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MODEL 189370/199720

TANDON CORPORATION

MODEL 189370/199720

Processor

80286

Processor Speed

6/8/10MHz

Chip Set

Unidentified

Maximum Onboard Memory

3MB (2.5MB on external memory card)

Cache

None

BIOS

Unidentified

Dimensions

355mm x 305mm

I/O Options

Serial port, parallel port

NPU Options

80287

CONNECTIONS

Function

Label

Function

Label

Serial port

CN1

Parallel port

CN2

USER CONFIGURABLE SETTINGS

Setting

Label

Position

 

Signal select DTR driven

JP1

Pins 1 & 2 closed

 

Signal select DTR true

JP1

Pins 2 & 3 closed

 

Signal select DTR false

JP1

Open

 

Signal select RTS driven

JP2

Pins 1 & 2 closed

 

Signal select RTS true

JP2

Pins 2 & 3 closed

 

Signal select RTS false

JP2

Open

 

Signal select DCD driven

JP3

Pins 1 & 2 closed

 

Signal select DCD true

JP3

Pins 2 & 3 closed

 

Signal select DCD false

JP3

Open

 

Signal select DSR driven

JP4

Pins 1 & 2 closed

 

Signal select DSR true

JP4

Pins 2 & 3 closed

 

Signal select DSR false

JP4

Open

 

Signal select CTS driven

JP5

Pins 1 & 2 closed

 

Signal select CTS true

JP5

Pins 2 & 3 closed

 

Signal select CTS false

JP5

Open

»

Factory configured - do not alter (189370-001, 002)

JP6

Open

»

Factory configured - do not alter (189370-004, 005/199270)

JP6

Open

»

Factory configured - do not alter (189370-001, 002)

JP7

Open

»

Factory configured - do not alter (189370-004, 005/199270

JP7

Pins 1 & 2 closed

»

Factory configured - do not alter (189370-001, 002)

JP8

Pins 2 & 3 closed

»

Factory configured - do not alter (189370-004, 005/199270)

JP8

Pins 1 & 2 closed

»

Factory configured - do not alter (189370-001, 002)

JP9

Pins 2 & 3 closed

»

Factory configured - do not alter (189370-004, 005/199270)

JP9

Pins 1 & 2 closed

»

Factory configured - do not alter (189370-001, 002)

JP10

Pins 1 & 2 closed

»

Factory configured - do not alter (189370-004, 005/199270)

JP10

Open

»

Factory configured - do not alter (189370-001, 002)

JP11

Pins 1 & 2 closed

»

Factory configured - do not alter (189370-004, 005/199270)

JP11

Pins 1 & 2 closed

»

Factory configured - do not alter (189370-001, 002)

JP12

Open

»

Factory configured - do not alter (189370-004, 005/199270)

JP12

Open

»

Factory configured - do not alter (189370-001, 002)

JP13

Pins 1 & 2 closed

»

Factory configured - do not alter (189370-004, 005/199270)

JP13

Pins 1 & 2 closed

»

Factory configured - do not alter (189370-001, 002)

JP14

Pins 2 & 3 closed

»

Factory configured - do not alter (189370-004, 005/199270)

JP14

Pins 1 & 2 closed

 

0 wait state enabled (model 199720 only)

SW1/1

On

 

0 wait state disabled (model 199720 only)

SW1/1

Off

»

Factory configured - do not alter

SW1/2

N/A

»

Video type select 80 characters

SW1/3

Off

»

Factory configured - do not alter

SW1/4

Off

USER CONFIGURABLE SETTINGS (CON’T)

Setting

Label

Position

»

Factory configured - do not alter

SW1/5

N/A

»

Factory configured - do not alter

SW1/6

N/A

»

Factory configured - do not alter

SW1/7

N/A

 

512KB - 640KB RAM address enabled

SW1/8

On

 

512KB - 640KB RAM address disabled

SW1/8

Off

DRAM

Note: The orientation and chip sizes are unidentified.

DRAM

Size

Bank 0

Bank 1

Bank 2

Bank 3

512KB

(18) 41256

None

None

None

1MB

(18) 41256

(18) 41256

None

None

1.5MB

(18) 41256

(18) 41256

(18) 41256

None

2MB

(18) 41256

(18) 41256

(18) 41256

(18) 41256

DRAM SWITCH

Memory before

Memory after

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

512-640KB

2560-2688KB

Off

Off

Off

On

Off

1024KB

3072KB

Off

Off

Off

On

On

2560-2688KB

4608-4736KB

Off

Off

On

On

Off

3072KB

5120KB

Off

Off

On

On

On

4608-4736KB

6656-6784KB

Off

On

Off

On

Off

5120KB

7168KB

Off

On

Off

On

On

656-6784KB

8704-8832KB

Off

On

On

On

Off

7168KB

9216KB

Off

On

On

On

On

DRAM SWITCH (CON’T)

Memory before

Memory after

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

8704-8832KB

10752-10880KB

On

Off

Off

On

Off

9216KB

11264KB

On

Off

Off

On

On

10752-10880KB

12800-12928KB

On

Off

On

On

Off

11264KB

13312KB

On

Off

On

On

On

12800-12928KB

14848-14976KB

On

On

Off

On

Off

13312KB

15360KB

On

On

Off

On

On

14848-14976KB

15744KB

On

On

On

On

Off

15360KB

15744KB

On

On

On

On

On

MISCELLANEOUS TECHNICAL NOTE

The location of pin 1 is unidentified.