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VT8231 Datasheet(PDF) 123 Page - List of Unclassifed Manufacturers |
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VT8231 Datasheet(HTML) 123 Page - List of Unclassifed Manufacturers |
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123 / 132 page  VT8231 Preliminary Revision 0.8 October 29, 1999 -117- Function 5 & 6 Registers - AC97 Audio & Modem Codecs 7HFKQRORJLHV ,QF :H &RQQHFW :H &RQQHFW Function 5 I/O Base 1 Registers –Audio FM NMI Status I/O Offset 0 – FM NMI Status ..........................................RO 7-2 Reserved ........................................ always reads 0 1-0 FM NMI Status 00 Undefined 01 OPL3 Bank 0 10 OPL3 Bank 1 11 Undefined I/O Offset 1 – FM NMI Data.............................................RO 7-0 FM NMI Data This register allows readback of the data written to the FM data port I/O Offset 2 – FM NMI Index ...........................................RO 7-0 FM NMI Index This register allows readback of the data written to the FM index port Function 5 I/O Base 2 Registers –MIDI / Game Port I/O Offset 1-0 – MIDI Port Base ..................................... RW 15-0 MIDI Port Base Address.................. default = 0330h This register is functional only if Rx42[7] = 1 I/O Offset 3-2 – Game Port Base ..................................... RW 15-0 Game Port Base Address ................. default = 0200h |
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