OPTI-495 SX CACHE Motherboard Settings and Configuration

ARTEK COMPUTER SYSTEMS, INC.

OPTI-495 SX CACHE

Processor
80386DX/80486SX/80487SX/80486DX/80486DX2
Processor Speed
25/33/40/50(internal)/50/66(internal)MHz
Chip Set
OPTI
Max. Onboard DRAM
32MB
SRAM Cache
64/128/256KB
BIOS
AMI
Dimensions
235mm x 220mm
I/O Options
None
NPU Options
80387

CONNECTIONS
Purpose
Location
Purpose
Location
Reset switch
J1
Speaker
J4
Turbo switch
J2
Power LED & keylock
J5
Turbo LED
J3
External battery
J7

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
CMOS memory normal operation
P1
pins 2 & 3 closed

CMOS memory clear
P1
pins 1 & 2 closed
»
Monitor type select color
P2
closed

Monitor type select monochrome
P2
open
»
Factory configured - do not alter
P28
open
»
Factory configured - do not alter
P39
open

DRAM CONFIGURATION
Size
Bank 0
Bank 1
1MB
(4) 256K x 9
NONE
2MB
(4) 256K x 9
(4) 256K x 9
4MB
(4) 1M x 9
NONE
5MB
(4) 1M x 9
(4) 256K x 9
8MB
(4) 1M x 9
(4) 1M x 9
16MB
(4) 4M x 9
NONE
20MB
(4) 1M x 9
(4) 4M x 9
32MB
(4) 4M x 9
(4) 4M x 9

SRAM CONFIGURATION
Size
Cache
Location
TAG
64KB
(8) 8K x 8
Banks 0 & 1
(1) 8K x 8
128KB
(4) 32K x 8
Bank 0
(1) 8K x 8
256KB
(8) 32K x 8
Banks 0 & 1
(1) 32K x 8

SRAM JUMPER CONFIGURATION
Size
P3
P5
P6
P7
P8
P9
64KB
pins 2 & 3 closed
open
open
open
open
open
128KB
pins 1 & 2 closed
closed
closed
closed
closed
closed
256KB
pins 2 & 3 closed
closed
closed
closed
closed
closed

CPU CONFIGURATION
CPU
P4
P25
P33
P100
80486 (PGA)
pins 2 & 3 closed
pins 1 & 2 closed
closed
pins 2 & 3 closed
80386 (PQFP)
pins 1 & 2 closed
pins 2 & 3 closed
open
pins 1 & 2 closed

80486 CPU CONFIGURATION
CPU
P12
P13
P14
80486DX/80486DX2
pins 1 & 2 closed
pins 1 & 2 closed
closed
80487SX
pins 1 & 2 closed
pins 2 & 3 closed
closed
80487SX
pins 2 & 3 closed
pins 2 & 3 closed
open

CPU SPEED CONFIGURATION
Speed
CPU
P30
P31
P32
P97
66iMHz
80486
closed
open
closed
closed
50MHz
80486
closed
closed
open
closed
50iMHz
80486
open
closed
open
open
40MHz
80386
open
open
closed
closed
33MHz
80486
closed
closed
open
open
33MHz
80386
closed
closed
open
closed
25MHz
80486
closed
open
closed
open

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Processor	80386DX/80486SX/80487SX/80486DX/80486DX2
Processor Speed	25/33/40/50(internal)/50/66(internal)MHz
Chip Set	OPTI
Max. Onboard DRAM	32MB
SRAM Cache	64/128/256KB
BIOS	AMI
Dimensions	235mm x 220mm
I/O Options	None
NPU Options	80387

CONNECTIONS
Purpose	Location	Purpose	Location
Reset switch	J1	Speaker	J4
Turbo switch	J2	Power LED & keylock	J5
Turbo LED	J3	External battery	J7

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	P1	pins 2 & 3 closed
	CMOS memory clear	P1	pins 1 & 2 closed
»	Monitor type select color	P2	closed
	Monitor type select monochrome	P2	open
»	Factory configured - do not alter	P28	open
»	Factory configured - do not alter	P39	open

DRAM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(4) 256K x 9	NONE
2MB	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	NONE
5MB	(4) 1M x 9	(4) 256K x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
20MB	(4) 1M x 9	(4) 4M x 9
32MB	(4) 4M x 9	(4) 4M x 9

SRAM CONFIGURATION
Size	Cache	Location	TAG
64KB	(8) 8K x 8	Banks 0 & 1	(1) 8K x 8
128KB	(4) 32K x 8	Bank 0	(1) 8K x 8
256KB	(8) 32K x 8	Banks 0 & 1	(1) 32K x 8

SRAM JUMPER CONFIGURATION
Size	P3	P5	P6	P7	P8	P9
64KB	pins 2 & 3 closed	open	open	open	open	open
128KB	pins 1 & 2 closed	closed	closed	closed	closed	closed
256KB	pins 2 & 3 closed	closed	closed	closed	closed	closed

CPU CONFIGURATION
CPU	P4	P25	P33	P100
80486 (PGA)	pins 2 & 3 closed	pins 1 & 2 closed	closed	pins 2 & 3 closed
80386 (PQFP)	pins 1 & 2 closed	pins 2 & 3 closed	open	pins 1 & 2 closed

80486 CPU CONFIGURATION
CPU	P12	P13	P14
80486DX/80486DX2	pins 1 & 2 closed	pins 1 & 2 closed	closed
80487SX	pins 1 & 2 closed	pins 2 & 3 closed	closed
80487SX	pins 2 & 3 closed	pins 2 & 3 closed	open

CPU SPEED CONFIGURATION
Speed	CPU	P30	P31	P32	P97
66iMHz	80486	closed	open	closed	closed
50MHz	80486	closed	closed	open	closed
50iMHz	80486	open	closed	open	open
40MHz	80386	open	open	closed	closed
33MHz	80486	closed	closed	open	open
33MHz	80386	closed	closed	open	closed
25MHz	80486	closed	open	closed	open