Factory configured - do not JP65 N/A alter » Factory configured - do not JV N/A alter DRAM CONFIGURATION Size Bank 0 Bank 1 1MB (1) 256K x 36 NONE 2MB (1) 256K x 36 (1) 256K x 36 2MB (1) 512K x 36 NONE 3MB (1) 512K x 36 (1) 256K x 36 3MB (1) 256K x 36 (1) 512K x 36 4MB (1) 512K x 36 (1) 512K x 36 4MB (1) 1M x 36 NONE 5MB (1) 1M x 36 (1) 256K x 36 5MB (1) 256K x 36 (1) 1M x 36 6MB (1) 1M x 36 (1) 512K x 36 6MB (1) 512K x 36 (1) 1M x 36 8MB (1) 1M x 36 (1) 1M x 36 8MB (1) 2M x 36 NONE 9MB (1) 2M x 36 (1) 256K x 36 9MB (1) 256K x 36 (1) 2M x 36 10MB (1) 2M x 36 (1) 512K x 36 10MB (1) 512K x 36 (1) 2M x 36 12MB (1) 2M x 36 (1) 1M x 36 12MB (1) 1M x 36 (1) 2M x 36 16MB (1) 2M x 36 (1) 2M x 36 16MB (1) 4M x 36 NONE 17MB (1) 4M x 36 (1) 256K x 36 17MB (1) 256K x 36 (1) 4M x 36 18MB (1) 4M x 36 (1) 512K x 36 18MB (1) 512K x 36 (1) 4M x 36 20MB (1) 4M x 36 (1) 1M x 36 20MB (1) 1M x 36 (1) 4M x 36 24MB (1) 4M x 36 (1) 2M x 36 24MB (1) 2M x 36 (1) 4M x 36 32MB (1) 4M x 36 (1) 4M x 36 32MB (1) 8M x 36 NONE 33MB (1) 8M x 36 (1) 256K x 36 33MB (1) 256K x 36 (1) 8M x 36 34MB (1) 8M x 36 (1) 512K x 36 34MB (1) 512K x 36 (1) 8M x 36 36MB (1) 8M x 36 (1) 1M x 36 36MB (1) 1M x 36 (1) 8M x 36 40MB (1) 8M x 36 (1) 2M x 36 40MB (1) 2M x 36 (1) 8M x 36 48MB (1) 8M x 36 (1) 4M x 36 48MB (1) 4M x 36 (1) 8M x 36 64MB (1) 8M x 36 (1) 8M x 36 64MB (1) 16M x 36 NONE DRAM CONFIGURATION (CON'T) Size Bank 0 Bank 1 65MB (1) 16M x 36 (1) 256K x 36 65MB (1) 256K x 36 (1) 16M x 36 66MB (1) 16M x 36 (1) 512K x 36 66MB (1) 512K x 36 (1) 16M x 36 68MB (1) 16M x 36 (1) 1M x 36 68MB (1) 1M x 36 (1) 16M x 36 72MB (1) 16M x 36 (1) 2M x 36 72MB (1) 2M x 36 (1) 16M x 36 80MB (1) 16M x 36 (1) 4M x 36 80MB (1) 4M x 36 (1) 16M x 36 96MB (1) 16M x 36 (1) 8M x 36 96MB (1) 8M x 36 (1) 16M x 36 128MB (1) 16M x 36 (1) 16M x 36 CPU TYPE CONFIGURATION Type JP19 JP20 JP21 JP22 JP23 CX486M6 N/A 2 & 3 1 & 2 2 & 3 N/A AM486SXL 1 & 2 N/A 2 & 3 2 & 3 N/A AM486SX(PLUS) 4 & 5 N/A 1 & 2 2 & 3 2 & 3 80486SX 1 & 2 N/A 1 & 2 2 & 3 N/A AM486DXL 1 & 2 N/A 2 & 3 2 & 3 N/A CX486M7 N/A 2 & 3 1 & 2 2 & 3 N/A 80486DX 1 & 2 N/A 1 & 2 2 & 3 N/A 80486DX2 1 & 2 N/A 1 & 2 2 & 3 N/A AM486DX4(PLUS) 4 & 5 N/A 1 & 2 2 & 3 2 & 3 80486DX4 1 & 2 N/A 1 & 2 2 & 3 N/A P23S 1 & 2 N/A 1 & 2 2 & 3 N/A P24D 2 & 3 1 & 2 1 & 2 1 & 2 1 & 2 P24T 1 & 2 1 & 2 1 & 2 1 & 2 N/A Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON'T) Type JP38 JP39 JP40 JP41 JP42 CX486M6 2 & 3 2 & 3 N/A 1 & 2 2 & 3 AM486SXL N/A 3 & 4 1 & 2 3 & 4 2 & 3 AM486SX(PLUS) 4 & 5 N/A N/A 2 & 3 2 & 3 80486SX 4 & 5 N/A N/A 2 & 3 2 & 3 AM486DXL N/A 3 & 4 1 & 2, 3 3 & 4 1 & 2, 3 & 4 & 4 CX486M7 2 & 3 2 & 3 3 & 4 1 & 2 1 & 2, 3 & 4 80486DX 4 & 5 N/A 3 & 4 2 & 3 1 & 2, 3 & 4 80486DX2 4 & 5 N/A 3 & 4 2 & 3 1 & 2, 3 & 4 AM486DX4(PLUS) 4 & 5 N/A 3 & 4 2 & 3 1 & 2, 3 & 4 80486DX4 4 & 5 N/A 3 & 4 2 & 3 1 & 2, 3 & 4 P23S 4 & 5 N/A 3 & 4 2 & 3 2 & 3 P24D 4 & 5 N/A 3 & 4 2 & 3 1 & 2, 3 & 4 P24T 1 & 2 1 & 2 2 & 3 2 & 3 1 & 2, 3 & 4 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON'T) Type JP43 JP44 JP45 JP46 JP48 JP49 CX486M6 N/A N/A 2 & 3 N/A N/A N/A AM486SXL N/A N/A 4 & 5 N/A N/A N/A AM486SX(PLUS) N/A N/A 3 & 4 N/A N/A N/A 80486SX N/A N/A 3 & 4 N/A 2 & 3 1 & 2 AM486DXL N/A N/A 4 & 5 N/A 1 & 2 2 & 3 CX486M7 N/A N/A 2 & 3 N/A 1 & 2 2 & 3 80486DX 2 & 3 N/A 3 & 4 N/A 2 & 3 1 & 2 80486DX2 2 & 3 N/A 3 & 4 N/A 2 & 3 1 & 2 AM486DX4(PLUS) 2 & 3 N/A 3 & 4 N/A 1 & 2 1 & 2 80486DX4 1 & 2 N/A 3 & 4 N/A 2 & 3 1 & 2 P23S N/A N/A 3 & 4 N/A N/A N/A P24D 1 & 2, N/A 1 & 2, N/A 1 & 2 1 & 2 or 2 & 3 & 4 3 P24T N/A N/A 3 & 4 1 & 2, 1 & 2 1 & 2 or 2 & 3 Note: Pins designated should be in the closed position. This board also accepts SL-series CPUs & am486dxl2, but no jumper settings are listed. CPU SPEED CONFIGURATION Speed JP37 25MHz pins 1 & 2, 5 & 6 closed 33MHz pins 1 & 2, 3 & 4 closed 40MHz pins 5 & 6 closed 50iMHz pins 1 & 2, 5 & 6 closed 50MHz pins 3 & 4 closed 66iMHz pins 1 & 2, 3 & 4 closed 75iMHz pins 1 & 2, 5 & 6 closed 80iMHz pins 5 & 6 closed 100iMHz pins 1 & 2, 3 & 4 closed 120iMHz pins 5 & 6 closed CPU VOLTAGE CONFIGURATION Voltage JP26 Auto detect Open 3.3v pins 2 & 3 closed 5v pins 1 & 2 closed DMA CONFIGURATION DMA JP13 JP14 » DMA 1 pins 2 & 3 closed pins 2 & 3 closed » DMA 3 pins 1 & 2 closed pins 1 & 2 closed FLOPPY ENHANCED MODE CONFIGURATION Setting JP28 JP29 » Enabled Closed Closed » Disabled Open Open KEYBOARD CONFIGURATION Type JP1 JP2 JP5 JP6 AT Open Open pins 2 & 3 pins 2 & 3 closed closed PS/2 Closed Closed pins 1 & 2 pins 1 & 2 closed closed MEDIA DETECT CONFIGURATION Setting JP30 JP31 » Enabled Closed Closed » Disabled Open Open MISCELLANEOUS TECHNICAL NOTE Note: The location of pin 1 is unidentified.