ACER, INC. 486 SYSTEM (V20) Processor AM486SX/(SL)AM486SX/80486SX/AM486DX/(SL)AM486DX/80486DX/CX486DX2/AM486DX2(SL)AM486DX2/80486DX2/AM486DX4/ (SL)AM486DX4/80486DX4/P24D/P24T Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set Unidentified Video Chip None Set Maximum 64MB Onboard Memory Maximum None Video Memory Cache 128/256/512KB BIOS Unidentified Dimensions 330mm x 218mm I/O 32-bit VESA local bus slot, 32-bit PCI slots (3), floppy drive interface, green PC connector, IDE Options interfaces (2), parallel port, PS/2 mouse port, serial ports (2) NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location Serial port 1 CN1 Reset switch/green PC CN9 pins 7 & connector 8 Serial port 2 CN2 Power LED & keylock CN10 pins 1 - 5 Parallel port CN3 Speaker CN10 pins 7 - 10 Floppy drive CN4 Turbo LED CN10 pins 12 interface & 13 IDE interface 1 CN5 Turbo switch CN10 pins 15 - 17 IDE interface 2 CN6 Reset switch CN10 pins 19 & 20 PS/2 mouse port CN7 32-bit PCI slots PC1 - PC3 IDE interface CN8 32-bit VESA local bus SL1 LED slots Power LED & CN9 pins 1 - keylock 4 USER CONFIGURABLE SETTINGS Function Label Position » Password disabled JP1 Pins 2 & 3 closed Password enabled JP1 Pins 1 & 2 closed » OEM BIOS enabled JP2 Pins 2 & 3 closed » Factory configured - do not JP2 Pins 1 & 2 closed alter » M5115 I/O enabled JP8 Pins 1 & 2 closed M5115 I/O disabled JP8 Pins 2 & 3 closed Jumper information unidentified JP10 Unidentified » Local bus IDE I/O address JP11 Pins 1 & 2 closed select 0FXH Local bus IDE I/O address JP11 Pins 2 & 3 closed select 07XH » M5213N local bus IDE enabled JP12 Pins 2 & 3 closed M5213N local bus IDE disabled JP12 Pins 1 & 2 closed » Reset key enabled JP23 Pins 1 & 2 closed Reset key disabled JP23 Pins 2 & 3 closed » Green PC connector enabled JP24 Pins 2 & 3 closed Reset switch enabled JP24 Pins 1 & 2 closed » Factory configured - do not JP41 Pins 2 & 3 closed alter DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 4MB None None None (1) 1M x 36 8MB (1) 2M x 36 None None None 8MB None None (1) 1M x 36 (1) 1M x 36 8MB None None (1) 2M x 36 None 12MB (1) 2M x 36 None (1) 1M x 36 None 12MB (1) 2M x 36 None None (1) 1M x 36 12MB None (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 12MB (1) 1M x 36 None (1) 2M x 36 None 12MB None (1) 1M x 36 (1) 2M x 36 None 16MB (1) 2M x 36 None (1) 2M x 36 None 16MB (1) 2M x 36 None (1) 1M x 36 (1) 1M x 36 DRAM 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 16MB None None None (1) 4M x 36 16MB (1) 1M x 36 (1) 1M x 36 (1) 2M x 36 None 24MB (1) 2M x 36 None (1) 4M x 36 None 24MB (1) 2M x 36 None None (1) 4M x 36 24MB (1) 4M x 36 None (1) 2M x 36 None 24MB None (1) 4M x 36 (1) 2M x 36 None 28MB (1) 2M x 36 None (1) 4M x 36 (1) 1M x 36 28MB (1) 2M x 36 None (1) 1M x 36 (1) 4M x 36 28MB (1) 4M x 36 (1) 1M x 36 (1) 2M x 36 None 28MB (1) 1M x 36 (1) 4M x 36 (1) 2M x 36 None 32MB None None (1) 4M x 36 (1) 4M x 36 40MB (1) 2M x 36 None (1) 4M x 36 (1) 4M x 36 40MB (1) 4M x 36 (1) 4M x 36 (1) 2M x 36 None 48MB None (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 None (1) 32K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 512KB (4) 128K x 8 None (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP13 JP15 JP16 128KB Pins 2 & 3 Pins 2 & 3 Pins 1 & 2 closed closed closed 256KB Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 closed closed closed 512KB Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed CPU SPEED SELECTION Speed JP17 JP21 25MHz Pins 1 & 5 closed Pins 2 & 3 closed 33MHz Pins 2 & 6 closed Pins 2 & 3 closed 40MHz Pins 3 & 7 closed Pins 1 & 2 closed 50iMHz Pins 1 & 5 closed Pins 2 & 3 closed 50MHz Pins 4 & 8 closed Pins 1 & 2 closed 66iMHz Pins 2 & 6 closed Pins 2 & 3 closed 75iMHz Pins 1 & 5 closed Pins 2 & 3 closed 100iMHz Pins 2 & 6 closed Pins 2 & 3 closed CPU TYPE SELECTION Type JP9 JP20 JP26 JP27 AM486SX Pins 2 & 3 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed closed (SL)AM486SX Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed closed 80486SX Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 Pins 2 & 3 closed closed closed closed AM486DX Pins 2 & 3 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed closed (SL)AM486DX Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed closed 80486DX Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 Pins 2 & 3 closed closed closed closed CX486DX2 Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 Open closed closed closed AM486DX2 Pins 2 & 3 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed closed (SL)AM486DX2 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed closed 80486DX2 Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 Pins 2 & 3 closed closed closed closed AM486DX4 Pins 2 & 3 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed closed (SL)AM486DX4 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed closed 80486DX4 Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 Pins 2 & 3 closed closed closed closed P24D Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed P24T Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed CPU TYPE SELECTION (CON’T) Type JP33 JP34 JP35 JP37 AM486SX Pins 1 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed (SL)AM486SX Pins 1 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed 80486SX Pins 1 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed AM486DX Pins 1 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed (SL)AM486DX Pins 1 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed 80486DX Pins 1 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed CX486DX2 Pins 2 & 4 Pins 1 & 2 Pins 2 & 3 Pins 1 & 2 closed closed closed closed AM486DX2 Pins 1 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed (SL)AM486DX2 Pins 1 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed 80486DX2 Pins 1 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed AM486DX4 Pins 1 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed (SL)AM486DX4 Pins 1 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed 80486DX4 Pins 1 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed P24D Pins 1 & 3 Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 closed closed closed closed P24T Pins 1 & 3 Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 closed closed closed closed CPU MULTIPLIER SELECTION (80486DX4 ONLY) » Multiplier JP22 » 2x Pins 3 & 4 closed » 2.5x Pins 2 & 3 closed » 3x Pins 1 & 2 closed