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ISIS-II
80:313/8118'5
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SOIJRCE
STATEMHlT
1
2
.:
THE
FOLLO~~ING
P~O(JRA~lS
At-ID
SUBROUTINES
ARE
DESCRIBED
IN
DETAIL
:
..
'
IN
HITEL
CORPERATIOWS
APPLICATION
NOTE
AP-29,
"USING
THE
a0S5
4
.:
SERlf'tI..
I/O
LINES".
THE
FIF.:Si
SECTION
IS
A
GENERIiL
PURPOSE
CRT
5 .
INTERFACE
tHTH
~UTt)MATIC
BAt!!)
RATE
WENTIFICATION.:
THE
~.ECOND
S .
~J:TTWN
IS
H
MAGNETIC
TAPE
INTERFACE
FOR
STORING
OftTA
ON
CASSETTE
? :
TAPES
THE
CODE
PRESENTED
HERE
IS
ORIGINED
AT
LOCATION
BOOH,
8 :
fmC!
MIGHT
8E
PART
OF
AN
E::-~PANSION
PP.O~l
IN
AN
INTEL
SDK-85
9 :
S'.'ST£M
(:f.S
IGN
n T
1~~
:
11
12
E
BITTIt1E
Eo.lI
20C8H
:
Af'ORESS
OF
SiORAfJE
FOR
COP1PUTEv
B
IT
DELAY
14
HAlFB
IT
EQlJ
23CAH
:
ADDRESS
OF
STORAl3E
FOR
HALF
BIT
DELAY
15
8ITSO
EO!J
11
....
.:
['ATA
BITS
POT
OI.lT
(INCLUDING
TWO
STOP
BITS)
16
8ITS!
EI)U
9
.:
DATA
BITS
TO
BE
RECIEVE['
(INCLUDING
ONE
STOP
BID
17
18
ORG
~:eeH
.:
STARTING
AODRESS
OF
SCoK-S5
E:~PANSION
PROI'l
19
213
.:
eRTTST
CPT
HITEPFACE
TEST.
lHN
CALLED,
AWAITS
THE
SPACE
BAR
BEING
PRESSED
ON
21;
THE
';'r'STEt'l
CONSOLE
..
AND
THtN
RESPONDS
WITH
Po
[,ATA
R~TE
YERIFICATION
22
:
~1ESSAGE
THERE
AFTER.
CHARt=!CTERS
T'tPE(!
ON
THE
KE'''SOARD
ARE
ECHOED
21;
O~~
THE
£:tISPLP.Y
TUBE.
~iHEN
A
BREFW
KE'"
IS
WPED,
THE
I':OIJTHlE
15
24:
Pf-STAPTED.
AlLC~mlG
A
DIFFERENT
BAtiE)
RATE
TO
BE
SELECTED
ON
THE
CRT.
2~
CRTT'::r·
Ln
SP
..
28C:)H
26
CPT!'
Wi!
fl.OC€tH
.:
50(:0
MtlST
BE
HIGH
BETWEal
CHARACTERS
27
SIt1
2:::
CALL
BRIO
.;
WENTIF'r'
DATA
RATE
USED
B'"
TERtlIHAL
29
CALL
SrGNO~l
;
OUTPUT
':IG~ION
MESSAGE
AT
RATE
OETEGTEL'
:a
1=CI10'
CALI..
CHi:
REAr)
NE:':T
k:EYSTRorE
INTO
REGISTER
C
?-1
~101/
8.
~:
:2
ORA
A
.~
CHEer.
IF
CHARAI::TER
~lAS
A
<:BREAIC'
(ASCI
I
OOH)
(RH :
rF
50.
RE-IDENTIF't'
DATA
RATE
..
TH
I 5
ALUJl.1S
~~jTHER
RATE
TO
BE
SELECTED
ON
CRT
CALL
COUT
;
OT4ERmSE
COpy
REGISTER
C
TO
THE
SCREEN
36
~7
.IMP
ECHO
.:
CO~ITINUE
IN[IEFINITEL'r'
(UNTIL
8REAIO
?-8.:BPW
BAfJ[i
RATE
Ir.tEHTIFICATION
SUBROUTTNE
1.9
;
413;
41
;
E:~PECTS
A
'::CR)
(Poser
r
2i3l{:,
TO
E:E
PECIEVEfi
FRO/'!
THE
CONSOLE.
THE
LENGTH
(f
THE
WITIAL
ZERO
LEVEL
'.:51i<,
BITS
tHDE)
IS
~1EP'SIjREO
IN
.ORDER
TI)
[lETEP~1INE
THE
DATA
RRTE
FOR
FUTURE
COMt1IJNICATIONS.
42
BRIO'
PIt1
.:
VEPIFY
THAT
THE
"Ot-lE"
LEVEL
HAS
E'.EEN
ESTflBLISHED
ORA
44
jp
45
PoPIi
RIM
46
ORA
47
J1'!
·48
U':I
49
BP.E.:
11vr
:.e
ep!
'l
. [:{R
51
JNZ
52
w;':
51
RIM
P-
BRm
fi
: \
AS
THE
CRT
I S
PO~lER
LNG
UP
.;
~~JN
nOR
5 W L
HIE
STATlIS
eR!1
.;
LOOP
UNTIL
STA~:T
BIT
15
RECIE'·/ED
H
..
-6:
BIAS
COUNTER
USED
IN
[:t£TERtofINING
ZERO
[JURATION
E.
tt.iH
E
.:
51
MRCHINE
C'r'CLE
DELAY
LOOP
8RI4
H,
m::RHlENT
COUNTER
EVER"
84
C'r'CLE5
WHILE
SID
IS
l!lol
A1-49