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YMF721 Datasheet(PDF) 28 Page - LSI Computer Systems |
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YMF721 Datasheet(HTML) 28 Page - LSI Computer Systems |
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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