RCA 301, Programmer'S Reference Manual, Page: 191 / 235

Final Register Contents
( A )
f
= ( A ) j
(B)f - ( B ) ,
R e a d i n g o r W r i t i n g
C o n d i t i o n s
I n s t r u c t i o n
T e r m i n a t i o n
H o w I n d i ca t e d
T o P r o g r a m
I n d i c a t o r
C l e a r a n c e
C o m m e n t s
1. Inoperable on attempt
to address device.
a. Address Verification
on Select.
b. Card Absent on
Select.
c. Malfunction.
d. Power Failure.
At time
detected
Option 1
A„2
X
= 1
(Inoperable)
Manual Reset
by operator
When addressing a unit with a
Select instruction, the 8-10ms. in­
dication will also be given.
2. Inoperable during
Reading or Writing,
or Echo Check during
Writing.
At time
detected
Option 1
A
0
2
J
= 1
(Inoperable)
Manual Reset
by operator
3. No Block Select given
before Read or Write.
At time
detected
Option 1
A
0
2
3
= 1
(Illegal
Operation)
Next Read or
Write Select
4. Card released prior to
Read/Write due to 32
unserviced revolutions.
At time
detected
Option 1
A
0
2
2
= 1
(32 Unserviced
Revolutions)
When uncon­
ditional Card
Removal com­
mand is
1
g iven
5. Preamble Error.
At time
detected
Option 1
A
0
2° = 1
(Parity)
Next Read or
Write
Instruction is terminated immedi­
ately.
6. Parity Error during
reading.
Upon comple­
tion of in­
struction
Option 1
A
0
2° = 1
(Parity)
Next Read or
Write
Indicated as soon as error is de­
tected.
7. Read-after-Write
error during writing.
At time
detected
Option 1
A
0
2° = 1
(Parity)
Next Read or
Write
Indicated as soon as error is de­
tected.
8. Block 255 exceeded
during a Write or Read
without A-B Equality.
At time
detected
Option 1
A
0
2
4
= 1
Next Read or
Write
XV-11