YL-A09 Motherboard Settings and Configuration

UNIDENTIFIED

YL-A09

Processor
80286
Processor Speed
16MHz
Chip Set
C & T Neat
Max. Onboard DRAM
8MB
Cache
None
BIOS
AMI
Dimensions
330mm x 259mm
I/O Options
None
NPU Options
80287

CONNECTIONS
Purpose
Location
Purpose
Location
External battery
J3
Turbo LED
JP13
Speaker
JP11
Turbo Switch
JP14
Reset switch
JP12
Power LED & keylock
JP16

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
Factory configured - do not alter
JP2
closed
»
NPU mode select synchronous with CPU
JP3
pins 1 & 2 closed

NPU mode select synchronous with oscillator installed at Y1
JP3
pins 2 & 3 closed
»
CPU speed select fast
JP14
closed

CPU speed select slow
JP14
open
»
BIOS type select 27256
JP15
pins 2 & 3 closed

BIOS type select 27128
JP15
pins 1 & 2 closed
»
Parity check enabled
JP17
pins 1 & 2 closed

Parity check disabled
JP17
pins 2 & 3 closed
»
Quiet bus enabled
JP20
pins 1 & 2 closed

Quiet bus disabled (Use for high speed I/O cards)
JP20
pins 2 & 3 closed
»
Same type of memory is used in all four banks
JP23
pins 1 & 2 closed

First two banks are different than last two banks of memory
JP23
pins 2 & 3 closed

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
512KB
(18) 41256
NONE
NONE
NONE
1MB
(18) 41256
(18) 41256
NONE
NONE
1.5MB
(18) 41256
(18) 41256
(2) 256K x 9
NONE
2MB
(18) 41256
(18) 41256
(2) 256K x 9
(2) 256K x 9
2MB
(18) 411000
NONE
NONE
NONE
4MB
(18) 411000
(18) 411000
NONE
NONE
6MB
(18) 411000
(18) 411000
(2) 1M x 9
NONE
8MB
(18) 411000
(18) 411000
(2) 1M x 9
(2) 1M x 9

DRAM JUMPER CONFIGURATION
Size
JP7
JP8
JP9
JP10
JP17
JP23
512KB
Open
2 & 3
Open
Open
1 & 2
1 & 2
1MB
Open
2 & 3
Open
2-3
1 & 2
1 & 2
1.5MB
1 & 2
2 & 3
Open
2-3
1 & 2
1 & 2
2MB
1 & 2
2 & 3
1 & 2
2-3
1 & 2
1 & 2
2MB
Open
2 & 3
Open
Open
1 & 2
1 & 2
4MB
Open
2 & 3
Open
2-3
1 & 2
1 & 2
6MB
1 & 2
2 & 3
Open
2-3
1 & 2
1 & 2
8MB
1 & 2
2 & 3
1 & 2
2-3
1 & 2
1 & 2
Note:Pins designated should be in the closed position.

DRAM SWITCH CONFIGURATION
Size
SW1/3
SW1/4
SW1/5
512KB
Off
Off
Off
1MB
On
Off
Off
1.5MB
Off
On
Off
2MB
On
On
Off
2MB
Off
Off
On
4MB
On
Off
On
6MB
Off
On
On
8MB
On
On
On

I/O CONFIGURATION
Setting
JP1A
JP1B
JP1C
I/O at full speed during memory refresh cycle
Open
Closed
Open
I/O at full speed during memory refresh cycle and DMA
Closed
Open
Open
I/O at full speed
Closed
Closed
Closed

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YL-A09 Motherboard Settings and Configuration

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Processor	80286
Processor Speed	16MHz
Chip Set	C & T Neat
Max. Onboard DRAM	8MB
Cache	None
BIOS	AMI
Dimensions	330mm x 259mm
I/O Options	None
NPU Options	80287

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J3	Turbo LED	JP13
Speaker	JP11	Turbo Switch	JP14
Reset switch	JP12	Power LED & keylock	JP16

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	JP2	closed
»	NPU mode select synchronous with CPU	JP3	pins 1 & 2 closed
	NPU mode select synchronous with oscillator installed at Y1	JP3	pins 2 & 3 closed
»	CPU speed select fast	JP14	closed
	CPU speed select slow	JP14	open
»	BIOS type select 27256	JP15	pins 2 & 3 closed
	BIOS type select 27128	JP15	pins 1 & 2 closed
»	Parity check enabled	JP17	pins 1 & 2 closed
	Parity check disabled	JP17	pins 2 & 3 closed
»	Quiet bus enabled	JP20	pins 1 & 2 closed
	Quiet bus disabled (Use for high speed I/O cards)	JP20	pins 2 & 3 closed
»	Same type of memory is used in all four banks	JP23	pins 1 & 2 closed
	First two banks are different than last two banks of memory	JP23	pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
512KB	(18) 41256	NONE	NONE	NONE
1MB	(18) 41256	(18) 41256	NONE	NONE
1.5MB	(18) 41256	(18) 41256	(2) 256K x 9	NONE
2MB	(18) 41256	(18) 41256	(2) 256K x 9	(2) 256K x 9
2MB	(18) 411000	NONE	NONE	NONE
4MB	(18) 411000	(18) 411000	NONE	NONE
6MB	(18) 411000	(18) 411000	(2) 1M x 9	NONE
8MB	(18) 411000	(18) 411000	(2) 1M x 9	(2) 1M x 9

DRAM JUMPER CONFIGURATION
Size	JP7	JP8	JP9	JP10	JP17	JP23
512KB	Open	2 & 3	Open	Open	1 & 2	1 & 2
1MB	Open	2 & 3	Open	2-3	1 & 2	1 & 2
1.5MB	1 & 2	2 & 3	Open	2-3	1 & 2	1 & 2
2MB	1 & 2	2 & 3	1 & 2	2-3	1 & 2	1 & 2
2MB	Open	2 & 3	Open	Open	1 & 2	1 & 2
4MB	Open	2 & 3	Open	2-3	1 & 2	1 & 2
6MB	1 & 2	2 & 3	Open	2-3	1 & 2	1 & 2
8MB	1 & 2	2 & 3	1 & 2	2-3	1 & 2	1 & 2
Note:Pins designated should be in the closed position.

DRAM SWITCH CONFIGURATION
Size	SW1/3	SW1/4	SW1/5
512KB	Off	Off	Off
1MB	On	Off	Off
1.5MB	Off	On	Off
2MB	On	On	Off
2MB	Off	Off	On
4MB	On	Off	On
6MB	Off	On	On
8MB	On	On	On

I/O CONFIGURATION
Setting	JP1A	JP1B	JP1C
I/O at full speed during memory refresh cycle	Open	Closed	Open
I/O at full speed during memory refresh cycle and DMA	Closed	Open	Open
I/O at full speed	Closed	Closed	Closed