YMF721 datasheet(28/41 Pages) LSI

28 / 41 page

YMF721

July 10, 1997

- 28 -

Sub Command 01h : Get Processor Software Version

Version number of firmware stored in the internal processor is read out as shown below.

YMF704B(OPL4-ML) : Version 1.22

YMF704B(OPL4-ML) : Version 1.23

YMF704C(OPL4-ML) : Version 1.24

YMF721C(OPL4-ML2) : Version 2.00

Sub Command 02h : Get Processor Software Capacity

The capacity of internal processor can be known through the capacity code.

bit0 = 1 : The synthesizer is able to add effects such as reverb or chorus send level 1.

bit1 = 1 : Suspend/Resume is supported.

bit2 = 1 :Power down is supported.

YMF704B(OPL4-ML) : Capacity Code=01h

YMF704B(OPL4-ML) : Capacity Code=03h

YMF704C(OPL4-ML) : Capacity Code=03h

YMF721C(OPL4-ML2) : Capacity Code=07h

Command

Response

80h

Command byte

84h

Response 1st byte

01h

Sub Command

02h

Integer part of version number

7Fh

Check sum

00h

1st decimal place of version number

00h

2nd decimal place of version number

7Eh

Check sum

Command

Response

80h

Command byte

85h

Response 1st byte

02h

Sub Command

00h

No use

7Eh

Check sum

00h

No use

00h

No use

07h

Capacity code

79h

Check sum

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