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ACB-IV

SEA LEVEL SYSTEMS, INC.

ACB-IV

Card Type

Serial card

Chip Set

Unidentified

I/O Options

Serial port

Data Bus

8-bit ISA

CONNECTIONS

Function

Label

Serial port

P1

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured do not alter

E4

Unidentified

Factory configured do not alter

E6

Unidentified

Factory configured do not alter

E7

Unidentified

Factory configured do not alter

E9

Unidentified

Factory configured do not alter

E10

Unidentified

Factory configured do not alter

SW2

Unidentified

SERIAL PORT 1 SELECTION

Setting

E2

Enabled (RS-485 only)

Pins 1 & 2 closed

Transmit clock input (TXC in on pins 12 & 15 of P1)

Pins 3 & 4 closed

Transmit clock output (TXC out on pins 12 & 15 of P1)

Pins 5 & 6 closed

Receive clock input (RXC in on pins 9 & 17)

Pins 7 & 8 closed

Not used

Pins 9 & 10 open

Transmit clock output (TXC out on pins 12 & 15 of P1)

Pins 11 & 12 closed

Transmit clock output (TXC out on pins 12 & 15 of P1)

Pins 13 & 14 closed

Not used

Pins 15 & 16 open

Not used

Pins 17 & 18 open

SERIAL PORT 2 SELECTION

Setting

E1

Enabled (RS-485 only)

Pins 1 & 2 closed

Transmit clock input (TXC in on pins 12 & 15 of P1)

Pins 3 & 4 closed

Transmit clock output (TXC out on pins 12 & 15 of P1)

Pins 5 & 6 closed

Receive clock input (RXC in on pins 9 & 17)

Pins 7 & 8 closed

Not used

Pins 9 & 10 open

Transmit clock output (TXC out on pins 12 & 15 of P1)

Pins 11 & 12 closed

Transmit clock output (TXC out on pins 12 & 15 of P1)

Pins 13 & 14 closed

Not used

Pins 15 & 16 open

Not used

Pins 17 & 18 open

SERIAL PORT INTERRUPT SELECTION

IRQ

E8

2/9

Pins 1 & 2 closed

3

Pins 3 & 4 closed

4

Pins 5 & 6 closed

5

Pins 7 & 8 closed

Normal IRQ mode

Pins 9 & 10 closed

Multi IRQ mode

Pins 11 & 12 closed

BASE I/O ADDRESS SELECTION

Setting

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

238

Off

On

On

On

Off

Off

Off

280

Off

On

Off

On

On

On

On

2A0

Off

On

Off

On

Off

On

On

2E8

Off

On

Off

Off

Off

On

Off

300

Off

Off

On

On

On

On

On

328

Off

Off

On

On

Off

On

Off

3E8

Off

Off

Off

Off

Off

On

Off

DMA CHANNEL SELECTION

Channel

E3

1 two channel mode

Pins 1 & 2 closed

3 two channel mode

Pins 1 & 2 closed

Two channel A/B mode A3B1

Pins 3 & 4 closed

Two channel A/B mode A1B3

Pins 5 & 6 closed

Closed = channel A, Open = channel B

Pins 7 & 8 closed

3 acknowledges channel 3

Pins 9 & 10 closed

1 acknowledges channel 1

Pins 11 & 12 closed

DMA SELECTION

Setting

E5

SCC channel A/B uses channel 3

Pins 1 & 2 closed

SCC channel A uses channel 3

Pins 3 & 4 closed

SCC channel A/B uses channel 1

Pins 5 & 6 closed

SCC channel A uses channel 3

Pins 7 & 8 closed

SCC channel B enabled for half duplex DMA transfers

Pins 9 & 10 closed

SCC channel A DMA channel 1/3 for full duplex transfers

Pins 11 & 12 closed

DMA tri state drivers permanently enabled

Pins 13 & 14 closed

DMA tri state drivers enabled by status control port bit 7

Pins 15 & 16 closed