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6300 XT

AT & T, INC.

6300 XT

Processor

8086

Processor Speed

4.77MHz

Chip Set

None

Max. Onboard DRAM

640KB

Cache

None

BIOS

AT&T

Dimensions

272mm x 254mm

I/O Options

Parallel port, serial ports (2), floppy drive interface

NPU Options

8087

SYSTEM BOARD CONNECTIONS

Purpose

Location

Purpose

Location

To CRT controller board at J9

J1

Serial port 2

J5

To CRT controller board at J11

J2

Keyboard

J6

Serial port 1

J3

Floppy drive

J7

Parallel port

J4

+/- 12V Power

P1

Note:Bus converter board and display enhancement board not shown.

SYSTEM BOARD USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Factory configured - do not alter

JA

N/A

Factory configured - do not alter

JB

N/A

Clock enabled

JC

Closed

 

Clock disabled

JC

Open

Factory configured - do not alter

JD

N/A

Clock battery enabled

JE

Closed

 

Clock battery disabled

JE

Open

NPU enabled

SW0/5

Off

 

NPU disabled

SW0/5

On

Serial interface select 8250

SW0/6

On

 

Serial interface select 8350

SW0/6

Off

BIOS type select 2732

SW0/8

On

 

BIOS type select 2764

SW0/8

Off

Disk drive select 96 TPI

SW1/1

Off

 

Disk drive select 48 TPI

SW1/1

On

Disk drive select fast start-up

SW1/2

Off

 

Disk drive select slow start-up

SW1/2

On

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

128KB

(9) 4164

(9) 4164

NONE

NONE

256KB

(9) 4164

(9) 4164

(9) 4164

(9) 4164

512KB

(9) 4464

(9) 4464

NONE

NONE

640KB

(9) 4164

(9) 4164

(9) 41256

(9) 41256

DRAM SWITCH CONFIGURATION

Size

SW0/1

SW0/2

SW0/3

SW0/4

128KB

Off

On

On

On

256KB

On

Off

On

On

512KB

On

On

Off

On

640KB

Off

On

Off

On

VIDEO CONFIGURATION

Size

SW1/5

SW1/6

80 columns

On

Off

40 columns

Off

On

HARD DRIVE CONFIGURATION

Setting

SW1/3

SW1/4

Enabled

Off

Off

Disabled

On

On

FLOPPY DRIVE CONFIGURATION

Drives installed

SW1/7

SW1/8

1

On

On

2

Off

On

CRT CONTROLLER BOARD CONNECTIONS

Purpose

Location

Purpose

Location

To bus converter board

J8

Monitor

J12

To system board at J1

J9

To display enhancement board

J13

To bus converter board

J10

+15V Power

P2

To system board at J2

J11

   

CRT CONTROLLER BOARD USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Oscillator select internal

JF

pins 2 & 3 closed

 

Oscillator select on display enhancement board

JF

pins 4 & 5 closed

Clock select internal

JF

pins 5 & 6 closed

 

Oscillator select 24MHz

JF

pins 1 & 2 closed