TEMPO 486-25/33/50 EV-18173 Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX
Processor Speed	25/33/50MHZ
Chip Set	C & T/Suntac
Max. onboard DRAM	32MB
SRAM Cache	32/64KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	Floppy drive interface, front panel connector, IDE interface parallel port, serial ports (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Parallel Port	CN1	Reset switch	J1
Serial Port (COM1)	CN2	Speaker	J3
Serial Port (COM2)	CN3	Front panel connector	J10
IDE interface	CN4	IDE interface LED	J13
Floppy drive interface	CN5	Unknown	J18
Note:The location of J1 is unknown.

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	Factory configured - do not alter	JP1	Unknown
»	Factory configured - do not alter	JP2	Unknown
»	Factory configured - do not alter	JP3	Unknown
»	Factory configured - do not alter	JP4	Unknown
»	I/O bus speed select 1 wait state	JP5	Open
	I/O bus speed select 0 wait states	JP5	Closed
»	CMOS memory normal operation	JP8	Unknown
	CMOS memory clear	JP11	Unknown
»	Factory configured - do not alter	JP11	Unknown

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
20MB	(4) 1M x 9	(4) 4M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CACHE CONFIGURATION
Size	Cache	TAG	Dirty Bit (DB)
32KB	(4) 8K x 8	(1) 8K x 8	(1) 16K x 1
64KB	(4) 16K x 8	(1) 16K x 8	(1) 16K x 1

COM1 DTE/DCE CONFIGURATION
Mode	Jumper Block COM1
DCE
DTE

COM2 DTE/DCE CONFIGURATION
Mode	Jumper Block COM2
DCE
DTE

CACHE RESISTOR CONFIGURATION
Size	TR1	TR2
32KB	Not Installed	Installed
64KB	Installed	Not Installed

CPU TYPE CONFIGURATION
TYPE	JP7	JP9
80486SX	Pins 2 & 3 closed	Open
80487SX	Pins 2 & 3 closed	Open
80486DX	Pins 1 & 2 closed	Closed