Write Fault - Spectravideo SVI 318 Service – Technical Manual

TYPE I I AND I I I
FOR
STATUS
N AME
B I T
· Th i s b i t whe n s e t in d i c a t e s the d r i v e i s no t rea dy .
NOT READY
S 7
WR I TE
S 6
P ROTECT
s s
R ECORD T YP E /

WRITE FAULT

S 4
R EC ORD NOT
FOUN D ( RNF )
S3
C R C E RROR
LOST DATA Wh e n s e t , i t ind i c a t e s t he com p u t e r d i d not r e s pond to DRQ
S 2
S l DATA REQUES T
s o
Wh en s e t , c ommand i s und e r ex ec u t ion .
BUSY
COMMANDS
H EAN ING
r e s e t , i t i n d i c a t e s tha t t h e dr.i v e i s rea dy .
i n ve r t e d copy of t h e R e a dy i n p u t and ' o re d ' w i t h MR .
Type I I and I I I Corrnn a n d s w i l l no t e x e c u t e un l e s s the d r i v e
i s r e a dy .
On R e a d R e c or d : N o t U se d .
I t i n d i ca t e s a Wr i t e P ro t e c t .
any W r i t e :
wh e n upda t e d .
:
On R ea d Record I t i n d i c a t e s t he r e c o r d- t ype code f rom d a t a
f i e l d a d d re s s ma rk .
On any Wr i te : I t i n d i c a t e s a Wr i t e F a u l t .
re s e t whe n up da t e d .
Wh e n s e t , i t ind i c a t e s t h a t t he d e s i re d t r ack , s e c t o r
s i d e we re not found .
S 4 i s se t , an e r ror i s found in one or more ID f i e l d s ;
I f
o t h e rw i se i t ind i c a t e s e r ror in d a ta f i e l d .
re s e t whe n updat e d .
i n o n e byte t ime .
Th i s b i t is a cop y o f the DRQ ou tpu t .
i n d i c a t e s t he DR i s f u l l on a Read O p e r a t i on o r t he
emp t y on a Write ope r a t i o n .
upda t e d .
comman d i s under execu t i o n .
4 . 87
O n R e a d T r ack :
De l e t e d Da t a Mark
1
=
Th i s b i t is re s e t whe n up d a te d .
Th i s b i t i s re s e t t o z e ro whe n upd a te d .
Th i s b i t i s re s e t to z e ro when
Wh e n
Th i s b i t i s an
The
N o t U s e d . On
Th i s b i t i s re s e t
.
0
Data Mark .
=
Th i s b i t i s
,
o r
Th i s b i t i s
Whe n se t , i t
DR
i s
When re s e t , no