80486 ASIC SYSTEM BOARD Motherboard Settings and Configuration

MICRONICS COMPUTERS, INC.

80486 ASIC SYSTEM BOARD

Processor
80486DX
Processor Speed
33MHz
Chip Set
Micronics
Max. Onboard DRAM
64MB
Cache
64/128/256KB
BIOS
Phoenix
Dimensions
330mm x 218mm
I/O Options
None
NPU Options
4167

CONNECTIONS
Purpose
Location
Purpose
Location
External battery connector
J13
Turbo LED
W9
Speaker
J30
Reset switch
W10
Keylock
J31
Turbo switch
W11

USER CONFIGURABLE SETTINGS
Function
Jumper/Switch
Position
»
Factory configured-do not alter
SW1/1
Off
»
Factory configured-do not alter
SW1/2
Off
»
Factory configured-do not alter
SW1/3
Off
»
Factory configured-do not alter
SW1/4
Off
»
Factory configured-do not alter
SW1/5
Off
»
Factory configured-do not alter
SW1/6
Off
»
Video BIOS cacheable
SW1/7
Off

Video BIOS not cacheable
SW1/7
On
»
Factory configured-do not alter
SW1/8
Off
»
70ns DRAM select
SW2/6
Off

80ns DRAM select
SW2/6
On

64KB or 256KB cache select
SW2/7
Off

128KB cache select
SW2/7
On

64KB cache select
SW2/8
Off

128KB or 256KB cache select
SW2/8
On

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

CACHE JUMPER CONFIGURATION
Size
W5
W6
128KB or 256KB
Closed
N/A
64KB
Open
N/A
256KB
N/A
Closed
64KB or 128KB
N/A
Open

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
1MB
(4) 256KB x 9
NONE
NONE
NONE
2MB
(4) 256KB x 9
(4) 256KB x 9
NONE
NONE
3MB
(4) 256KB x 9
(4) 256KB x 9
(4) 256KB x 9
NONE
4MB
(4) 256KB x 9
(4) 256KB x 9
(4) 256KB x 9
(4) 256KB x 9
4MB
(4) 1MB X 9
NONE
NONE
NONE
5MB
(4) 256KB x 9
(4) 1MB x 9
NONE
NONE
6MB
(4) 256KB x 9
(4) 256KB x 9
(4) 1MB x 9
NONE
7MB
(4) 256KB x 9
(4) 256KB x 9
(4) 256KB x 9
(4) 1MB x 9
8MB
(4) 1MB x 9
(4) 1MB x 9
NONE
NONE
9MB
(4) 256KB x 9
(4) 1MB x 9
(4) 1MB x 9
NONE
10MB
(4) 256KB x 9
(4) 256KB x 9
(4) 1MB x 9
(4) 1MB x 9
12MB
(4) 1MB x 9
(4) 1MB x 9
(4) 1MB x 9
NONE
13MB
(4) 256KB x 9
(4) 1MB x 9
(4) 1MB x 9
(4) 1MB x 9

DRAM CONFIGURATION (CONTINUED)
Size
Bank 0
Bank 1
Bank 2
Bank 3
16MB
(4) 1MB x 9
(4) 1MB x 9
(4) 1MB x 9
(4) 1MB x 9
16MB
(4) 4MB x 9
NONE
NONE
NONE
20MB
(4) 1MB x 9
(4) 4MB x 9
NONE
NONE
24MB
(4) 1MB x 9
(4) 1MB x 9
(4) 4MB x 9
NONE
28MB
(4) 1MB x 9
(4) 1MB x 9
(4) 1MB x 9
(4) 4MB x 9
32MB
(4) 4MB x 9
(4) 4MB x 9
NONE
NONE
36MB
(4) 1MB x 9
(4) 4MB x 9
(4) 4MB x 9
NONE
40MB
(4) 1MB x 9
(4) 1MB x 9
(4) 4MB x 9
(4) 4MB x 9
48MB
(4) 4MB x 9
(4) 4MB x 9
(4) 4MB x 9
NONE
52MB
(4) 1MB x 9
(4) 4MB x 9
(4) 4MB x 9
(4) 4MB x 9
64MB
(4) 4MB x 9
(4) 4MB x 9
(4) 4MB x 9
(4) 4MB x 9

DRAM SWITCH CONFIGURATION
Size
SW2/1
SW2/2
SW2/3
SW2/4
SW2/5
1MB
On
On
On
On
On
2MB
Off
On
On
On
On
3MB
On
Off
On
On
On
4MB
Off
Off
On
On
On
4MB
On
On
Off
On
On
5MB
On
On
Off
On
On
6MB
On
Off
On
Off
On
7MB
Off
On
On
Off
On
8MB
Off
On
Off
On
On
9MB
On
Off
Off
Off
On
10MB
Off
Off
On
Off
On
12MB
On
Off
Off
On
On
13MB
Off
Off
Off
Off
On
16MB
Off
Off
Off
On
On
16MB
On
On
Off
On
Off
20MB
On
On
Off
Off
Off
24MB
On
Off
On
Off
Off
28MB
Off
On
On
Off
Off
32MB
Off
On
Off
On
Off
36MB
On
Off
Off
Off
Off
40MB
Off
Off
On
Off
Off
48MB
On
Off
Off
On
Off
52MB
Off
Off
Off
Off
Off
64MB
Off
Off
Off
On
Off

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80486 ASIC SYSTEM BOARD Motherboard Settings and Configuration

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Processor	80486DX
Processor Speed	33MHz
Chip Set	Micronics
Max. Onboard DRAM	64MB
Cache	64/128/256KB
BIOS	Phoenix
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
External battery connector	J13	Turbo LED	W9
Speaker	J30	Reset switch	W10
Keylock	J31	Turbo switch	W11

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	Factory configured-do not alter	SW1/1	Off
»	Factory configured-do not alter	SW1/2	Off
»	Factory configured-do not alter	SW1/3	Off
»	Factory configured-do not alter	SW1/4	Off
»	Factory configured-do not alter	SW1/5	Off
»	Factory configured-do not alter	SW1/6	Off
»	Video BIOS cacheable	SW1/7	Off
	Video BIOS not cacheable	SW1/7	On
»	Factory configured-do not alter	SW1/8	Off
»	70ns DRAM select	SW2/6	Off
	80ns DRAM select	SW2/6	On
	64KB or 256KB cache select	SW2/7	Off
	128KB cache select	SW2/7	On
	64KB cache select	SW2/8	Off
	128KB or 256KB cache select	SW2/8	On

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

CACHE JUMPER CONFIGURATION
Size	W5	W6
128KB or 256KB	Closed	N/A
64KB	Open	N/A
256KB	N/A	Closed
64KB or 128KB	N/A	Open

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(4) 256KB x 9	NONE	NONE	NONE
2MB	(4) 256KB x 9	(4) 256KB x 9	NONE	NONE
3MB	(4) 256KB x 9	(4) 256KB x 9	(4) 256KB x 9	NONE
4MB	(4) 256KB x 9	(4) 256KB x 9	(4) 256KB x 9	(4) 256KB x 9
4MB	(4) 1MB X 9	NONE	NONE	NONE
5MB	(4) 256KB x 9	(4) 1MB x 9	NONE	NONE
6MB	(4) 256KB x 9	(4) 256KB x 9	(4) 1MB x 9	NONE
7MB	(4) 256KB x 9	(4) 256KB x 9	(4) 256KB x 9	(4) 1MB x 9
8MB	(4) 1MB x 9	(4) 1MB x 9	NONE	NONE
9MB	(4) 256KB x 9	(4) 1MB x 9	(4) 1MB x 9	NONE
10MB	(4) 256KB x 9	(4) 256KB x 9	(4) 1MB x 9	(4) 1MB x 9
12MB	(4) 1MB x 9	(4) 1MB x 9	(4) 1MB x 9	NONE
13MB	(4) 256KB x 9	(4) 1MB x 9	(4) 1MB x 9	(4) 1MB x 9

DRAM CONFIGURATION (CONTINUED)
Size	Bank 0	Bank 1	Bank 2	Bank 3
16MB	(4) 1MB x 9	(4) 1MB x 9	(4) 1MB x 9	(4) 1MB x 9
16MB	(4) 4MB x 9	NONE	NONE	NONE
20MB	(4) 1MB x 9	(4) 4MB x 9	NONE	NONE
24MB	(4) 1MB x 9	(4) 1MB x 9	(4) 4MB x 9	NONE
28MB	(4) 1MB x 9	(4) 1MB x 9	(4) 1MB x 9	(4) 4MB x 9
32MB	(4) 4MB x 9	(4) 4MB x 9	NONE	NONE
36MB	(4) 1MB x 9	(4) 4MB x 9	(4) 4MB x 9	NONE
40MB	(4) 1MB x 9	(4) 1MB x 9	(4) 4MB x 9	(4) 4MB x 9
48MB	(4) 4MB x 9	(4) 4MB x 9	(4) 4MB x 9	NONE
52MB	(4) 1MB x 9	(4) 4MB x 9	(4) 4MB x 9	(4) 4MB x 9
64MB	(4) 4MB x 9	(4) 4MB x 9	(4) 4MB x 9	(4) 4MB x 9

DRAM SWITCH CONFIGURATION
Size	SW2/1	SW2/2	SW2/3	SW2/4	SW2/5
1MB	On	On	On	On	On
2MB	Off	On	On	On	On
3MB	On	Off	On	On	On
4MB	Off	Off	On	On	On
4MB	On	On	Off	On	On
5MB	On	On	Off	On	On
6MB	On	Off	On	Off	On
7MB	Off	On	On	Off	On
8MB	Off	On	Off	On	On
9MB	On	Off	Off	Off	On
10MB	Off	Off	On	Off	On
12MB	On	Off	Off	On	On
13MB	Off	Off	Off	Off	On
16MB	Off	Off	Off	On	On
16MB	On	On	Off	On	Off
20MB	On	On	Off	Off	Off
24MB	On	Off	On	Off	Off
28MB	Off	On	On	Off	Off
32MB	Off	On	Off	On	Off
36MB	On	Off	Off	Off	Off
40MB	Off	Off	On	Off	Off
48MB	On	Off	Off	On	Off
52MB	Off	Off	Off	Off	Off
64MB	Off	Off	Off	On	Off