ACER, INC. ACERMATE 486/G (A1GX) Device Type Mainboard Processor 80486/80486WB/CX486DX2/IBM486DX2/AM486DX2/AM486DX4/ P24T Processor 25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz Speed Chip Set ALI M1429 Video Chip Cirrus Logic Set Maximum 36MB Onboard Memory Maximum 2MB Video Memory Cache 128/256KB BIOS Unidentified Dimensions 285mm x 220mm I/O Options Floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, riser slot [Image] CONNECTIONS Purpose Location Purpose Location Chassis fan power C1 PS/2 mouse port CN5 Feature connector C2 Floppy drive interface CN6 VGA port CN1 IDE interface 2 CN7 Parallel port CN2 IDE interface 1 CN8 Serial port 2 CN3 VGA feature connector CN9 Serial port 1 CN4 Riser slot SL1 USER CONFIGURABLE SETTINGS Function Label Position » Factory configured - do not J1 Unidentified alter » Factory configured - do not J2 Unidentified alter » Factory configured - do not J3 Unidentified alter » BIOS type select Acer JP1 Pins 2 & 3 closed BIOS type select OEM JP1 Pins 1 & 2 closed » Password disabled JP2 Pins 2 & 3 closed Password enabled JP2 Pins 1 & 2 closed » Normal boot enabled JP3 Pins 2 & 3 closed COM1 boot enabled JP3 Pins 1 & 2 closed » On board I/O enabled JP6 Pins 2 & 3 closed On board I/O disabled JP6 Pins 1 & 2 closed » On board video enabled JP9 Pins 2 & 3 closed On board video disabled JP9 Pins 1 & 2 closed » IDE address select 074H, 078H, JP10 Pins 2 & 3 closed 07CH IDE address select 0F4H, 0F8H, JP10 Pins 1 & 2 closed 0FCH » Factory configured - do not JP11 Unidentified alter » Factory configured - do not JP12 Unidentified alter » Factory configured - do not JP19 Unidentified alter » Reset button enabled JP28 Pins 2 & 3 closed Reset/green PC button enabled JP28 Pins 1 & 2 closed » IDE interface enabled JP29 Pins 2 & 3 closed IDE interface disabled JP29 Pins 1 & 2 closed » BIOS type select EPROM JPX1 Pins 2 & 3 closed BIOS type select flash JPX1 Pins 1 & 2 closed SIMM CONFIGURATION Size Bank 0 Bank 1 Bank 2 4MB 4MB None None 4MB None (1) 1M x 36 None 8MB 4MB (1) 1M x 36 None 8MB None (1) 2M x 36 None 8MB None (1) 1M x 36 (1) 1M x 36 12MB 4MB (1) 2M x 36 None SIMM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 12MB 4MB (1) 1M x 36 (1) 1M x 36 12MB None (1) 1M x 36 (1) 2M x 36 16MB 4MB (1) 2M x 36 (1) 1M x 36 16MB None (1) 4M x 36 None 16MB None (1) 2M x 36 (1) 2M x 36 20MB 4MB (1) 4M x 36 None 20MB None (1) 1M x 36 (1) 4M x 36 24MB 4MB (1) 1M x 36 (1) 4M x 36 24MB None (1) 2M x 36 (1) 4M x 36 28MB 4MB (1) 2M x 36 (1) 4M x 36 32MB None (1) 4M x 36 (1) 4M x 36 36MB 4MB (1) 4M x 36 (1) 4M x 36 SIMM JUMPER CONFIGURATION Size JP4 JP5 » On board 4MB enabled Pins 1 & 2 closed Pins 2 & 3 closed On board 8MB enabled Pins 2 & 3 closed Pins 1 & 2 closed On board memory Pins 1 & 2 closed Pins 1 & 2 closed disabled 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 CACHE JUMPER CONFIGURATION Size JP30 JP31 128KB Pins 1 & 2 closed Pins 1 & 2 closed 256KB Pins 2 & 3 closed Pins 2 & 3 closed VIDEO MEMORY CONFIGURATION Size Bank 0 Bank 1 Bank 2 512KB (1) 256K x 16 None None 1MB (1) 256K x 16 (1) 256K x 16 None 2MB (1) 256K x 16 (1) 256K x 16 (2) 256K x 16 CPU TYPE SELECTION Type JP13 JP14 JP15 JP17 JP18 80486 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 80486WB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 CX486DX2 * 2 & 3 Open 1 & 2 1 & 2 2 & 3 IBM486DX2 * 2 & 3 Open 1 & 2 1 & 2 2 & 3 CX486DX2 2 & 3 Open 1 & 2 1 & 2 2 & 3 IBM486DX2 2 & 3 Open 1 & 2 1 & 2 2 & 3 AM486DX2 2 & 3 1 & 2 1 & 2 2 & 3 1 & 2 AM486DX2(WB) 2 & 3 1 & 2 1 & 2 2 & 3 1 & 2 AM 486DX4 2 & 3 1 & 2 1 & 2 2 & 3 1 & 2 P24T 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 Note: Pins designated should be in the closed position. * = 3.3v, 3.45v CPU. CPU TYPE SELECTION (CON’T) Type JP19 JP20 JP21 JP22 JP23 80486 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 80486WB 1 & 2 2 & 3 2 & 3 1 & 2 2 & 3 CX486DX2 * 2 & 3 1 & 2 1 & 2 2 & 3 1 & 2 IBM486DX2 * 2 & 3 1 & 2 1 & 2 2 & 3 1 & 2 CX486DX2 2 & 3 1 & 2 1 & 2 2 & 3 1 & 2 IBM486DX2 2 & 3 1 & 2 1 & 2 2 & 3 1 & 2 AM486DX2 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 AM486DX2(WB) 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 AM 486DX4 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 P24T 1 & 2 2 & 3 2 & 3 1 & 2 2 & 3 Note: Pins designated should be in the closed position. * = 3.3v, 3.45v CPU. CPU TYPE SELECTION (CON’T) Type JP25 JP26 JP27 JP32 JPX2 JPX3 80486 2 & 3 2 & 3 3 & 4 1 & 2 2 & 3 2 & 3 80486WB 2 & 3 1 & 2 3 & 4 1 & 2 2 & 3 2 & 3 CX486DX2 * 1 & 2 2 & 3 2 & 3 1 & 2 2 & 3 2 & 3 IBM486DX2 * 1 & 2 2 & 3 2 & 3 1 & 2 2 & 3 2 & 3 CX486DX2 1 & 2 2 & 3 3 & 4 1 & 2 2 & 3 2 & 3 IBM486DX2 1 & 2 2 & 3 3 & 4 1 & 2 2 & 3 2 & 3 AM486DX2 1 & 2 2 & 3 3 & 4 1 & 2 2 & 3 2 & 3 AM486DX2(WB) 1 & 2 2 & 3 2 & 3 1 & 2 2 & 3 2 & 3 AM 486DX4 1 & 2 2 & 3 3 & 4 1 & 2 2 & 3 2 & 3 P24T 2 & 3 1 & 2 3 & 4 1 & 2 2 & 3 2 & 3 Note: Pins designated should be in the closed position. * = 3.3v, 3.45v CPU. DMA CHANNEL SELECTION Channel JP7 JP8 1 Pins 1 & 2 closed Pins 1 & 2 closed » 3 Pins 2 & 3 closed Pins 2 & 3 closed