Supervisor Controls
lnitlote
FLT
Lood
6
Set
S..L. Tgr,
Set
Seek
Cl't'I
Tgr
Retry
or
_____
_j"'----..L~--\
1 Aeoa Enhy
KH555
Set
inhibit
IAR
count
trigger
KH511
1-0
No
Priority 2
Req
KEBBl
Put Unit Add"'ss on
AlCH
KH511
551
1-1
\NOT!'
2
~
Priority 3
Req
KEBBl
OTC
to
1/0
OTC
KE"51
KH551
1-2
Turn
Off
Unit Address on
ALCH
Put
Seek
or
Read Commond
on
ALCH
KH511
OTC
to
1/0
KH551
Tum
Off
Seek
or
Reod
CofMIC!nd
on
AlCH
No
ccw-2...,_
Req
/
KH511
1-S
1-3
1-4
1-5
Chon
uses
start
1/0 ond
chan
select
lines
and
....,..ts
a
start
1/0
- (Pn
3),
....
nsr.
..
Nil
G~lr:
Gt:~',
GF121
Fi
le
tal•ts 6 bytes
of
data
on
see!.:
command
and
ends
operation
by
sending status
in.
Channel
woits for
device
end
ond
comnmnd
chaim
to
.....d by ..que<Hng
CCW-1
-
(pri 2)
and
tronsfen
it
to
pas reg
GG161,GV11
I,
GV141,GBl71
Ch°"
puts
unit
address
in
8-teg
(byte
0),
transfen
it
to
C-reg
(byte
0),
IWMts finish
lotch,
requests
CCW-2
routiM
(pri 2)
GB161 GF131
Chon
takes op
into
8~
{byte
0)
ond
GP
,..
5-7,
sets Of) reg from
GP
reg
5-7--write
op
for seek
or
reod
Of>
f«
.....d--•11GP.wg1-2
ta
00,
'9ts
BC
to
GP
reg
1-2,
seh
finish
latch,
transfers
CCW-2
req (pri 2)
to
~ition
reg
G8161,
171,GClOl,
131,GA131
Priority 2
Req
Kf88 I
OTC
to
1/0
KH551
No
Put Cormrond
Choin
ond SIU
·8its
ori
ALCH. Reset
SAR
OTC
to
1/0
1-6
1-7
Tum
Off
Command
Chain
and
SIU 8its
on
ALCH
on
Seek
Command,
Idle
Cycle,
or
Read
OTC
ro
1/0
FIGlJtE
26.
FLT
LOAD
VIA
DISK
OTC
KE"51
!die
Cycle
1-7
KE.451
Chan
steps
cycle
c:oonter,
resets finish
latch
GA131 GB161
Chon
sets GP
"'9
ER,Cl and
C-4
latches,
sf'epl
eye
c:ounter,
storh
A-elk,
&ets
finish
latch,
requMts
unit
sel.ct,
traNfers
it
to
pm
reg,
sets conwnand
chain
and
SIU po1i-
tion
of
flag
'Wfi'I
on
•ek
cO'l'WnCJnd,
storts
initial
selection
A131,Gll61,
171
FlSI,
171 181
Tum
Off
S"'rt
1/0"'
1/0,
Tum
On
First Word
KH521,.541
KEOSl
Channel
sele..:;f'l
disl..
oiid
checks
for
zero
stol'u•
Condition
Cod.
: 0 Condifion Code ""(l
Chonnel
ond
vnit
stotvs
a"'
in
byte
I
op
C-reg
roller
1
If
initial
status
is
zero,
channel
hoids
service
out
up
and
requests
write
fetch
routine
on seek command
oiidtransfersittopos
~ister
Chon
ntquests
end
update
when
m.
temtinat..
NOd
data
by
send-
ing
status
in.
The
teqtJf!st is mode
ofter
op
in
foll~
followif"g
the
fir.al
status seque
rK_
.,.
GG16l
(lion
sets
record
e"ld
lotdi,
steps
,__D_TC
__
KE_45_1
____
_...,cycle
counter,
resets finish latt:h
PCl Enable
to
1/0
KH531
3-0
Idle
Cycle
3-1
Set
OTC
"'
1/0
Tg,
Select
Stooage
St.p
IAA
KH551 1(!131
3-2
,--
1
I
I
I
I
I
I
I
End
s
..
1us Check
L
Set
Retry
Trigger
KHS55
3-3
Tum
Off
OTC
to
1/0
Tg,
KH541,
551-tlAA
4-4
OTC
to
1/0
KHSSl 4-5
On
Call
SupnvilOf" Controls..Ste-p
Cy!;nde,
C".
fod
FLT
load
RH.541
553
DTC
KE451
l'Cl
1oqu_,
KE88
I
NOTE 3
Dl'C
KE451
OTC
KE"51
GA131,G8161,GFT1
l
Chon
sehl finish
lott:h
GB161
Chon
makes
PC!
request
G8171 GG181
Chon sends
channel
ond
unit
status
to
scon bus,
steps
cycle
counter,
resets fini$h latch
GA131 GSl61
GG17i
3-31
I
I
I
I
I
I
I
l
__
_J
Scan
&vs
Bit
6 - Unit Check
Scan
B\I&
Bit
12
- Doto Check
r~
generotes
.:.hor
reset'
1
sets fin:sh
hie:~
i,..,
idle
mode
~I
·G171
Select
Storage
C:nt
Up
in
SA.A:
KH53l
3-7
No
Set
OTC
to
1/0
Trigger
KH551
3-7
Idle
Cycle
Gate
SOR
KH541
4-1
Turn
Off
OTC
to 1/0
Tgr
4-2
v
..
4-2
No
Ye-s
First
Wo<d
Seek
Trigger
KH5S5
4-3
'1{.,
~1--·1
ln.,;:b;,
i "-
/'i~
Cnt
'-
~
Jngger
/
KH5l
1
4-3
Off
No
$~1
lnh;bit
IAR
Cnt
Ctrl Tgr
(Pri
2,
Ctrl
I)
KH511
541
Set Inhibit IAR
(nt
Tri'.}ger
Kf8BI
OTC
KE"51
Select
Storage
and
QR
Select
I
KH5<41
552
3-7
OTC
to
l/U
KH551
Set
Cylinder
Ctr
to
AL
....
H Trigger
KH553
554
4-
KH551
OTC
to
1/0
OTC
KE'451
(NOT!'
4)
KH554
Turn
Off
Cylinder
Counter
to
ALCH
Trigger
On
4-2
Turn
Cff
Inhibit
IAR
Cnt
Ctr! Trigger
(Pri
2, Ctrl
J)
KH51
l
541
Turn
Off
Inhibit
!AR
Cnt Trigger
H511
541
Chcn"el
stPpS
cycle
cou"te-r.
resets finish
lotch,
sef'l store byte
cor>trol
register
on
~ad
G_.131 GB161
GGl
II
OTC
Kf451
OTC
KE.451
Chon sends doto
to
SOR
by
requesting and
executing
read
store
rtnes.
Doto
is
sent
to
the
channel
vio
the
service
in/
service
out
sequence.
Eoch
byte
of
doto
is token
into
C-reg
until
it is full.
The
fvll word
is
then
transferred to
8-reg
for
transmittal to
SOR
by
the
read
store
rtnes.
Process
continues
until
file
ends
operation
by
sending status
in.
Clion sets
finish
latch.
GB161
171,GGlll
KH555
3-4
Tum
Off
Seek,
Seek
Ctrl
Tgr
(Pri
2,
Ctrl 3)
Channel steps
cycle
counter
GA131
First Write Fetch
Chon
tokes 4 bytes
cycle
counter
info into
8-reg
ond transfers
it
to
C-reg.
Service
out
hold
is
reset
and
the
doto
is sent to the
file vio
the
service
in/service
out
sequence.
Chan
sets finish
lotch,
requests a
write
fetch
rtne (pri 2), transfers
it
to
pos
register.
Second
Write Fetch
Chon
loads
8-reg-;;ith
data
(2
bytes
of
cycle
counter
info) ond
tronsfen
it
to
C-reg.
The file
tokes 2 bytes
of
cycle
counter
info
and
ends
operation
by
send-
ing status
in.
Chon
sets finish
lat-ch, requests
write
fetch
rtne
(pri 2), transfers
it
to pos
register.
Third Write Fetch
Chan
~8-reg
with
doto
(zeto1)
and
tronsfen
it
to
C-reg.
Data is
not
used .
Chon
sets
Finish
latch.
4-3
Turn
Off
Fi~t
'Word Trigger
NOTES
l:
The first ond second numbers correspond to
t+ie
W!quence
stat
and
sequence
counter,
respectively.
KH53 J
3-4
,---
"'
I ,,.,.write
!
Nn
.Fe~h
or
Read/
~.:itoreReq
KH5
II
3-4
~e;
44
(3/71)
Model 50 FEMM
2: Where R"ference is mode to a
selector
channel
routine,
the microprogram
os
showri on
the
CAS
is
not
beirg
executed
in
ROS. Instead, the CPU
is
simulating the$e routines
by
sending the required nvmber
of
DTCs, and
the
selector
channel
reSpof'ds to these
DTC's in
the
some manner
that
it
responds duririg a normal microprogram.
This
OTC
is
held
octive
until
4-4
time
to
retain
Hie
channel
ond
unit
status during
3-3
time.
Stotus is displayed
on
the
left
side of CPU roller 2
lany
position).
-4.
This
OTC
is
held
octive
until 4-2 time ond holds the
data
in the
8-register
until
it
is
set
into
SOR
at
4-1
time.
The
channel
A-clock
odvo"ces
to
Al time; the
cycle
c:ounter
is
ot
step 1; ond
the
position register
indicates
read
store.
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