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SIO-II

SEALEVEL SYSTEMS, INC.

SIO-II

Card Type

Serial card

Chip Set

Unidentified

Maximum Onboard Memory

Unidentified

I/O Options

Serial port

Hard Drives supported

None

Floppy drives supported

None

Data Bus

8-bit ISA

Card Size

Half-length, full-height

CONNECTIONS

Function

Label

Serial Port 1

CN1

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

RS-485 enabled by RTS

E2

Closed

 

RS-485 always enabled

E2

Open

 

RS-232 with U7 & U11 installed

E5

Pins 2 & 3 closed

RS-422/485 with U6 & U7 installed

E5

Pins 2 & 3 closed

 

Current Loop with U6 & U7 installed

E5

Pins 1 & 2 closed

Note: For the RS-422, the RS-485, and the Current loop, the RS-422/485 driver/receiver pair are installed at U6 and U7. For the RS-232, U6 and U7 must be removed and the RS-232 driver/receiver pair are installed at locations U17 and U11.

BASE I/O ADDRESS SELECTION PORT 1

Setting

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

SW1/8

 

238h

On

Off

Off

Off

Off

Off

Off

Off

 

2B8h

Off

On

Off

Off

Off

Off

Off

Off

 

338h

Off

Off

On

Off

Off

Off

Off

Off

 

3B8h

Off

Off

Off

On

Off

Off

Off

Off

 

278h

Off

Off

Off

Off

On

Off

Off

Off

 

2F8h

Off

Off

Off

Off

Off

On

Off

Off

 

378h

Off

Off

Off

Off

Off

Off

On

Off

3F8h

Off

Off

Off

Off

Off

Off

Off

On

 

Disabled

Off

Off

Off

Off

Off

Off

Off

Off

SERIAL PORT 1 INTERRUPT SELECTION

IRQ

E1/Pins 1 & 2

E1/Pins 2 & 3

E9

 

IRQ3

Closed

Closed

Open

IRQ4

Open

Closed

Open

 

IRQ5

Open

Open

Closed

 

None

Open

Open

Open