FIC 486-GVT-2

Motherboard Specifications and Settings

Motherboard Code: FIC 486-GVT-2

BIOS Date & Version: Cache = 256KB

Key Features

The 486-GVT mainboard comes with the following features:

Supports Intel 80486SX/DX/DX2/486 SL-Enhanced/Cyrix Cx486s/DX/Intel Pentium OverDrive microprocessor in PQFP and PGA packages.

VIA GMC VT82C486A PC/AT chipset includes built-in 8042 keyboard controller.

Award BIOS.

Supports 64/128/256KB direct-mapped write-back/write-through cache memory.

30- and 72-pin SIMM sockets support 1 up to 96MB DRAM for 486 system, and provides page mode DRAM operation.

Supports system and video BIOS cacheable and shadow.

Supports decoupled DRAM refresh.

Optional built-in ZIF socket that accepts Intel’s OverDrive processors.

Six 16-bit and one 8-bit ISA expansion slots.

Supports two VESA bus slots for Local Bus master or Slave.

Dallas DS1287/DS12885Q/ VIA VT82885V real time clock/calendar.

Provides built-in power management features ideal for Green PC’s.

Motherboard Jumper Settings

Jumper	Pin Definition
J2	Display Type Select Open Mono/EGA/VGA (default) Short Color
J5	External, Internal Battery Select External Battery 2-3 Internal Battery (Default)
J6	Short Adaptec ISA Master 1524B/C SCSI card only (transfer rate >= 5.7MB/s) Open Default (transfer rate < 5.7 MB/s)
J7	Password Clear (Award BIOS Select) Short Clear Password Open Default
J12	Cyrix CPU 2 X Clock mode set 2 X 2-3 1 X (default)
JP1, JP5	JP1 JP5 1-2 1-2 (factory default)
JP4	Local IDE Default For VESA local VGA Card Installed @ VESA slot 0 only
JT1	P24T Write-back/Through Select Write-back 2-3 Write-through
JX1	Regular CPU Clock Select 1 X (default) 2-3 2 X

CPU Jumper Select

Jumper	P23S/P4S/P24S (PGA)	486SX DX/DX2 (PGA)	P24T (PGA)	Cx486 (M6) (PGA)	Cx486DX (M7) Cx486S+ (M6+C6) (PGA)
JC1	2-3	1-2	1-2	2-3	1-2
JC2	2-3	1-2	1-2	2-3	1-2
JC3	OPEN	SHORT	OPEN	SHORT	SHORT
JC4	OPEN	OPEN	SHORT	OPEN	OPEN
JC5	SHORT	SHORT	OPEN	OPEN	OPEN
JC7	1-2	1-2	2-3	1-2	1-2

Jumper	P23S/P24S (PGA)	486DX/DX2 /SX(PGA)	Cx486S Cx486S+/DX Cx487S (M6,M6+,C6 M7) (PGA)	P23S/P24S/ Cx486S (PQFP)
RN13	INST	OPEN	OPEN	OPEN
RN14	OPEN	OPEN	OPEN	INST
RN16	OPEN	OPEN	INST	OPEN

Jumper	Pin Definition
JC6	486SX/P23S/P24S/Cx486S PQFP Short Disable Open Enable
JCX1	Short Cyrix Cx486S/DX Open Intel S-series CPU, others (Default) Cyrix Cx486S/dx
JCX2	Intel S-series CPU, others (Default) Cyrix Cx486s/dx
JX2, JP2	IRQ 15 (Regular CPUs- Default) – SMI (Cyrix or Intel S-series CPUs)