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APC IV SERIES (G9YAN)

NEC TECHNOLOGIES, INC.

APC IV SERIES (G9YAN)

Processor

80286 (exact location unidentified)

Processor Speed

6/8MHz

Chip Set

Unidentified

Maximum Onboard Memory

10MB (on external memory cards)

Cache

None

BIOS

Unidentified

Dimensions

355mm x 305mm

I/O Options

Floppy drive interface, parallel port, serial ports (2)

NPU Options

80287 (exact location unidentified)

CONNECTIONS

Function

Label

Function

Label

Serial port 1

COM1

Indicator panel

P4

Serial port 2

COM2

Parallel port

P5

Speaker

P1

Floppy drive interface

P9

External battery

P3

Indicator panel

P10

USER CONFIGURABLE SETTINGS

Setting

Label

Position

»

ROM area reserved on I/O channel

5N2

Pins 3 & 6, 4 & 5 closed

 

APC IV ROM at location 4K, 4M enabled

5N2

Pins 1 & 8, 2 & 7 closed

»

BIOS type select 27256

6N1

Pins 3 & 6, 4 & 5 closed

 

BIOS type select 27128

6N1

Pins 1 & 8, 2 & 7 closed

»

Factory configured - do not alter

14D/3

Off

»

Parallel port enabled

14D/4

On

 

Parallel port disabled

14D/4

Off

»

Serial port channel 1 enabled

14D/5

On

 

Serial port channel 1 disabled

14D/5

Off

»

Serial port channel 2 enabled

14D/6

On

 

Serial port channel 2 disabled

14D/6

Off

»

Channel 1 = COM1/channel 2 = COM2

14D/7

On

 

Channel 1 = COM2/channel 2 = COM1

14D/7

Off

»

Monitor type select color

14D/10

On

 

Monitor type select monochrome

14D/10

Off

»

Factory configured - do not alter

21D/1

On

»

Factory configured - do not alter

21D/2

On

»

Factory configured - do not alter

21D/3

On

»

Factory configured - do not alter

21D/4

On

»

Factory configured - do not alter

21D/5

On

»

ROM type select IBM

21D/6

On

 

ROM type select APC

21D/6

Off

DRAM

Note: The orientation and location of the DRAM is unidentified.

DRAM JUMPER

Bank 0

Bank 0

18K2

256KB

64KB

Pins 3 & 4 closed

256KB

None

Pins 1 & 2 closed

256KB

256KB

Open

SERIAL PORT

Setting

14D/1

14D/2

14D/8

14D/9

RS-232 enabled

On

Off

On

Off

RS-232 disabled

Off

On

Off

On

I/O WAIT

Setting

22H1

Normal operation 8-bit I/O cycle with 4 waits

Pins 3 & 10, 4 & 9 closed

3 wait I/O cycle with I/O address between 000 & 0FF.

Pins 2 & 11, 4 & 9 closed

2 wait I/O cycle with I/O address between 000 & 0FF.

Pins 3 & 10, 5 & 8 closed

Note: Pins 6 & 7 open for normal operation. Close only for early detection or RAS & ALE signals. Pins 1 & 12 open for normal operation (1 wait state). Close only for 0 wait states.

DRAM

Note: The orientation and chip sizes are unidentified.

MEMORY CARD SWITCHES

Expansion cards installed

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

1

Off

Off

Off

On

Off

2

Off

Off

On

On

Off

3

Off

On

Off

On

Off

4

Off

On

On

On

Off

5

On

Off

Off

On

Off

MEMORY CARD SWITCHES (CON’T)

Expansion cards installed

SW1/6

SW1/7

SW1/8

SW1/9

SW1/10

1

Off

Off

Off

On

On

2

Off

Off

On

On

On

3

Off

On

Off

On

On

4

Off

On

On

On

On

5

On

Off

Off

On

On

MEMORY CARD SWITCHES (CON’T)

Expansion cards installed

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

1

Off

Off

On

Off

Off

2

Off

On

Off

Off

Off

3

Off

On

On

Off

Off

4

On

Off

Off

Off

Off

5

On

Off

On

Off

Off

MEMORY CARD SWITCHES (CON’T)

Expansion cards installed

SW2/6

SW2/7

SW2/8

SW2/9

SW2/10

1

Off

Off

On

Off

On

2

Off

On

Off

Off

On

3

Off

On

On

Off

On

4

On

Off

Off

Off

On

5

On

Off

On

Off

On

MISCELLANEOUS TECHNICAL NOTE

The location of pin 1 on all jumpers is unidentified.