參數(shù)資料
型號: W83977CTF-PW
英文描述: PERIPHERAL (MULTIFUNCTION) CONTROLLER
中文描述: 周邊(多功能)控制器
文件頁數(shù): 43/161頁
文件大?。?/td> 592K
代理商: W83977CTF-PW
W83977EF/ CTF
PRELIMINARY
Publication Release Date: March 1999
-34 -
Revision A1
HEAD (Bit 3):
This bit indicates the complement of HEAD# output.
0
side 0
1
side 1
INDEX#(Bit 2):
This bit indicates the value of INDEX# output.
WP#(Bit 1):
0
1
disk is write-protected
disk is not write-protected
DIR (Bit 0)
This bit indicates the direction of head movement.
0
outward direction
1
inward direction
In PS/2 Model 30 mode, the bit definitions for this register are as follows:
1
2
3
4
5
6
7
0
WP
INDEX
HEAD#
TRAK0
STEP F/F
DRQ
INIT PENDING
DIR#
INIT PENDING (Bit 7):
This bit indicates the value of the floppy disk interrupt output.
DRQ (Bit 6):
This bit indicates the value of DRQ output pin.
STEP F/F (Bit 5):
This bit indicates the complement of latched STEP# output.
TRAK0 (Bit 4):
This bit indicates the complement of TRAK0# input.
HEAD# (Bit 3):
This bit indicates the value of HEAD# output.
0
side 1
1
side 0
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