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M40C Motherboard

m540c Motherboard Diagram


Specification

  • Supports 75/90/100/120/133/150/166/200mhz Pentium Processors.
  • Opti Viper-M chipset.
  • Supports 4 72-pin SIMM DRAM modules in multiple configuration up to 128MB main memory.
  • Support write-back Level 2 external SRAM cache up to 1MB.There are 9 32-pin SRAM sockets for individual SRAM chips, which allow installation of 256KB, 512KB, or IMB of Aysnchronous SRAM and a SRAM module edge connector for user to install 256KB or 512KB Pipeline Burst SRAM.
  • Riser card design to support 2 ISA/2 PCI or 3 ISA/1 PCI expansion slots.
  • Onboard ATI Mach 64 Windows accelerator or 3D graphic accelerator.
  • Onboard the UM8669 Super Multi-I/O chip to support 2 16650 UART compatible serial ports, one parallel port (SPP, EPP, ECP), one floppy disk drive controller with support for drives up to 2.88MB.
  • Onboard Keyboard and PS/2 Mouse controllers.
  • Onboard PCI Bus Master Enhanced IDE controller with 2 connectors support 4 IDE devices in 2 channels, which supports up to PIO Mode 4 and DMA Mode 2.
  • Onboard Creative CT2505 16-bit Sound controller.
  • BIOS supports "Plug and Play", Green PC Power Saving management features.
  • Onboard Flash EPROM for BIOS upgrade from floppy.

Jumpers

JumperDescriptionSettingDesignation
JP4Flash EPROM Type2-3
1-2
5V EPROM
12V EPROM
JP14,JP15IR or COM2 Functionboth 2-3
both open
IR
COM2
J17CMOS Resetopen
closed
Normal
CMOS Clear

Cache Upgrades

Installing ASRAM

Cache    JP7    JP10    JP11    SRAM Chip    Speed    Tag RAM
       
256KBopenopenopen32KBx8pcs<15ns8K8,16K8 or 32K8x1pc
512KBopenopenclosed64KBx8pcs<15ns16K8 or 32K8x1pc
1MBopenclosedclosed128K8x8pcs<15ns32K8x1pc

Installing Pipeline Burst SRAM on Cache Module

The cache module can be installed with 256KB or 512KB Pipeline Burst SRAM Module.Jumper for JP7 needs to be installed to configure the PBSRAM.Note - Install either the SRAM ICs or the Cache Module, do not install both at the same time.

CPU Upgrades

This motherboard Supports 75/90/100/120/133/150/166/200mhz Pentium Processors.

CPU Speed    JP6    JP12JP16JP17
     
75MHzopenclosed    openopen
90MHzclosed    openopenopen
100MHzclosedclosedopenopen
120MHzclosedopenopenclosed
133MHzclosedclosedopenclosed
150MHzclosedopenclosed    closed
166MHzclosedclosedclosedclosed
200MHzclosedclosedclosedopen

AWARD BIOS Setup

BIOS Setup configures the system information that is stored in CMOS RAM.BIOS Setup has an easy-to-use user interface that will be immediately recognised.To access the BIOS press DEL or Ctrl+Alt+Esc when the message "To Enter Setup Before Boot Press Ctrl-Alt-Esc or Del Key" appears.