SY-24A Motherboard Settings and Configuration

SOYO COMPUTER CO., LTD.

SY-24A

Processor
80386DX/80486SX/80486DX/80486DX2
Processor Speed
25/33/40/50(internal)/50/66(internal)MHz
Chip Set
CONTAQ
Max. Onboard DRAM
32MB
Cache
64/256KB
BIOS
AMI
Dimensions
330mm x 217mm
I/O Options
None
NPU Options
80387/3167

CONNECTIONS
Purpose
Location
Purpose
Location
Power LED & keylock
J17
External battery
J20
Speaker
J18
Turbo switch
J21
Reset switch
J19
Turbo LED
J22

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
Monitor type select monochrome
JP3
Open

Monitor type select color
JP3
Closed
»
CMOS memory normal operation
JP5
pins 1 & 2 closed

CMOS memory clear
JP5
pins 2 & 3 closed

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
17MB
(4) 4M x 9
(4) 256K x 9
2OMB
(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 (U28)
Dirty Bit (U44)
64KB
(4) 8K x 8
(4) 8K x 8
(1) 8K x 8
(1) 16K x 4
256KB
(4) 32K x 8
(4) 32K x 8
(1) 32K x 8
(1) 16K x 4
Note:Dirty bit need only be filled if writeback mode is selected in the CMOS-advanced chipset setup.

CACHE JUMPER CONFIGURATION
Size
JP30
JP31
JP32
JP33
JP34
JP35
64KB
Open
Open
Open
Open
Open
2 & 3
256KB
Closed
Closed
Closed
Closed
1 & 2
2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type
JP36
JP37
JP38
JP39
JP40
JP41
JP42
JP43
JP44
80386DX
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
2 & 3
80486SX
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
80486DX
1 & 2
1 & 2
1 & 2
1 & 2
2 & 3
2 & 3
2 & 3
2 & 3
1 & 2
80486DX2
1 & 2
1 & 2
1 & 2
1 & 2
2 & 3
2 & 3
2 & 3
2 & 3
1 & 2
Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION
Speed
OSC2
JP8
JP13
JP14
25/50iMHz
25MHz
pins 1 & 2 closed
Open
Closed
25/50iMHz
50MHz
pins 2 & 3 closed
Open
Closed
33/66iMHz
33.33MHz
pins 1 & 2 closed
Closed
Open
33/66iMHz
66.667MHz
pins 2 & 3 closed
Closed
Open
40MHz
40MHz
pins 1 & 2 closed
Open
Open
40MHz
80MHz
pins 2 & 3 closed
Open
Open
50MHz
50MHz
pins 1 & 2 closed
Closed
Closed

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SY-24A Motherboard Settings and Configuration

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Processor	80386DX/80486SX/80486DX/80486DX2
Processor Speed	25/33/40/50(internal)/50/66(internal)MHz
Chip Set	CONTAQ
Max. Onboard DRAM	32MB
Cache	64/256KB
BIOS	AMI
Dimensions	330mm x 217mm
I/O Options	None
NPU Options	80387/3167

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	J17	External battery	J20
Speaker	J18	Turbo switch	J21
Reset switch	J19	Turbo LED	J22

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select monochrome	JP3	Open
	Monitor type select color	JP3	Closed
»	CMOS memory normal operation	JP5	pins 1 & 2 closed
	CMOS memory clear	JP5	pins 2 & 3 closed

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
17MB	(4) 4M x 9	(4) 256K x 9
2OMB	(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 (U28)	Dirty Bit (U44)
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8	(1) 16K x 4
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8	(1) 16K x 4
Note:Dirty bit need only be filled if writeback mode is selected in the CMOS-advanced chipset setup.

CACHE JUMPER CONFIGURATION
Size	JP30	JP31	JP32	JP33	JP34	JP35
64KB	Open	Open	Open	Open	Open	2 & 3
256KB	Closed	Closed	Closed	Closed	1 & 2	2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	JP36	JP37	JP38	JP39	JP40	JP41	JP42	JP43	JP44
80386DX	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3	2 & 3
80486SX	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2
80486DX	1 & 2	1 & 2	1 & 2	1 & 2	2 & 3	2 & 3	2 & 3	2 & 3	1 & 2
80486DX2	1 & 2	1 & 2	1 & 2	1 & 2	2 & 3	2 & 3	2 & 3	2 & 3	1 & 2
Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION
Speed	OSC2	JP8	JP13	JP14
25/50iMHz	25MHz	pins 1 & 2 closed	Open	Closed
25/50iMHz	50MHz	pins 2 & 3 closed	Open	Closed
33/66iMHz	33.33MHz	pins 1 & 2 closed	Closed	Open
33/66iMHz	66.667MHz	pins 2 & 3 closed	Closed	Open
40MHz	40MHz	pins 1 & 2 closed	Open	Open
40MHz	80MHz	pins 2 & 3 closed	Open	Open
50MHz	50MHz	pins 1 & 2 closed	Closed	Closed