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- D C a
DCl
DC2
DC3
i.
DC4
0000
0001 0010
0011 0100
CD
00 CD 01
02
03
04
00
SFU
SFL
SRU
10
11
12
13
14
01
SZE
RLS
RCB
SSS
SLS
20
21
22
23
24
10
HIU
HIL
CIU
CIL
API
@30
®
31 ®32 ®33 ®34
11
RD
RD
ncR
DIFF
DIFF
UPPER IaiER ID-OP
CNl'R
OO-OP
loutput Info Xfer!
SFU - Seek Forward-Upper
SFL - Seek Forward-Lower
SRU - Seek Reverse-Upper
SRL - Seek Reverse-Lower
DCs
0101
0110
0111 1000
05
06
07
08
SRL
COU
COL
HOU
15
16
17
18
ROM
~
~
SPO
25
26
27
28
ROX
DNR
DTR
SSR
®35 ® 36 ®37 ®38
WRl'
TEST
OO-OP to-QP ro-QP
am:K
I
Control
I
SZE - Seize Device
RLS - Release Device
RCB - Reca1ibrate
SSS - Set Standby State
SLS·- Set Local State
RDM - Reset Diag. Mode
1001 1010
09 CDoA
HOL
19
1A
SPI
ARC
29
2A
DS1
DS2
CD
39 ®3A
WRr
TEST
COU - Cyl. Out-Upper
COL - ey1. Out-Lower
BOU - Hd Addr Out-Upper
HOL - Hd Addr Out-Lower
RTC - Return to Track Centerline
WRT - Write
NOTES:
(!)
Invalid commands.
SPO - Shift Posit. Out
SPI - Shift Posit. In
ARC - Adv. Read Clock
RRC - Ret. Read Clock
SDM - Set
Diagnosti~
Mode
SDE - Set Diagnostic
~pe
GD
Valid only durinq set diagnostic
escape mode
~Valid
(No-op)
1011 1100
1101
1110
<D
OB (DOC <DOD
CD
OE
IB
lC
10
1E
RRC
~
~
SDM
2B
2C
20
2E
DS3
DS4
DS5
DS6
®
3B <D3C
3D
3E
nc
DIFF
CNl'R
1m:
RDH
IInput Info Xfer!
HIU - Hd Addr-Upper
BIL - Hd Addr-Lower
1111
OF
WRT
IF
SDE
2F
DS7
3F
DS8
CIU - Cyl. Addr In-Upper
CIL - Cyl. Addr In-Lower
API - Ang. POSe In
RDX - Read
DNR - Device Number Request
DTR - Device Type Request
SSR - Sum. Stat. Req.
DS1 - Det. Stat. Req.-Byte 1
DS2 - Det. Stat. Req.-Byte 2
DS3 - Det. Stat. Req.-Byte 3
DS4 - Det. Stat. Req.-Byte 4
DSS - Det. Stat. Req.-Byte 5
DS6
Det. Stat. Req.-Byte 6
DS7 - Det. Stat. Req.-Byte 7
DS8 - Det. Stat. Req.-Byte 8
RDH - Read Header
7M83
Figure 3-16.
Command Decodes & Abbreviations
83318200
A
3-23
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