PC87366 datasheet(58/240 Pages) NSC

부품명	PC87366

상세설명	128-Pin LPC SuperI/O with System Hardware Monitoring, MIDI and Game Ports

PDF	240 Pages

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제조업체	NSC [National Semiconductor (TI)]

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58 / 240 page

2.0 Device Architecture and Configuration (Continued)

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2.9.4

Drive ID Register

This read/write register is reset by hardware to 00h. This register controls bits 5 and 4 of the TDR register in the Enhanced

mode.

Location:

Index F1h

Type:

R/W

Usage Hints: Some BIOS implementations support automatic media sense FDDs, in which case bit 5 of the TDR register

in the Enhanced mode is interpreted as valid media sense when it is cleared to 0. If drive 0 and/or drive 1 do not support

automatic media sense, bits 1 and/or 3 of the Drive ID register should be set to 1 respectively (to indicate non-valid media

sense) when the corresponding drive is selected and the Drive ID bit is reflected on bit 5 of the TDR register in the Enhanced

mode.

Bit

76543210

Name

Reserved

Drive 1 ID

Drive 0 ID

Reset

00000000

Bit

Description

7-4

Reserved

3-2

Drive 1 ID. When drive 1 is accessed, these bits are reﬂected on bits 5-4 of the TDR register, respectively.

1-0

Drive 0 ID. When drive 0 is accessed, these bits are reﬂected on bits 5-4 of the TDR register, respectively.

PC87366 데이터시트(PDF) 58 Page - National Semiconductor (TI)