...because we can't all be on the bleeding edge...





486TC4

UNIDENTIFIED

486TC4

Processor

80486SX/80487SX/80486DX

Processor Speed

20/25/33MHz

Chip Set

C & T

Max. Onboard DRAM

32MB

SRAM Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card slot

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP2

Turbo LED

JP10

Speaker

JP7

Turbo switch

JP11

Power LED & keylock

JP8

32-bit external memory card

S1

Reset switch

JP9

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

J3

unknown

Factory configured - do not alter

J4

unknown

Battery select internal

JP1

closed

 

Battery select external

JP1

open

CMOS memory normal operation

JP3

pins 1 & 2 closed

 

CMOS memory clear

JP3

pins 2 & 3 closed

Monitor type select color

JP4

pins 1 & 2 closed

 

Monitor type select monochrome

JP4

pins 2 & 3 closed

Factory configured - do not alter

JP5

unknown

Factory configured - do not alter

JP15

unknown

CPU JUMPER CONFIGURATION

CPU

JP12

JP13

JP16

80486DX

pins 2 & 3 closed

pins 2 & 3 closed

closed

80487SX

pins 1 & 2 closed

pins 2 & 3 closed

closed

80486SX

pins 2 & 3 closed

pins 1 & 2 closed

open

SRAM JUMPER CONFIGURATION

Jumper

64KB

128KB

256KB

SR1

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

SR2

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

SR3

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

SR4

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

SR5

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

SR6

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

SR7

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

SR8

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

SR9

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

SR10

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

SR11

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

SRAM CONFIGURATION

Size

Cache SRAM

Location

TAG (U35)

TAG (U37)

32KB

(4) 8K x 8

Bank 0

(1) 8K x 8

NONE

64KB

(8) 8K x 8

Banks 0 & 1

(1) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

Bank 0

(1) 8K x 8

NONE

256KB

(8) 32K x 8

Banks 0 & 1

(1) 8K x 8

(1) 8K x 8

DRAM CONFIGURATION

Size

Bank 0

Bank 1

JP6

1MB

(4) 256K x 9

NONE

pins 1 & 2 closed

2MB

(4) 256K x 9

(4) 256K x 9

pins 1 & 2 closed

4MB

(4) 1M x 9

NONE

pins 1 & 2 closed

5MB

(4) 1M x 9

(4) 256K x 9

pins 2 & 3 closed

8MB

(4) 1M x 9

(4) 1M x 9

pins 1 & 2 closed

16MB

(4) 4M x 9

NONE

pins 1 & 2 closed

17MB

(4) 4M x 9

(4) 256K x 9

pins 2 & 3 closed

20MB

(4) 4M x 9

(4) 1M x 9

pins 2 & 3 closed

32MB

(4) 4M x 9

(4) 4M x 9

pins 1 & 2 closed