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LAPC-1

ROLAND CORPORATION

LAPC-1

Card Type

Sound Card

Chipset/Controller

Roland

I/O Options

Line out, MIDI port, speaker jack

Maximum DRAM

N/A

CONNECTIONS

Purpose

Location

Purpose

Location

MIDI port

CN1

Line out (left)

CN3

Line out (right)

CN2

Speaker jack

CN4

I/O ADDRESS CONFIGURATION

Data Port Address

Command Port Address

J7

J8

330h (for Board 1)

331h

Pins 1 & 2 closed

Pins 1 & 2 closed

 

332h (for Board 2)

333h

Pins 1 & 2 closed

Pins 2 & 3 closed

 

334h (for Board 3)

335h

Pins 2 & 3 closed

Pins 1 & 2 closed

 

336h (for Board 4)

337h

Pins 2 & 3 closed

Pins 2 & 3 closed

Note:Multiple LAPC-1 cards in the same system can only function with software which is capable of controlling multiple MPU-401 interfaces.

INTERRUPT SELECT

IRQ

J1

J2

J3

J4

J5

J6

IRQ2

Closed

Open

Open

Open

Open

Open

 

IRQ3

Open

Open

Open

Open

Open

Closed

 

IRQ4

Open

Open

Open

Open

Closed

Open

 

IRQ5

Open

Open

Open

Closed

Open

Open

 

IRQ6

Open

Open

Closed

Open

Open

Open

 

IRQ7

Open

Closed

Open

Open

Open

Open

Note:These settings apply when all jumpers in the interrupt jumper block other than the one designated as closed are left open.