386DX/486SX/486DX/486DX2 Motherboard Settings and Configuration

MAGITRONICS

386DX/486SX/486DX/486DX2

Processor
80386DX/80486SX/80487SX/80486DX/80486DX2
Processor Speed
25/33/40/50(internal)/50/66(internal)MHz
Chip Set
Unidentified
Max. Onboard DRAM
32MB
Cache
64/128/256KB
BIOS
AMI
Dimensions
254mm x 220mm
I/O Options
None
NPU Options
80387DX

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

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) 256K x 9
(4) 1M x 9
5MB
(4) 1M x 9
(4) 256K x 9
8MB
(4) 1M x 9
(4) 1M x 9
16MB
(4) 4M x 9
NONE
17MB
(4) 256K x 9
(4) 4M x 9
17MB
(4) 4M x 9
(4) 256K x 9
20MB
(4) 1M x 9
(4) 4M x 9
20MB
(4) 4M x 9
(4) 1M x 9
32MB
(4) 4M x 9
(4) 4M x 9

CACHE CONFIGURATION
Size
Bank 0
Bank 1
TAG
64KB
(4) 8K x 8
(4) 8K x 8
(1) 8K x 8
128KB
(4) 32K x 8
NONE
(1) 8K x 8
256KB
(4) 32K x 8
(4) 32K x 8
(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size
P3
P5
P7
P9
64KB
pins 2 & 3 closed
Open
Open
Open
128KB
pins 1 & 2 closed
Open
Closed
Closed
256KB
pins 2 & 3 closed
Closed
Closed
Closed

CPU TYPE CONFIGURATION
Type
P4
P25
P33
P100
80386 (PQFP)
pins 1 & 2 closed
pins 2 & 3 closed
Open
pins 2 & 3 closed
80486 (PQFP)
pins 2 & 3 closed
pins 1 & 2 closed
Closed
pins 1 & 2 closed
80486 (PGA)
pins 2 & 3 closed
pins 1 & 2 closed
Closed
pins 2 & 3 closed

CPU TYPE CONFIGURATION
Type
P12
P13
P14
80486SX
pins 2 & 3 closed
Open
Open
80487SX
pins 1 & 2 closed
pins 2 & 3 closed
Closed
80486DX
pins 1 & 2 closed
pins 1 & 2 closed
Closed
80486DX2
pins 1 & 2 closed
pins 1 & 2 closed
Closed

CPU SPEED CONFIGURATION
Speed
P30
P31
P32
P97
25MHz
Closed
Open
Closed
Open
33MHz
Closed
Closed
Open
Open
40MHz
Open
Open
Closed
Closed
50MHz
Closed
Open
Closed
Closed
50iMHz
Closed
Open
Closed
Open
66iMHz
Closed
Closed
Open
Open

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386DX/486SX/486DX/486DX2 Motherboard Settings and Configuration

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Processor	80386DX/80486SX/80487SX/80486DX/80486DX2
Processor Speed	25/33/40/50(internal)/50/66(internal)MHz
Chip Set	Unidentified
Max. Onboard DRAM	32MB
Cache	64/128/256KB
BIOS	AMI
Dimensions	254mm x 220mm
I/O Options	None
NPU Options	80387DX

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

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) 256K x 9	(4) 1M x 9
5MB	(4) 1M x 9	(4) 256K x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
17MB	(4) 256K x 9	(4) 4M x 9
17MB	(4) 4M x 9	(4) 256K x 9
20MB	(4) 1M x 9	(4) 4M x 9
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8
128KB	(4) 32K x 8	NONE	(1) 8K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	P3	P5	P7	P9
64KB	pins 2 & 3 closed	Open	Open	Open
128KB	pins 1 & 2 closed	Open	Closed	Closed
256KB	pins 2 & 3 closed	Closed	Closed	Closed

CPU TYPE CONFIGURATION
Type	P4	P25	P33	P100
80386 (PQFP)	pins 1 & 2 closed	pins 2 & 3 closed	Open	pins 2 & 3 closed
80486 (PQFP)	pins 2 & 3 closed	pins 1 & 2 closed	Closed	pins 1 & 2 closed
80486 (PGA)	pins 2 & 3 closed	pins 1 & 2 closed	Closed	pins 2 & 3 closed

CPU TYPE CONFIGURATION
Type	P12	P13	P14
80486SX	pins 2 & 3 closed	Open	Open
80487SX	pins 1 & 2 closed	pins 2 & 3 closed	Closed
80486DX	pins 1 & 2 closed	pins 1 & 2 closed	Closed
80486DX2	pins 1 & 2 closed	pins 1 & 2 closed	Closed

CPU SPEED CONFIGURATION
Speed	P30	P31	P32	P97
25MHz	Closed	Open	Closed	Open
33MHz	Closed	Closed	Open	Open
40MHz	Open	Open	Closed	Closed
50MHz	Closed	Open	Closed	Closed
50iMHz	Closed	Open	Closed	Open
66iMHz	Closed	Closed	Open	Open