ACER, INC.
AP53
| 
 Processor  | 
 Pentium  | 
| 
 Processor Speed  | 
 75/90/100/120/133/150/166MHz  | 
| 
 Chip Set  | 
 Intel  | 
| 
 Video Chip Set  | 
 None  | 
| 
 Maximum Onboard Memory  | 
 512MB  | 
| 
 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  | 
| 
 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 connector  | 
 CN8 pins 15 - 17  | 
| 
 Floppy drive interface  | 
 CN4  | 
 Reset switch  | 
 CN8 pins 19 & 20  | 
| 
 IDE interface 2  | 
 CN5  | 
 Chassis fan power  | 
 CN9  | 
| 
 IDE interface 1  | 
 CN6  | 
 IDE interface LED  | 
 CN12  | 
| 
 PS/2 mouse interface  | 
 CN7  | 
 32-bit PCI slots  | 
 PC1 - PC4  | 
| 
 Power LED & keylock  | 
 CN8 pins 1 - 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 clock  | 
 JP1401  | 
 Pins 3 & 4 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 closed  | 
 Pins 1 & 2, 3 & 4 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  | |