As
an
illustration
of
the use
of
the routine,
and
because the battery could vary
in voltage, lines 4280 to 4320 will show the variation
of
the voltage as the resis-
tor
spindle is turned, from zero
up
to
the maximum value. A value
of
63
will
denote 2.0 volts. Since the battery voltage in the diagram is 1.5 volts, the maxi-
mum
value obtained will be in either 46
or
47.
H-5
~T~
e
G
~
r "
~1~
·r~
~I~
~
r '
~I
~
;)/
I
~~
e
~
~
I ,
'-
I
e
I'
e I
~
C
1
?
~'I
-J
~!
1
~
'I, 1 .,
~
~
d
I,'
~
::
I'
:
y/
...
' I
~
..",/'
I
~~
'~
~I~
::
I)
:: I
.~
'#./!
I,
'IjI) l
..
~~
'#1)
L~
'IV
L""
'II)
""
H-2. Saving and loading the graphics screen from disk.
The following two listings show heavily commented programs written with the
MACRO-80 assembler in Z-80 code. The comments should be sufficient for
an
assembler programmer
to
follow, although they may require the OS Refer-
ence Manual
or
the Technical Reference Manual for further details
of
the use
of
the slave processor.
For
those users wishing
to
enter the programs, use either the MACRO-80 as-
sembler,
or
the dumps
at
the end
of
the listings together with the pertinent in-
structions. A BASIC listing
is
given as
an
example
to
show how such programs
can be used with BASIC.
0001
0005
F2C9
F3SB
0000'
0003'
0006'
0009'
ooOB'
HACRO-SO
3.
44
09~Oec~81
PAGE
21
OOOE
11
B400
01
014E
ED
80
C3
0000
:
*HiiHiifH*iHtffH***fHH**HHi*HHfffffHfHHHffffHHfHffHff
:*
f
;<
Prooralft
Save
the praphic
5creen
to the currentlv
:<
lopped
in
drive to
file
'VRAHDATA.
OAT'
•
:<
SV5te.
PH
:f
CDnfi~uration
9
Kb
RAM
disk & 0
paoe
USERBIOS
size
;<
LaoQuage
lilog
lBO
oneoonic
code
:'
Ref
DCEm
:'
Date
JAN-B4
:<
;
HUffflUHfHUfnHHUHfffHfHUfHHHfflfUHHIfHlfffffHfffff
.1BO
;
ffffHfHffffffHfflHfffH**HHfHffHffHfHHffHfffffffffffflfffffl
:*
f
;< Slandard
CP/M
&
PI~B
equates.
;<
;
ffftffffff.ffffflfffffffffffflfftlffffflftfffftlfftfffffffflf'Hffffffff
BIOS
EQU
OOOIH
; Pointer to
NBOOT
address
BOOS
EQU
OOOSH
;
BOOS
function
di
spatch
jUlP
vector
SCRMOOE
EQU
OF2C9H
;
Poi
nter to the address that
hoi
ds
the
:
current
screen
lode.
SLVFLG
EQU
OF35BH
;
Slave
co
••
unications enable flag.
;
ffffffflftftftfftffffflflfftflffflflffffffff"Ulflffffffflflfflflffffll
;1
f
:*
Reiocator to love the lain progra.
up
to
OB400H
*
;*
;
flffffflfllfffffffflllfflfllfHlffflffllflflffflffftffffttftlffffffffffl
LD
HL
,SOURCE
Set
up
the oriQin address
LD
DE.DEST
Set
Destination address
LD
BC,LEN
Set
up
the
lenQth
of
the
pro~ral
LDIR
And
love the progra ••
JP
OOOOH
Exit
back
to
CP/M
H-6
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