Aaeon PCM-4894 User Manual page 9

CPU: AMD 5X86-P75 (486DX5-133) SQFP
BIOS: Award 128KB FLASH BIOS
Chipset: ALI 1487/1489
Super I/O Chipset: WINBOND83877TF
nd nd
2 Level Cache: On board 128KB 2 level cache. Could be
upgraded to 512KB by factory.
RAM memory: 4MB to 128MB. Two 72-pin SIMM sockets on
board.
Enhanced IDE hard disk drive interface: Support up to two
hard disk drives. BIOS auto-detect. Supports PIO mode 4 and Bus
Master. 22 x 2 header, pitch 2.00mm with housing.
Floppy disk drive interface: Supports up to two floppy disk
drives, 5.25" (360KB and 1.2MB) and /or 3.5" (720KB, 1.44MB
and 2.88MB). 17 x 2 header, pitch 2.54mm with housing.
Multi-mode parallel port: Configured to LPT1, LPT2, LPT3 or
disabled. Supports SPP, ECP and EPP. 13 x 2 header, pitch
2.54mm with housing.
Serial ports: Three RS-232 and one RS-232/422/485 serial
ports. Ports can be configured as COM1, COM2, COM3, COM4
or disabled individually. Four 16C550 serial UARTs. 20 x 2
header, pitch 2.54mm with housing for RS-232 x 4.
Keyboard/mouse connector: 8 pin connector supports standard
PC/AT keyboard and PS/2 mouse.
Real Time Clock/Calendar: Dallas DS-12887A or equivalent,
powered by lithium battery for data retention of up to 10 years.
Chapter 1 General Information 3