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ZiLOG System 8000 Hardware Reference Manual

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HRM
Zilog
HRM
XONCHR
XON
Character
%43F4
STACK
The
character
stored
at
this
address
is
iriterpreted
by
the
input
interrupt
procedure
as
a
character
that
resumes
output
after
XOFCHR
is
entered.
When
it
is
read
from
the
terminal,
all
output
is
resumed.
XONCHR
is
initialized
to
%11
(control-q).
Stack
Pointer
%40AO
This
address
is
the
base
of
the
user
stack
set
by
the
Monitor
Program
at
reset.
The
top
of
the
stack
is
%4000.
PSAREA
Program
status
Area
%4400
The
Program
Status
Area
for·
entering
various
rupts
and
trap
handling
procedures
starts
address.
This
area
includes
the
program
blocks
(FCW
and
PC)
for
different
types
of
rupts
and
traps.
The
Monitor
Program
sets
up
program
status
blocks
as
shown
in
Table
5-3.
inter-
at
this
status
inter-
these
5-39
Zilog
"
5-39

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ZiLOG System 8000 Specifications

General IconGeneral
BrandZiLOG
ModelSystem 8000
CategoryDesktop
LanguageEnglish

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