ENPC TECHNOLOGY CORPORATION

EP-PS11 (REV. A)
Device Type Mainboard
Processor CX 6X86MX/CX M2/AM K5/AM K6/AM K6-2/Pentium/Pentium MMX
Processor Speed 90/100/120/133/150/166/180/200/233/266/300/333/350/366/380/400/450/475MHz
Chip Set SIS
Video Chip Set SIS
Maximum Onboard Memory 768MB (SDRAM supported)
Maximum Video Memory 4MB
Cache 512KB/1024MB
BIOS Award
Dimensions 220mm x 230mm
I/O Options 32-bit PCI slots (3), floppy drive interface, IDE interfaces (2), parallel interface, PS/2 mouse interface, serial interfaces (2), VGA feature connector, IR connector, USB interfaces (2), ATX power connector, SB-Link connector


CONNECTIONS

Purpose

Location

Purpose

Location

ATX power connector

ATX

VGA connector CN12
PS/2 mouse interface CN1 SB Link connector CN13
USB interface 1 CN2 Reset switch CN14/Pins 1 & 2
USB interface 2 CN3 IDE interface 2 LED CN14/Pins 3 & 4
Chassis fan power CN4 Power switch CN14/Pins 5 & 6
CPU fan power CN5 ACPI LED CN14/Pins 7 & 8
Serial interface 1 CN6 IDE interface 1 LED CN14/Pins 9 & 10
Serial interface 2 CN7 Power LED & keylock CN14/Pins 11-16
Parallel interface CN8 Speaker CN14/Pins 17-20
IDE interface 1 CN9 IR connector IR
IDE interface 2 CN10 32-bit PCI slots

PC1 - PC3
Floppy drive interface CN11    


USER CONFIGURABLE SETTINGS

Function

Label

Position

 

 Power supply selection ATX JP1 Pins 1 & 2 closed
  Power supply selection AT JP1 Pins 2 & 3 closed
  Flash BIOS voltage selection 12v JP3 Pins 1 & 2 closed

 

 Flash BIOS voltage selection 5v JP3 Pins 2 & 3 closed
  Chipset version selection B2 JP4 Pins 1 & 2 closed
  Chipset version selection A JP4 Pins 2 & 3 closed

»

 CMOS memory normal operation JP6 Open
  CMOS memory clear JP6 Closed
  Cache write through mode JP7 Closed
  Cache write back mode JP7 Open
  CPU voltage auto-detect enabled JP9 Closed
  CPU voltage auto-detect disabled JP9 Open
  Cache toggle mode JP10 Pins 5 & 6 closed
  Cache linear mode JP10 Pins 5 & 6 open


CACHE JUMPER CONFIGURATION

Size

JP10
512KB Pins 1 & 2 closed
1024KB Pins 1 & 2, 3 & 4 closed


CLOCK SPEED SELECTION

Speed

 FS0 FS1 FS2 FS3

66MHz

 Closed Closed Closed Open

75MHz

 Open Closed Closed Open

83MHz

 Closed Open Closed Open

95MHz

 Open Open Closed Open

100MHz

 Closed Closed Open Open

112MHz

 Open Closed Open Open

124MHz

 Closed Open Open Open

133MHz

 Open Open Open Open


CPU MULTIPLIER SELECTION

Multiplier

 JP11 JP12 JP13

2x

 Pins 1 & 2 closed Pins 1 & 2 closed Pins 2 & 3 closed

2.5x

 Pins 1 & 2 closed Pins 2 & 3 closed Pins 2 & 3 closed

3x

 Pins 1 & 2 closed Pins 2 & 3 closed Pins 1 & 2 closed
3.5x Pins 1 & 2 closed Pins 1 & 2 closed Pins 1 & 2 closed
4x Pins 2 & 3 closed Pins 1 & 2 closed Pins 2 & 3 closed
4.5x Pins 2 & 3 closed Pins 2 & 3 closed Pins 2 & 3 closed
5x Pins 2 & 3 closed Pins 2 & 3 closed Pins 1 & 2 closed
5.5x Pins 2 & 3 closed Pins 1 & 2 closed Pins 1 & 2 closed


DIMM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

8MB

(1) 1M x 64

None

None

16MB

(1) 1M x 64

(1) 1M x 64

None

16MB

(1) 2M x 64

None

None

24MB

(1) 1M x 64

(1) 1M x 64

(1) 1M x 64

32MB

(1) 2M x 64

(1) 2M x 64

None

32MB

(1) 4M x 64

None

None

32MB

(1) 2M x 64

(1) 1M x 64

(1) 1M x 64

48MB

(1) 2M x 64

(1) 2M x 64

(1) 2M x 64

48MB

(1) 4M x 64

(1) 1M x 64

(1) 1M x 64

64MB

(1) 4M x 64

(1) 4M x 64

None

64MB

(1) 8M x 64

None

None

64MB

(1) 4M x 64

(1) 2M x 64

(1) 2M x 64

80MB

(1) 8M x 64

(1) 1M x 64

(1) 1M x 64

96MB

(1) 4M x 64

(1) 4M x 64

(1) 4M x 64

96MB

(1) 8M x 64

(1) 2M x 64

(1) 2M x 64

128MB

(1) 8M x 64

(1) 8M x 64

None

128MB

(1) 16M x 64

None

None

128MB

(1) 8M x 64

(1) 4M x 64

(1) 4M x 64

144MB

(1) 16M x 64

(1) 1M x 64

(1) 1M x 64

160MB

(1) 16M x 64

(1) 2M x 64

(1) 2M x 64

192MB

(1) 8M x 64

(1) 8M x 64

(1) 8M x 64

192MB

(1) 16M x 64

(1) 4M x 64

(1) 4M x 64

256MB

(1) 16M x 64

(1) 16M x 64

None

256MB

(1) 32M x 64

None

None

256MB

(1) 16M x 64

(1) 8M x 64

(1) 8M x 64

272MB

(1) 32M x 64

(1) 1M x 64

(1) 1M x 64

288MB

(1) 32M x 64

(1) 2M x 64

(1) 2M x 64

320MB

(1) 32M x 64

(1) 4M x 64

(1) 4M x 64

384MB

(1) 16M x 64

(1) 16M x 64

(1) 16M x 64

384MB

(1) 32M x 64

(1) 8M x 64

(1) 8M x 64

512MB

(1) 32M x 64

(1) 32M x 64

None

512MB

(1) 32M x 64

(1) 16M x 64

(1) 16M x 64

768MB

(1) 32M x 64

(1) 32M x 64

(1) 32M x 64
Note:  Board supports SDRAM memory.


CPU VOLTAGE SELECTION

Voltage

J10
Auto-detect Pins 1 & 2, 4 & 5, 7 & 8, 10 & 11 closed
2.2V Pins 5 & 6 closed
2.8V Pins 11 & 12 closed
2.9V Pins 2 & 3, 11 & 12 closed
3.3V Pins 2 & 3, 5 & 6, 11 & 12 closed
3.5V Pins 2 & 3, 5 & 6, 8 & 9, 11 & 12 closed


MISCELLANEOUS TECHNICAL NOTES

Processor speeds listed include the speeds available for the Cyrix 6X86MX CPU, which is synonymous with the Cyrix M2 CPU.