HP 9845B/C CE Service Manual

HP 9895A Disc Memory Command Set A-43
NOTE
In IBM format, writing to a sector which has the D bit on clears the
D bit.
Parallel poll is re-enabled after the write completes or
aborts.
If more than one sector is to be written, any number of
write
commands can be used in succession. The 9895A will
update the target address automatically. A write will fail if it
follows
another write which failed, so there is no chance of
an error in the middle of a long transfer going unreported.
However, error detection will be quickened if a DSJ is used
after each write seq uence is completed.
HP-IB Sequence:
ATN
I POl~DDRSI
Pnmary
Talk
ATN
IPOl~DDRSI
Pnmary
Listen
Status:
Buffered Write Request
ATN EOI
ATN
P
P
PllOlOOl P
I Secondary I D
01000
Opcode I
UUUU
1
Unit
~ I POll 1111 I
Unlisten
ATN
I PllOOOOO I
Secondary
Receive Data
P
P
D
~ Data Bytes ~
No errors.
Sl - 0
Stat 2 - Unchanged
DSJ -0
Unsuccessful write.
Sl - Error
EOI
P
P
E
Stat 2 - Bits A, E and C set, if appropriate.
DSJ
-1
ATN
I PlOlllll
l
Unlisten

HP 9845B/C CE Specifications

General

Brand	HP
Model	9845B/C CE
Category	Storage
Language	English