I think that's the port for diagnostics machine.
I know it's for something garages use to run tests. (Atleast that's what I've been told).

Ahhhh i see cheers 

     HI-SCAN PRO
           
«Hi-scan Pro» is a professional OEM scan tool equipment for HYUNDAI and KIA cars. Scan tool consists of the main body with LCD display, PCMCIA software card slot, built in multimeter, inpulse generator and 2channel oscilloscope.

All HYUNDAI and KIA vehicles could be tested
OBD-II (ISO 9141-2)
OBD-II (SAE-J1850)
KWP-2000

Systems

All vehicle electronic parts and electrical systems:
ENG, ENG-2, BM/GM, EA, CCS, TCS, ISC, ESCM, IFI/ERE, ELR, EDS, ABS/ETS/ASR, AIRBAG/ETR (SRS), A/T, BAS, ADS, ASD, SPS, 4WD, RB, RST, A/C, IMMO, EPS, ECS, AHLS, AAC, FWDS, FFH, KCS.

Functions

Scan tool fucntion:
DTC reading and explaination.
DTC erasing.
Live time Current Data(in digits and in graphic modes.
Manual data item grouping on display.
Actuation test.
Item graphic veiw.
Electrical scheme view.
Current data recording function.
Sensor simulation mode.
System Identification(ECU number).
Adaptation function.
Service reset function.
Immobilizer reading and programming.
Trouble shooting function.
ECU re-programming.

Tool Box function:
2-channel oscilloscope with possibility of manual or automatic .
Разрешение по напряжению: 0,2V ~ 50V.
Разрешение временной развертки: 0,020mS ~ 50 sec.
Скорость обмена: 1 Мб графики/сек. (1Mb sample/sec).
2channel multimeter(digital and graphic view function possible).
Voltage, frequency, duty, current, ommeter, temperature, vacuum and pressure measuring possiblity.
Maximum and minimum items.
Voltage: ±500V max.
Изменение скважности сигналов (0 - 99.9%).
Trigger Возможность настройки триггера.
Источник: 5 режимов.
Level: 0 - 100%.
Delay: 0 - 100%.
Ignition testing (primary and secondary ignition).
Maximum voltage - 100 kV.
Cylinder power balance measuring (with optional Current Pick ups).
Low current: 50mA ~ 100A.
High current: 1A ~ 600A.
Возможность сохранения в энергонезависимой памяти прибора осциллограмм в каждом режиме.
Фиксирование изображения на выбранном моменте, приближение, удаление, запись, обработка.
Возможность формирования пользовательской библиотеки измерений (свыше 20 банков памяти).
«Hot Help» по проверяемому датчику или исполнительному элементу (назначение, возможные типы, принципы функционирования, порядок подключения, места расположения, методика проверки, типовые осциллограммы и т.д.).

Impulse generator:
Frequency: 1 - 100 Hz (period 1 s - 10.00 мs)
Duty: 1 - 100%

Additional

Возможность подключения к стандартному компьютеру
Возможность подключения оборудования через разъем USB
Built-in HP printer drivers
Universal power source(AC/DC)

Specification

Processor: 16 bit Intel 80C196 20MHz
RAM: 128kB
Card (PCMCIA): 16Мb каждый
Extra card(PCMCIA): 32Мb
Display: LCD 320х240
РС connection: RS-232C
Main module weight: 1.2 кг
Body color: dark grey
Rubber shroud color: red for KIA, yellow for HYUNDAI
Power: 8 ~ 16V DC

Set composition

Basic set:
Main body
Rubber Shroud
16pin OBD-II DLC cable
HYUNDAI 12 pin adapter
or KIA 6+1 pin adapter
KIA 20 pin black adapter
KIA 20 pin red adapter
Cigar lighter power adapter
Battery power adapter
Scope pick up set»
Manual
PCMCIA card with program(KIA or Hyundai)
PC cable RS-232C
CD with download program
Plastic Case

Hyundai set (опционально)
PCMCIA program card (16 Mb Hyundai)
HYUNDAI adapter 16-12 pin
ECU re-program kit

KIA set (опционально)
PCMCIA program card (16 Mb KIA)
Adapter KIA (6+1 pin)
Adapter KIA (20 pin) x 2pcs
ECU re-program kit
Trouble shooting pack

OEM dealer kit (option)
PCMCIA card with Trouble shooting information KIA (32 Mb)
CD with download program
Manual
ECU re-program kit

Option kits
Vacuum and pressure pick up
Temperature meter
High current pick up (1А - 600А)
Low current pick up (50мА - 100А)
Secondary Ignition Pick up
Option memory card (32Mb)
Battery set
OEM printer
Printer cartrige
Printer paper