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NEC CP/M-86 User Manual

NEC CP/M-86
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GSX-86: Graphics
for
the
APe
9-6
Invoking GSX-86
To
invoke
GSX-86,
enter
the
command
GRAPHICS
[:d]
where d is
the
specifier
of
the drive
that
holds
both
ASSIGN.SYS
and
the
device
driver(s).
To
disable GSX-86,
enter
the following
command.
GRAPHICS
NO
This frees
the
memory
space used by GSX-86
and
the device driver.
Warm
Starts
And Cold
Starts
If
the
system
hangs
when
GRAPHICS
is
enabled,
a
warm
start
does
not
disturb
the
graphics
mode
initialization.
However,
a
cold
start
(rebooting
the
hardware)
dis-
ables GSX-86.
For
more
information
on
the
operation
of
GRAPHICS
and
a
complete
listing
of
GSX-86
command
and
error
messages, see The CPIM-86 System User's Guide for
the
APC.
OVERVIEW
OF
GRAPHICS
SYSTEM
EXTENSION
STRUCTURE
This section
introduces
the GSX-86
architecture,
its
components,
and
their
func-
tions.
Each
part
of
GSX-86
is
described
in
detail
later
in
this
chapter.
This section
also
describes the
memory
management
techniques used
by
GSX-86.
GSX-86 Architecture
GSX-86
is
an
integral
part
of
the
operating
system.
Application
programs
interface
to
GSX-86
through
a
standard
calling sequence
similar
to
the
BDOS
conventions.
Drivers
for
specific graphics devices
translate
the
standard
GSX-86 calls
to
the
unique
characteristics
of
the device.
In
this way, GSX-86 provides device-
independence
since
the
peculiarities
of
the
graphics
device
are
not
visible
to
the
application
program.
GSX-86 consists
of
two
components:
•
Graphics
Device
Operating
System
(GDOS)
•
Graphics
Input/Output
System
(GIOS).

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NEC CP/M-86 Specifications

General IconGeneral
BrandNEC
ModelCP/M-86
CategoryDesktop
LanguageEnglish

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