IBM 7090 - Page 73

I
I Time I
Pri Op 30
I E TIme I
SB_SR
E7 (D1)
2.12.50.1
L Time
1st Step
2.10.30.1
OBJECTIVES:
1. Bring Characteristic and Fraction to SR.
OBJECTIVES:
1. Prepare for Alignment of Fractions.
2. Test to See if Alignment would Exceed
Capacity of Registers.
Reset MQ
(Do NOT Interchange Equals)
1
~AD(B)
AO(OO)
Comp Ac (Q-B)
_AD AO(D3)
SR(l-35) ~AD
1st Step L
(S, 1-35)AO(D3)
Turn on T2
Tgr
2.13.27.1 2.13.22.1
2.13.21.1 2.13.95.1
2.10.3S.1
t
Yes (C AC < C SR) <$>
...----------< Ca~
r-- _____ .-- __ ..---~~N-o-'-(C-A-C->__,C SR, Interchange AC and SR)
t
SR(S) _ AC(S)
AC(S)
-- SR(S)
AC(l-35) -.SR
A D( Q-35)-+AC
A6 (D1)
A6(D1)
A6(D1)
A6(Dl)
2.13.91.1
2.12.01.1
2.13.01.1
2.13.31.1
+
/ t
t t
~
No (CDIFF < 77S) -l Yes (CDIFF > 77S)
~
1 or 2
/
1-AD(B)
Comp AC(Q-S)
A8(D3) -AD AS(OO)
=1
(C ACC is Alw
ays
<" than C SR,
2.13.27.1 2.13.22.1
AD (3-17)-+AS
AS (D3)
Clear
AC
(Q-35) so 1 to Adde r B is Carry to Units
t
t
Position)
FIGURE 5.3-23A. FAD +0300
72
3.06.16.1
AS (3-8)-
SC112-17)
A10
(D1)
3.06.18.1
1
2.15.1B.1
t
To L Time 2nd Step (Fig 5. 3-23B)