FLT
lood
Supervisor
Controls
lnitioN
FLT
Load
KH:WS
Bring
Up S"'rt
1/0
to
1/0
Ruet
IAR
Tum
Off
Retry Trigger
Tum
On
lnhtbit
IARCaunt Trigger
KH511
,,,....
Start
1/0
~--~Na=<"'End
Updat•>
"-
Request/
KH~l
1--0
1--0
NOTE
l'":::,,_
Channel utes start
1/0
and select
channel
lines,
and
req~ts
a
start
1/0
routine {priority 3
req).
lrol'll-
fen
Nquest
to
position
~ister
G8161,
GOl31,
GFl21
NOTE
2 7
Priority 3 Request
KE881
Set
Unit
Addrnl
an
ALCH
I
OTC
to
1/0
Set
Read
Op°'
Rood
Backwold on
ALCH
OTC
to
1/0
Tum Off Reod
Op
or
Read
llackwatd
on
ALCH
KH551
KH551
KH551
KH551
Na
KH521
KH541
OTC
lo
1/0
OTC
lo
1/0
Idle
Cycle
OTC
lo
1/0
Tum
Ofr
Start
1/0
to
1/0;
Tum
On
First Word
FIGURE 25.
FLT
LOAD
VlA
TAPE
OTC
KE-451
OTC
KE-451
OTC
KE-451
OTC
KE-451
OTC
KE-451
Channel
Nth
unit
address in B-reg
(byN
O),
hnn•n"'
;t
to
c....,,
(byteO),
resets finish latch, requests CCW-2
routine (priority 2 req)
GBl61,
Gflll
Channel
sets
op
into
I-reg
(byte
O)
and
GP
reg
5-7;
sets
op
reg
fT-om
GP
5-7;
sets
GP
1-2
to
00
for
read,
11
for
reod
badcword; sets IC
to
GP
1-2;
sets finish
latch;
transfen
CCW-2 request into
position register
GB161-171,
GClOl-131,
GRl31
Chon Step:
Cyc
Ctr,
Rneh
Finish Latch
GAIJI
G8161
Chan
Steps
Cycle
Counter
GAl31
Channel
tets
CI
and
C.4
lak:hes,
step
cycle
counter,
starts A-clock,
iets
finish
latch, requests unit
select,
tronsfen
request
to
position
register
GA131·
GBl61
171·
GFl51
171 181
Channel
Selech
Tape
and
Checks
for Zero Status
Condition Code
=0
Condition Code I 0
Chon and unit
status
are
in
KE051
C-.-eg, byte 1,
roller 2
If zero status,
channel
takes in
data
from tape
and
when
C-reg
is
full,
transfers
data
to
8-reg
and
requestsreadstore
routine
GGIOI
Gate
SOR
4-1
Turn
Off
OTC
to
t/0
Tgr.
Turn
Off
Inhibit
IAR
Count
into
SAR
KH511
4-2
First
Second
or
s.con~
Pair
of
llllOrds
KHS41
4-3
Fint
KHS41
,,,,,.;Wait
<.:~'
Reod
Store
Req
KH51
3~
End
UpdaN (Stolus In)
KE-451
Chan sets memory
byte
counter
reg,
st9fl'S
cycle
ctr,
rnets
finid'1
latch
Chon
tends
data
to
SOR
by
requesting and
executing
read
stoN
routines.
The
data
is
sent
to
the channel
via
the
service
in--rviu
out
teqUel"IC•
which
takes
a byte
of
data
into
the
C-reg
until
it
is
full,
then
h'Onden
data
to
the
1-r.g
f«
tnmltnittal
to
SOR
by
the
reod
store
routines.
Process contir'l..te$ until
tape
ends a,_ration
by
sending status
in.
Chan
1eh
finish latch
Gll61,171
GGlll
Priority
R1!4f.Jest
KE881
NOTE:
I.
T!ie
fint
and second r'IJmben
comnpond
to the
seqvence
stat
ond
aequence
counter,
respectively.
2. Where reference is made to a 1elector
channel
routine,
ton.
microprogram
as
shown on the
CAS is
not
beirg
executed
in ROS.
Instead,
the
CPU
is
simulating
these
routines
by
sendi"fill
the
required
number
of
DTC'l;
and
the selector channel responds
to
these
DTC
1
1 in tf.e some
manner
that
it
responds during a norqt0I microprogrom.
3.
This
OTC
is
held
octive
until 4-4 time
to
retain
the
chamel
ond
unit
stoh.tl durirv
3-3
time.
Status
is
displayed
on
the left side of
CPU
roller 2 (ony position).
4.
This
OTC
is
held
active
until -4-2
time
ancf
~Ids
the dota in
tt...
1-Ngister
until
it
is
set
into
SOR
at
4-1 time. The channel
A-clock
advances
to
Al
tiJM; the
cycle
counter
is
at
step
l;
and the position regis
..
r indicates
read
store.
Chef!.
requesh
end
update
when
tape
te""inotet
record
by
tending
stoM
in.
rhe
request is
made
ofter
oper-
ational in falls
follC1111ting
the final
staM
sequence
GG161
OTC
to
1/0
Idle
Cycle
DTC
to 1/0
~
PCI'-...
equest
"-.
to
KH521
2-5
2-6
2-7
OTC KE45 I
OTC
KE451
Chon sets reconf
encf
latch,
s~pl
eye.le
cwntier
ol'\d
rese~
finish
latch
GAl31
8161
GFlll
Chon
Sek
Finish Latch
GBJ61
Chon Mokes
PCI
Request
GG181 GBl71
'if
v
••
PCI
Reql;est
KE88
I
End
Stotuo
Chock
r-
--
1
I
I
I
I
PC
I E noble to
l/O
KH531
Idle Cycle
3-1
NOTE 3
Set
OTC
to
1/0
Trigger.
Select Storage
OTC
KE
..
51
KH551
KEIJI
3-2
Holt
oher
load
Auto
Reread
..................................
I I
'
.-
Backward '
I
RoodC..,..J
I I
I
<
Backspace
Off
Trigger
>"=---------~
KH555
On
Tu".
On
Backspace Tgr
Tum
On
Retry Trigger
KH555
Tum
Off
OTC
to
1/0
Trigger.
Reset
IAR
Kl1541
4~
KH551
OTC
ta
1/0
Rehy
Trigger
KH555 4-S
Off
Reset IAR. All counters
Go tQ
~in
Store Mode
KH541
End
of
Sequence
4-5
OTC
KE451
Chon requests
rrpt
routrne,
tronsfen
req
to
pos register
G8171 G
181
Chon
sends
chon
and
unit
statvs
to scan bus;
deps
cycle
counter,
resets finish latch
GAl31,
GBl61,
GG171
- -
--,
Scan
Bus
Bit 6 -
Unit
Check
Scan
Bus
Bitl2-0otoCheck
-~
3-3
Chan
generates
channel
reset,
sen
finish
latch
in
idle
mode
GB161
GGl71
Maintenance
Features
(3/71)
43
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