Specifications

II-60 EPSON S1C62N82 TECHNICAL SOFTWARE

CHAPTER 3: PERIPHERAL CIRCUITS (Melody Generator)

(3) Retrigger play

In this mode, the melody can be stopped anywhere dur-

ing playing, and it can be set to any another melody. The

control procedure is as follows:

With this function, the user can force the melody to stop

if there is a rest note with the End data = "1" in the

melody ROM (See melody ROM data setting).

MELC

MO Melody 1

Melody 1 stopped mid-way Interrupt generate by END data setting

Melody n

Fig. 3.11.4

Control procedure of

retriggrer play mode

Set melody n address

Set MELC bit to "1"

Set MELC bit to "0"

Jump to

melody subroutine

Melody n end

interrupt

10AH

Melody subroutine

RET

Set MELD bit to "0"

Set MELC bit to "1"

Set MELC bit to "0"

Enable interrupt

Mid-way of

melody 1

Start of

melody n

Set melody address