<s>
NewDos/80	B-Operating_System
is	O
a	O
third-party	O
operating	B-General_Concept
system	I-General_Concept
for	O
the	O
Radio	B-Device
Shack	I-Device
TRS-80	I-Device
line	O
of	O
microcomputers	B-Architecture
released	O
in	O
1980	O
.	O
</s>
<s>
NewDos/80	B-Operating_System
was	O
developed	O
by	O
Apparat	O
,	O
Inc	O
.	O
of	O
Denver	O
,	O
Colorado	O
.	O
</s>
<s>
NewDos/80	B-Operating_System
version	O
2.0	O
was	O
released	O
in	O
August	O
1981	O
.	O
</s>
<s>
It	O
ran	O
on	O
the	O
TRS-80	B-Device
Model	I-Device
I	I-Device
and	O
Model	O
III	O
.	O
</s>
<s>
The	O
operating	B-General_Concept
system	I-General_Concept
had	O
additional	O
commands	B-Application
and	O
features	O
that	O
were	O
not	O
available	O
in	O
TRSDOS	B-Operating_System
,	O
the	O
native	O
operating	B-General_Concept
system	I-General_Concept
for	O
TRS-80	B-Device
computers	O
.	O
</s>
<s>
NewDos/80	B-Operating_System
allowed	O
TRS-80	B-Device
computers	O
to	O
take	O
advantage	O
of	O
advances	O
in	O
floppy	B-Device
disk	I-Device
storage	O
that	O
went	O
beyond	O
the	O
initial	O
87.5KB	O
35-track	O
,	O
single-density	O
,	O
single-sided	O
format	B-Application
.	O
</s>
<s>
The	O
system	O
also	O
corrected	O
issues	O
that	O
early	O
versions	O
of	O
TRSDOS	B-Operating_System
had	O
with	O
arbitrarily	O
losing	O
data	O
due	O
to	O
errors	O
in	O
how	O
it	O
communicated	O
with	O
the	O
contemporary	O
TRS-80	B-Device
disk	O
drives	O
 '	O
1771	O
disk	O
controller	O
.	O
</s>
<s>
NewDos/80	B-Operating_System
had	O
many	O
options	O
for	O
specifying	O
specific	O
low-level	O
disk	O
configurations	O
.	O
</s>
<s>
Settings	O
such	O
as	O
diskette	B-Device
formats	O
,	O
disk	O
drive	O
types	O
,	O
track	O
geometry	O
and	O
controllers	O
could	O
be	O
configured	O
using	O
the	O
PDRIVE	O
command	O
.	O
</s>
<s>
NewDos/80	B-Operating_System
was	O
written	O
by	O
Cliff	O
Ide	O
and	O
Jason	O
Matthews	O
.	O
</s>
<s>
Ide	O
was	O
the	O
primary	O
author	O
of	O
NewDos	B-Operating_System
in	O
all	O
of	O
its	O
incarnations	O
,	O
Matthews	O
wrote	O
"	O
patches	O
"	O
for	O
various	O
applications	O
such	O
as	O
Scripsit	B-Protocol
and	O
VisiCalc	B-Application
.	O
</s>
<s>
The	O
following	O
is	O
a	O
list	O
of	O
NewDos/80	B-Operating_System
commands	B-Application
:	O
</s>
<s>
While	O
criticizing	O
NEWDOS	B-Operating_System
's	O
"	O
nearly	O
incomprehensible	O
documentation	O
"	O
,	O
Jerry	O
Pournelle	O
wrote	O
in	O
1980	O
that	O
it	O
was	O
"	O
a	O
much	O
better	O
operating	B-General_Concept
system	I-General_Concept
"	O
than	O
the	O
"	O
needlessly	O
complex	O
"	O
TRSDOS	B-Operating_System
and	O
stated	O
that	O
"	O
Tandy	O
ought	O
to	O
be	O
marketing	O
NEWDOS+	O
themselves	O
"	O
.	O
</s>
