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-
M Z-5600A
3)-2. Dual Buffer
DMA shall be
transferred regardless
of the disk transfer
rate.
The
hardware of
the host
shall become Japanese
.
Host
cycle-steal
and prior
interruption.
In a multi-sector mode, process efficiency
decreases.
(e.g .) READ DATA
(DISK~
HOST)
DISK
transfer rate
5 Mbit/s
(1.6us/Byte)
HOST
transfer
rate 3,2J.Ls/Byte
UUF
0
tiEUTOR IllATA
IUISK
- HUFO
SECTOR I
DATA
BUFU
-
UOti'l'
tiECTOH
2
UATA
DISK
- HUF
I
I
tiEC1'0H4
tiEC'I'OR3 DATA
I UltiK
- HUFO
SECTOR3
DATA
SEU'I'OR
2
UATA
DUF
1-
IIOS
T
DUFO
-UOST
SECTOR
4
DATA
DISK
- BUF I
4) INTER FACE SINGNALS
D0-7
A0-2
A3-15
READ/
WRIT
E/
CS/
DIR
DRQ/
M-READ/
M-wRITE/
HRQ
HLDA
ADR-E
DM.EM
PHASED
/
TIME-{)UT
ATN
CHOEXC/
CLKO
CLK
I
RE
ST/
VDD
~
E
L _
ND
C
840
RD
DDO
WO
I
R
C
DD7
AM.EO
AOO
AMEI
I
A02
I
DXP
A03
R
DY
I
l'LT
A
1
5
SK
C
RED
TRK
O
WRT
SELD
C
S
DIR
DD
IR
STEP
ORQ
MSTP
MR
ED
RWC
MWRT
HDSI
HRQ
HDS2
HLDA
HDS3
ADRE
HDS4
DRSI
DMEM
DRS2
DRS3
PHAS
DRS4
T IMO
AMWT
ATN
AMFD
R
O
CHO
E
WO
SECR
WPRT
TAOI
TA02
CLKO
TA03
C
LKI
TA04
REST
svc
VDD
vss
VDD
VSS
~
READ-DATA(READ-0)
WRI
TE-DATA(WR
fT
E-0
)
READ- CLK(READ-
C
)
~~-ENADLEO
(
B-STBO
)
AM-ENA
8L
E1
(
8-STDI
)
IN
DEX(
INDEX
)
READY(READY
)
WRITE
FAULT(FAULT)
SEEK
COMPLETE(tiEEK-
END
)
TRACK 00
(ON
-
CL Y)
DRIVE
SELECTED(
SELECTED
)
DIRECTION/
ECC
WRITE
STEP
( S
EEK
ER
J
MI
CRO-STEP(
89
)
REDUCE-WC (D8
)
HEAD SEL 2' (DO)
HEADSEL 2'
(
DJ
)
HEAD SEL
2
'
(
82)
HEADSEL 2' (D3)
DRIVESEL
I
(
D4
)
DR
I
VESEL2
(
85
)
DRIV
ESEL3
(
D6
)
DRIVE
SEL 4
(
D7
)
AM
WRIT
E
AM
FOUND
(AM
FOUND
)
READ OATE
WRIT
E OATE
SECTOR
WRIT
E PROTECT
TAO I
(
TAO I
)
TAO 2
(TAO 2)
TAO
3
(TAO 3
)
TAO 4
(
TAO 4
)
(
SERVO
)
VSS
*
Signals
in
parentheses are used
for
SMD 1/F.
-
16
-
4) -1. Floppy Interface
NDC840
AM-ENABLED
AM-FOUND
NRZ
-R
EAD
-
DATA
READ
-
GATE
READ-CLK
NRZ
-W
R
IT
E
-
DATA
w~
g~
-
AM-WRITE
WRIT
E
-
GATE
HOC
READY
WRITE
-
FAULT
S
EEK-CO
MP
LETE
TRACKO
DRIVE-
SELECTED
I
NDEX
DIRECTION
STEP
REDUCE
-W-
CURRENT
HEAD-SEL 2°
HEAD-SE
L
2
1
HEAD-
SEL 2
2
DRIVE
-
SEL
l
DRIVE-SEL2
DR
IV
E
-
SE
L8
DRIV
E
-
SE
L4
4)-2. SMD Interface
NRZ-R
EAD-DATA
R
EAD
-
C
LK
S
ERVO
-
C
LK
I
I
NDEX
I
NDC842
AM
-
DETECT
DATA
-
SEPARATOR
(
UFO
)
--
------
WR
I
TE
-PRECOMP
MFM-
GEN
..----
R
E
c
E
I
V
E
R
~
r---
D
R
I
V
E
R
' - -
r---
D
R
I
V
E
R
~
r -
r---
r--
f---
MFM
-READ-DATA
MFM-W
RIT
E
-
DATA
WRITE-GATE
WRI
TE-FA ULT
SEEK-CCI\IPLETE
TRAC KO
DR
IV
E-SELECTED
I
NDEX
DIRECTION-I
STEP
REDUCE-W-CURRENT
HEAD-
SEL2o
HEAD-SEL2
1
HEAD-SEL22
DRIVE-SELl
DRIVE-SEL2
DRIVE-SEL3
OR
JVE-
SEL4
R
E
1 - - -
R
EAD
-
D ATA
LK
C
LK
c
1 - - -
HEAD-
C
E
1 - - -
SERVO-
I
V
1 - - -
I
NDEX
E
R
SEC
TOR
~~
I - - -
S
EC
TOR
f - - -
WRIT
E
-
C
LK
DATA
NRZ-WR
I
TE-DATA
TAG
I
TAG
2
TAG
3
UN
I
'!'-
S
ELE
CT- TAG
BUS-STBO
BO
)
89
BUS-STB
J
READY
FAULT
SEEKER
WPRT
SELEC
TED
ONC
YL
AM
FOUND
HO
C
D
f - - -
WRITE-
R
I
f - - -
TAG
I
V
f - - -
TAG2
E
f - - -
TAG3
R
r - -
UN
IT-
S
' - -
r -
-
L
t--
D
-
A
t-
R
-
I
-
T
V
-
c
E
-
R
H
f--
f - -
~
~
f--
f--
A
R
V
f--
T
E
c
IR
.....!!._
~
,.---
D
f--
R
'--
I
f--
' - -
V
f--
E
' - - -
R
f--
..__
r - -
R
E
c
E
I
V
E
R
~
ELE CT-TAG
BITO
"
I
,, 2
,, 3
,,
4
,, 5
,, 6
,, 1
,, 8
,, 9
UNIT-SEL-2
0
2'
2
2
//
28
UN
I
T-
R
EADY
FAULT
SEEK-
ERROR
WRITE-PROTEC
T
UN
IT-
SELEC
TED
ON-CYLINDER
AM-FOUND
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