ACER, INC. AP53 Processor Pentium Processor Speed 75/90/100/120/133/150/166MHz Chip Set Intel Video Chip Set None Maximum Onboard 512MB Memory Maximum Video Memory None Cache 256KB BIOS AMI Dimensions 250mm x 220mm I/O Options 32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Serial port 2 CN1 Speaker CN8 pins 7 - 10 Serial port 1 CN2 Turbo/green PC LED CN8 pins 12 & 13 Parallel port CN3 Turbo switch/green PC CN8 pins 15 - connector 17 Floppy drive CN4 Reset switch CN8 pins 19 & interface 20 IDE interface 2 CN5 Chassis fan power CN9 IDE interface 1 CN6 IDE interface LED CN12 PS/2 mouse CN7 32-bit PCI slots PC1 - PC4 interface Power LED & CN8 pins 1 keylock - 5 Note: If connector for CN8 is 12-pin, connect red wire to pin 11. USER CONFIGURABLE SETTINGS Function Label Position » PS/2 mouse IRQ12 enabled JP4 Closed PS/2 mouse IRQ12 disabled JP4 Open » CMOS memory normal operation JP5 Pins 1 & 2 closed CMOS memory clear JP5 Pins 2 & 3 closed » On board I/O controller enabled JP8 Pins 1 & 2 closed On board I/O controller disabled JP8 Pins 2 & 3 closed » Keyboard clock select ISA clock JP1401 Pins 1 & 2 closed Keyboard clock select 12MHz JP1401 Pins 3 & 4 clock closed DRAM CONFIGURATION Size Bank 0 Bank 1 4MB (2) 512K x 36 None 8MB (2) 1M x 36 None 8MB (2) 512K x 36 (2) 512K x 36 12MB (2) 512K x 36 (2) 1M x 36 16MB (2) 2M x 36 None 16MB (2) 1M x 36 (2) 1M x 36 20MB (2) 512K x 36 (2) 2M x 36 24MB (2) 1M x 36 (2) 2M x 36 32MB (2) 4M x 36 None 32MB (2) 2M x 36 (2) 2M x 36 36MB (2) 512K x 36 (2) 4M x 36 40MB (2) 1M x 36 (2) 4M x 36 48MB (2) 2M x 36 (2) 4M x 36 64MB (2) 8M x 36 None 64MB (2) 4M x 36 (2) 4M x 36 68MB (2) 512K x 36 (2) 8M x 36 72MB (2) 1M x 36 (2) 8M x 36 80MB (2) 2M x 36 (2) 8M x 36 96MB (2) 4M x 36 (2) 8M x 36 128MB (2) 8M x 36 (2) 8M x 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 128MB (2) 16M x 36 None 136MB (2) 1M x 36 (2) 16M x 36 144MB (2) 2M x 36 (2) 16M x 36 160MB (2) 4M x 36 (2) 16M x 36 256MB (2) 16M x 36 (2) 16M x 36 256MB (2) 32M x 36 None 264MB (2) 1M x 36 (2) 32M x 36 272MB (2) 2M x 36 (2) 32M x 36 288MB (2) 4M x 36 (2) 32M x 36 320MB (2) 8M x 36 (2) 32M x 36 384MB (2) 16M x 36 (2) 32M x 36 512MB (2) 32M x 36 (2) 32M x 36 CACHE CONFIGURATION Size Bank 0 256KB (2) 32K x 32 CPU SPEED SELECTION Speed JP1 JP10 75MHz Pins 1 & 2, 3 & 4 Pins 1 & 2, 3 & 4 closed closed 90MHz Pins 1 & 2 closed Pins 1 & 2, 3 & 4 closed 100MHz Pins 3 & 4 closed Pins 1 & 2, 3 & 4 closed 120MHz Pins 1 & 2 closed Pins 3 & 4, 5 & 6 closed 133MHz Pins 3 & 4 closed Pins 3 & 4, 5 & 6 closed 150MHz Pins 1 & 2 closed Pins 5 & 6, 7 & 8 closed 166MHz Pins 3 & 4 closed Pins 5 & 6, 7 & 8 closed CPU VOLTAGE SELECTION Voltage JP11 3.45v Pins 1 & 2 closed 3.52v Pins 3 & 4 closed DMA CHANNEL SELECTION Channel JP6 JP7 1 Pins 2 & 3 closed Pins 2 & 3 closed » 3 Pins 1 & 2 closed Pins 1 & 2 closed FLASH BIOS VOLTAGE SELECTION Voltage JP1301 JP1302 » 5v Pins 1 & 2 closed Pins 1 & 2 closed 12v Pins 2 & 3 closed Pins 1 & 2 closed