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SAA7780 датащи(PDF) 39 Page - NXP Semiconductors |
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SAA7780 датащи(HTML) 39 Page - NXP Semiconductors |
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39 / 70 page ![]() ThunderBird Q3D PCI Audio SAA7780 Accelerator Philips Semiconductors Product Specification 1999 Sep 30 39 Thunderbird Base Address Register - Songbase (RW/RO) SAA7780 CFG Space 0 Legacy Base Address Registers The SAA7780 contains three legacy I/O base registers in configuration space 0. These legacy devices are the Sound Blaster register, the AdLib registers and the MIDI interface registers. They are described in detail in the next three tables. Sound Blaster Base Address - SBBASE (RW/RO) PCI CFG 0 D31 D30 D29 D28 D27 D26 D25 D24 Offset 10h SONGBASE[31:24] POR Value 0 0 0 0 0 0 0 0 D23 D22 D21 D20 D19 D18 D17 D16 SONGBASE[23:16] POR Value 0 0 0 0 0 0 0 0 D15 D14 D13 D12 D11 D10 D9 D8 SONGBASE[15:8] POR Value 0 0 0 0 0 0 0 0 D7 D6 D5 D4 D3 D2 D1 D0 SONG BASE[7] R R R R R R IO POR Value 0 0 0 0 0 0 0 1 Bit Name R/W Function 31:7 SONGBASE RW Thunderbird non-legacy device base address register. This register supplies the I/O base address for the non-legacy I/O devices within the SAA7780 chip. 6:1 R RO Reserved. These bits are reserved a must always return a zero for plug and play. 0 IO RO I/O flag. This read only bit indicates that this is an I/O range. PCI CFG 0 D31 D30 D29 D28 D27 D26 D25 D24 Offset 14h SBBASE[31:24] POR Value 0 0 0 0 0 0 0 0 |
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