SUB
(16-01) $ubtract
Memory
Irom
Aegistef.
$ublraets
lhe value in
memory
locations Irom the contents
01
a
des:i!ilnated 16-bit register.
The
C
(ca~)
bit represents a borrow
and
IS
sel ta the inverse
of
the resulting binary
C8Jry.
Editor
Assembler
Error
Messages
47
BAD
BREAKPOINT
(ZBUGI Anempt
10
set a breakpoint
that is: greater
!han
7;
in
ROM:
at
a SWI
command;
at an address
where one is aJready set.
BAD
COMMAND
(Ultor)
IIlegalcommand!etler.
BAD
COMMAND
(ZBUG)
Commandused
is
nOiaZBUG
"""""'''''.
BAD
LABEL (A
..
emblel')
Symbolused
is: an Illegal
symbol:
noIlerminated
WÎth
a space, tab, orcarnage retum; used
with
ORG
or
END
which
do
nol
allow labels.
BAD
UNE
NUMBER
(Editol')
The
lil'\El
numberused
is
n6t ln
the
rangeai
'-63999.
BAD
MEMORY
(Assembler)
Altempting
10
do an
ln·memory
assembly which would: overwrile system memory
(an address lower than hexadecimal
0600); overwrile the edit
bufferor
symboltable; go into the protecled area set by
USRORG;
go
overthe
top
01
RAM.
BAD
MEMORY(ZBUG) Data did
notstore
correctly on a
memory modilication.
BAD
OPCODE
(Auembler)
Opcode
is
eitherinvalid
or
ls
oolterminaled
with a space.
tab
or carnage retum.
BAD
OPERAND
(A
..
e_bler)
Synlax
error in operand
field.
BAD
PARAMETEIlS
(Edltol')
Syntaxerrorin
command
line.
BAD
PARAMETERS
(ZBUG) Specified Iilenameis more
than eightcnaraeters.
BAD
RAnlX
(ZBUG) Numbering system is
oot10.
80r
16.
BlJfFER
FUU.
(Edltol')
Nol
enough room in1he Edit •
Bumer.
BUfFER
EMP1Y
(Edltor)
Command
feQuires
lext
in
the
Edil
Buffer
and
there isn'tany.
BYTEOVERFLOW
(Asse.ble.-I
Fieldoverllow
in an
Immediateoperand,
anoffsel,
a short bfanch, or an
FCB
pseudo
op.
DP
ERROR
(As.emblel')
Direct Page Error. The high
arder byte
01
an operand wheredirect addressing
has
been
lorced
does
not match the value set by the most recent SETDP
pseudo op.
FMERROR(Edltol'andZBUG)
File Mode Error. File
being loaded is not a
TEXT
Iile (il in the Edllor) or a
CODE
Iile (il
InZBUG).
110
ERROR
(Edltol'
and
ZBUG) Input/Output Error, A
checksum errorwas eocountered while loadlng a Iile
lrom
a
cassette
lape.
MlSSING
END
(Auemblel'I
lastcommand
is
not
END.
TFR
Transler Register
to
Register.
Translers
data
bet'Ween Iwo designated registers.
TST
Tost.
Set
the
N (negative) and Z (zero)
bits
according
ta
the
contenls
of
a memory location, and
c1ear
the
V (overllow) bit.
NMI
Non-Maskable Inlerrupt. Hardware Interrupl.
A
negalive edge on Ihe NMI input causes ail
01
the processor's
regîslers
(excepl
the
hardware
stael<
pointer)
to
be
pushed
anlo
lhe
hardware
stael<,
slarlingat Ihe
end
01
the
cunent
instruction.
SYNe
SynctuonizelO External Event.
Provldes
software synchronization wittl ahardware process.
When executed, the processor
enlers
a synchronizing state,
stops proceSSÎng insttuctions. andwaits
lor
an
interrupt.
Wheo
an
inteHuptoccurs,
lhe
synchroniZlng state
is
cleared and
procesSÎng
conlînues.
SWl
Software Intenupt.
AlI
ollhe
processor 'B91sters
are
pushed
0010
the
hardware
stack (wilh
the
exception
of
thehardwarestad< pointer).
and
controlistransferredthrough
the
software interruptvector.
SW12
Software
Int9nupt2.
Ail
01
the
proœssor
'69isters
are
pushed
onto
the
hardware
stack(wilh the exceptlon
olthe
hardware
slackpointer). and
control
is translerred throogh the sotwareinterrupt 2 veclor.
IRQ
Interrupt Request, Hardware Interrupl.
Ifthe
1(inlerrupl raquest mask) bil
isclear,
a low level
on
the
lAC
inpul causes this interrupl sequence
10
occur at the end
01
the
current Instruction.
..
FlRQ
Fast Interrupt Raquesl,
Hardware
Interrupl.
A
FIAC
Wlth
the F (Iasl inlerruplraquesl
mask)
bil
c1ear causes
this
inlerrupt sequence
la
occur
allhe
end
0'
Ihe
currenl
inslruction.
SWIS
Software Interrupt3.
Ail
of
the
prOC8ssor
registers
are
pushed
onto
the
hardware
stack (with the exception of the hardware
slack
pointer). and
control istransferred through
the
sotware interrupt 3 vector.
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