Roland FC-300 Bedienungsanleitung PDF herunterladen (Seite 59)

PÉDALIER MIDI

Model FC-300

Apr. 1, 2007

Version 1.00

Equipement MIDI

(en anglais)

Roland’s MIDI implementation uses the following data format for all

Exclusive messages (type IV):

MIDI status: F0H, F7H

An Exclusive message must be flanked by a pair of status codes, star-

ting with a Manufacturer ID immediately after F0H (MIDI version

1.0).

Manufacturer ID: 41H

The Manufacturer ID identifies the manufacturer of a MIDI instru-

ment that sends an System Exclusive message. Value 41H represents

Roland’s Manufacturer ID.

Device ID: DEV

The Device ID contains a unique value that identifies individual devi-

ces in the implementation of several MIDI instruments.

It is usually set to 00H–0FH, a value smaller by one than that of a basic

channel, but value 00H–1FH may be used for a device with several

basic channels.

Model ID: MDL

The Model ID contains a value that identifies one model from another.

Different models, however, may share an identical Model ID if they

handle similar data.

The Model ID format may contain 00H in one or more places to pro-

vide an extended data field.

The following are examples of valid Model IDs, each representing a

unique model:

01H

02H

03H

00H, 01H

00H, 02H

00H, 00H, 01H

Command ID: CMD

The Command ID indicates the function of an Exclusive message.

The Command ID format may contain 00H in one or more places to

provide an extended data field.

The following are examples of valid Command IDs, each representing

a unique function:

01H

02H

03H

00H, 01H

00H, 02H

00H, 00H, 01H

Main data: BODY

This field contains a message to be exchanged across an interface.

The exact data size and content will vary with the Model ID and Com-

mand ID.

Address mapping is a technique for transferring messages confor-

ming to the data format given in Section 1.

It assigns a series of memory-resident records–waveform and tone

data, switch status, and parameters, for example, to specific locations

in a machine-dependent address space, thereby allowing access to

data residing at the address a message specifies.

Address-mapped data transfer is therefore independent of models

and data categories.

This technique allows use of two different transfer procedures: one-

way transfer and handshake transfer.

One-way transfer procedure

(See Section 3 for details.)

This procedure is suited to the transfer of a small amount of data.

It sends out an Exclusive message completely independent of the

receiving device’s status.

fig.Connection-Diagram1.eps

Connection at point 2 is essential for “Request data” procedures. (See

Section 3.)

Roland System Exclusive

Messages

1. Data Format for Exclusive

Messages

Byte Description

F0H System Exclusive Status

41H Manufacturer ID (Roland)

DEV Device ID

MDL Model ID

CMD Command ID

[BODY] Main data

F7H EOX (End of System Exclusive)

2. Address-mapped Data Transfer

Device (B)

MIDI IN

MIDI OUT

Device (A)

MIDI OUT

MIDI IN

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