PRODUCTS -
PRODUCTS - MAINBOARDS - 5BVX

MB8500TVX
- Intel VX Chipset
- AT Format
CPU Support
- Intel MMX P55C upto 200MHz (v2.3 & after)
- Intel Pentium P54C/CT/CS/CQS 75 to 200MHz
- Cyris 6x86 P-120+ TO p-166+
- AMD K5 PR-75 TO PR-166
- Provides 321-pin ZIF socket (Socket 7)
Speed
- Supports CPU bus clock from 50MHz - 66MHz
- Supports DRAM 8MB to 128MB on borad
- I/O clock 8MHz for ISA Bus
DRAM Memory
- Two banks (Fourpcs) 72-pin SIMM memory
- Supports 4/8/16/32 MB SIMM module
- Supports DRAM 8MB to 128MB on board
- Suppots EDO and Fast Page mode DRAM
- Supports Symmetrical and Asymmetrical DRAM
Cache Memory
- Supports Pipelined Burst SRAM upto 512KB
Bus Slots
- Four 16-bit ISA Bus and Three 32-bit PCI Bus
PCI Enhanced IDE Built-in On Board
- Support four IDE hard drives
- Supports mode 4, Master mode, high performance hard drivers
- Supports IDE interface with CD-ROM
- Supports high capacity hard disk drives
- Supports LBA mode
ISA I/O Built-in On Board
- One multi-mode parallel port (SPP/EPP/ECP)
- Two serial ports 16550UART, with 16 byte FIFO
- Supports 360KB, 720KB, 1.2MB, 1.44MB AND 2.88MB floppy disk drives
- Supports PS/2 Mouse
Universal Serial Bus (USB)
- Supports two Universal Serial Bus (USB) ports
Dimension
- 22cm X 22cm (W x L)
BIOS
- AMI legal friendly BIOS
- Flash Memory
- Supports PnP functions
 
JP3: Flash ROM Type Voltage Select:
1-2 Closed: +5V 2-3 Closed: +12V
JP4: CMOS Function Select:
Open: Normal setting Closed: Clear CMOS setting
CPU Installation Type Select
  CPU JP6 JP11 Remark
Single
Voltage		 INTEL P54C/CQS/CT
Cyrix 6x86TM
AMD K5 PR:
xxxAB / xxxAC / xxxAF		 1-2
closed		 1-2,
3-4
closed		 V I/O & Vcore
= 3.45V / 3.5V
Dual
Voltage		 INTEL P55C/CT
AMD K5 PR:
xxxAH / xxxAJ / xxxAK		 2-3
closed		 all open V I/O=3.45V/3.5V
Vcore=2.6V/2.9V
JP12:
1. Core Voltage & I/O Voltage level Select for Single Voltage CPU
2. I/O Voltage level Select for Dual Voltage CPU
Open: 3.5V (VRE SPEC.) Closed: 3.45V (Standard and VR Spec.)
JP14: Core Voltage level Select for Dual Voltage CPU
Open: 2.9V Closed: 2.6V
JP 7: Cache RAM Size Select
Jumper No. 256KB 512KB
JP7 open closed
Cache RAM Combination
SRAM
Size Locate		 Cache RAM
U18,U21		 Tag RAM
U12		 Cacheable
Main
Memory(MB)
256KB (32Kx32)x2pcs (8Kx8)/(32Kx8)x1pcs 64
512KB (64Kx32)x2pcs (32Kx8)x1pcs 64
CPU Clock Select

INTEL CPU
CPU
Speed		 Bus Clock
& Multiplier		 JP5
(1-2)		 JP5
(3-4)		 JP8 JP9
75MHz 50MHz x 1.5 closed closed open open
90MHz 60MHz x 1.5 closed open open open
100MHz 66MHz x 1.5 open closed open open
120MHz 60MHz x 2 closed open open closed
133MHz 66MHz x 2 open closed open closed
150MHz 60MHz x 2.5 closed open closed closed
166MHz 66MHz x 2.5 open closed closed closed
180MHz 60MHz x 3 closed open closed open
200MHz 66MHz x 3 open closed closed open
JP5(1-2) closed & (3-4) closed: Bus Clock = 50MHz
JP5(1-2) closed & (3-4) open: Bus CLOCK = 60MHz
JP5(1-2) open & (3-4) closed: Bus CLOCK = 66MHz
JP8 open & JP9 open: Multiplier = 1.5
JP8 open & JP9 closed: Multiplier = 2
JP8 closed & JP9 closed: Multiplier = 2.5
JP8 closed & JP9 open: Multiplier = 3
Cyrix 6x86TM CPU
CPU
Speed		 Bus Clock
& Multiplier		 JP5
(1-2)		 JP5
(3-4)		 JP8 JP9
P-120+ 100MHz 50MHz x 2 closed closed open Notes **
P-133+ 110MHz 55MHz x 2 open open open Notes **
P150+ 120MHz 60MHz x 2 closed open open Notes **
P166+ 133MHz 66MHz x 2 open closed open Notes **
JP5(1-2) closed & (3-4) closed: Bus Clock = 50MHz
JP5(1-2) open & (3-4) open: Bus Clock = 55MHz
JP5(1-2) closed & (3-4) open: Bus CLOCK = 60MHz
JP5(1-2) open & (3-4) closed: Bus CLOCK = 66MHz
Notes**: JP8 open & JP9 open: Multiplier =2 for
P.C.B. version "MB-8500TVX-A" 2.2 and previous
Notes**: JP8 open & JP9 close: Multiplier =2 for
P.C.B. version "MB-8500TVX-A" 2.3 and afterwards
AMD-K5TM CPU
CPU
Speed		 JP5
(1-2)		 JP5
(3-4)		 JP8 JP9
PR-75 closed closed open open
PR-90 closed open open open
PR-100 open closed open open
PR-120 closed open open open
PR-133 open closed open open
PR-166 open closed closed closed
PR-200 open closed closed open
JP5(1-2) closed & (3-4) closed: Bus Clock = 50MHz
JP5(1-2) closed & (3-4) open: Bus CLOCK = 60MHz
JP5(1-2) open & (3-4) closed: Bus CLOCK = 66MHz
Connectors
J13:
Pin
No.		 Assignment Function Pin
No.		 Assignment Function
1 Speaker Speaker
Connector		 14 No Connection No Connection
2 No Connection 15 No Connection
3 Ground 16 No Connection No Connection
4 VCC 17 Green Control Green
Switch
5 Power LED (+) Power LED
&
Keylock		 18 Ground
6 No Connection 19 No Connection No Connection
7 Ground 20 HDD LED(-) HDD LED
8 Key lock 21 HDD LED(+)
9 Ground 22 No Connection No Connection
10 Turbo LED(-) Turbo LED 23 No Connection No Connection
11 Turbo LED(+) 24 Ground
12 Reset Control Reset 25 VCC VCC
GROUND
13 Ground 26 Ground
JP13: FAN Power Connector
Pin 2: GND Pin 1: +12V
J14: IR Module Connector
Pin 1: IRTX / Pin 2: GND / Pin 3: IRRX / Pin 4: NC / Pin 5: VCC
J5: PS/2 Mouse Cable Connector
Pin 1: MS_DATA / Pin 2: NC / Pin 3: GND
Pin 4: VCC / Pin 5: MS_CLK
J3: USB Cable Connector
Pin A1, B1: VCC Pin A2: Port0 DATA-
Pin A3: Port0 DATA+ Pin A4, B4: GND
Pin B2: Port1 DATA- Pin B3: Port1 DATA+
DRAM Installation

Dram Access Time:
Fast page mode 70ns required or EDO mode 60ns required.

DRAM Type:
4MB / 8MB / 16MB / 32MB SIMM Module (72pin)
Total Memory
(MB)		 Bank 0
(SIMM1-SIMM2)		 Bank1
(SIMM3-SIMM4)
8M 4M x 2PCS -------
8M ------- 4M x 2PCS
16M 8M x 2PCS -------
16M ------- 8M x 2PCS
32M 16M x 2PCS -------
32M ------- 16M x 2PCS
64M 32M x 2PCS -------
64M ------- 32M x 2PCS
16M 4M x 2PCS 4M x 2PCS
24M 4M x 2PCS 8M x 2PCS
32M 8M x 2PCS 8M x 2PCS
40M 4M x 2PCS 16M x 2PCS
48M 8M x 2PCS 16M x 2PCS
64M 16M x 2PCS 16M x 2PCS
72M 4M x 2PCS 32M x 2PCS
80M 8M x 2PCS 32M x 2PCS
96M 16M x 2PCS 32M x 2PCS
128M 32M x 2PCS 32M x 2PCS
Notes:
Each bank can be installed and worked individually, the mainboard provides optimal performance and free choices depending on your needs.
The list above for DRAM configuration is just for reference.
EDO Type DRAM and FAST PAGE Type DRAM can be mixed in each bank.