MANUAIS DE MOTHERBOARDS BIOTEQ

MB-14XXPD/E
33/40 mhz zero-wait 80486 Turbo Main Board

MAINBOARD LAYOUT

JUMPER SETTINGS

JP 1 CMOS DISCHARGE

1-2 Closed : To clear CMOS Setup memory, if there has been any inappropriate operation incurring the system in failure
2-3 Closed : To maintain setup and extended setuo data in CMOS for normal functioning
Note : After clear CMOS SETUP memory, please adjust pin 2-3 of jp 7 to be closed again. Otherwise the system won't be booted up.

JP 2 : Monitor Type

Open : Mono
Closed : Color

JP3,JP4,JP5 : CPU TYPE SELECTION

CPU Type

 JP 3 Jp 4 Jp 5
80486DX 2-3 Closed Closed 1-2 Closed
80486SX open open 2-3 Closed

JP8,9,10,12,13 CACHE RAM SIZE SETTINGS :

SRAM SIZE Jp8 Jp9 Jp10 Jp 12 Jp 13
64 K open open open open 2-3 closed
128 K open open closed closed 1-2 closed
256 K open closed closed closed 2-3 closed

CONNECTORS :

SW1 : RESET
1.ground
2.reset control

SW2 : TURBO SWITCH
1.ground
2.Turbo/Non turbo Control

J11 : 6.0 Volt External Battery Connector
1. 6Volt
2. No connection
3. Ground
4. Ground

J20 : Power LED & KEYLOCK
1. power led +
2. No Connection
3. Ground
4. Keylock
5. Ground

J 21 : SPEAKER
1. speaker data
2. No connection
3. ground
4. +5v

JP 11 : TURBO LED
1. Turbo LED +
2. Turbo LED -
3. + 5V
4. Ground

CACHE RAM COMBINATION :

SRAM Size

Cache RAM

Tag Ram

Cacheable Main Memory

64 K

u35,36,37,38,50,51,52,53
8k*8 - 25nS

u35 8k*8 - 20 nS

16 MB

128 K

u35,36,37,38
32k * 8 - 25nS

u35 8k*8 - 20 nS

32 MB

256 K

u35,36,37,38,50,51,52,53
32k * 8 - 25nS

u34 32k*8 - 20nS

64 MB