STEP 386SX20 GATE ARRAY EV-18107C Motherboard Settings and Configuration

Processor	80386SX
Processor Speed	20MHz
Chip Set	C & T
Max. onboard DRAM	16MB
Cache	64KB
BIOS	AMI
Dimensions	355mm x 304mm
I/O Options	Floppy drive interface, IDE interface, parallel port, serial ports (2)
NPU Options	80387SX

CONNECTIONS
Purpose	Location	Purpose	Location
Parallel port	J7	Floppy drive interface	U100
IDE interface	J8	Serial port 2	U106
Speaker	JP2	Serial port 1	U107
External battery	JP9	LED connector	LED

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Cache LED disabled	J3	Closed
	Cache LED enabled	J3	Open
»	BIOS type select 27256	JP8	Open
	BIOS type select 27512	JP8	Closed
»	Floppy drive interface enabled	JP9	pins 1 & 2 closed
	Floppy drive interface disabled	JP9	pins 3 & 4 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
512KB	(2) 256K x 9	NONE
1MB	(2) 256K x 9	(2) 256K x 9
2MB	(2) 1M x 9	NONE
2.5MB	(2) 256K x 9	(2) 1M x 9
4MB	(2) 1M x 9	(2) 1M x 9
8MB	(2) 4M x 9	NONE
8.5MB	(2) 256K x 9	(2) 4M x 9
10MB	(2) 1M x 9	(2) 4M x 9
16MB	(2) 4M x 9	(2)4M x 9

ONBOARD SERIAL/PARALLEL CONFIGURATION
Port	Connector	IRQ	Address
COM1	U107	IRQ4	3F8h
COM2	U106	IRQ3	2F8h
LPT2	J7	IRQ7	378h
Note:The onboard serial & parallel port configurations are fixed and cannot be altered or disabled.