Datasheet

Drive/Head 006 Read H X L L H H H Invalid Drv/Hd
Write H X L H L H H Invalid Drv/Hd
Status 007 Read H L L L H H H Invalid Status
H H H L H H H Status Invalid
Command Write H L L H L H H Invalid
Command
H H H H L H H
Command
Invalid
Data (duplicate) 008 Read H L L L H H H
Data High Data Low
(see note 3) H H L L H H H Invalid Data
Write H L L H L H H
Data High Data Low
H H L H L H H Invalid Data
009 Read H H L L H H H Invalid
Data High
H L H L H H H
Data High
Invalid
Write H H L H L H H Invalid
Data High
H L H H L H H
Data High
Invalid
Invalid
00A-00C
H X X X H X X Invalid Invalid
Error 00D Read H H L L H H H Invalid Error
(duplicate) H L H L H H H Error Invalid
Write H H L H L H H Invalid Feature
H L H H L H H Feature Invalid
Alternate Status 00E Read H X L L H H H Invalid
Alt. Status
Drive Control Write H X L H L H H Invalid Control
Drive Address 00F Read H H L L H H H Invalid
Drv. Add.
H L H L H H H Drv. Add Invalid
Write H H L H L H H Invalid Not Used
H L H H L H H Not Used Invalid
Data (duplicate)
400-7FF
Read H L L L H H H
Data High Data Low
(see note 3) Write H L L H L H H
Data High Data Low
1 X = don’t care
2 The host must must decode addresses All and above to provide card enables CE1# and CE2# that place the drive
on a 2-K byte Boundary The drive decodes A0-10
3 In independent memory mode, each byte access to 000, 008, or even addresses 400-7FE presents a new data-
buffer byte on Do-7 starting with the first buffer word’s low byte Each word access presents sequential data
buffer words on D0-15 Byte access to 009 or odd addresses401-7FF present high byte buffer data on D0-7 or D8-
15 depending on CDE1# and CE2#