ATA20 White Electronic Designs Corporation, ATA20 Datasheet - Page 30

• Manufacturer Part Number: ATA20
• Description: Density = 8MB-160MB ;; Memory Device = Hitachi Flash ;; Organization = X16/x8 ;; Speed (ns) = 250 ;; Volt = 3/5
• Manufacturer: White Electronic Designs Corporation

June 2000 Rev. 5 – ECO #12935
Task File Register Specification
These registers are used for reading and writing the storage data in this card. These registers are mapped
four types by the configuration of INDEX in the Configuration Option register. The decoded addresses are
shown as follows.
Memory Map (INDEX = 0)
-REG A10
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
7PxxxATA20xxC25
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
A9 to A4 A3
0
0
0
0
0
0
0
0
1
1
1
1
1
A2
0
0
0
0
1
1
1
1
0
0
1
1
1
A1
0
0
1
1
0
0
1
1
0
0
0
1
1
A0
0
1
0
1
0
1
0
1
0
1
1
0
1
0
1
Offset
0H
1H
2H
3H
4H
5H
6H
7H
8H
9H
DH
EH
FH
8H
9H
30
-OE = L
Data register
Error register
Sector count register
Sector number register Sector number register
Cylinder low register
Cylinder high register
Drive head register
Status register
Dup. even data register Dup. even data register
Dup. odd data register
Dup. error register
Alt. status register
Drive address register
Even data register
Odd data register
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-WE = L
Data register
Feature register
Sector count register
Cylinder low register
Cylinder high register
Drive head register
Command register
Dup. odd data register
Dup. feature register
Device control register
Reserved
Even data register
Odd data register