Sharp PC-1500 - Page 120

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C.4 Printer Modes
As the p ri nte r is op erating it may be in one ol t\vo modes; TEXT or GRAPH. These mo des
corres J) Ond roughly to hum an typ ing versus hum .an drawi ng. Since ll \OSt commands \IVOrk only
in one mode or the othe r, it is impo r t ant to se lect tlhe propt!r mo de before i ssu ing ir'lstructions.
The TEXT nl ode is used fo r print ing numbers and characters. The •:1 idth of the printer 's paper
is divided i nto co lumns, the nombc r of which is rel ated to t he speci fi ed charac te r size. Vertic al
;ind hori z ont4:11 tabb ing commands arc provided to f o rmat t ext i nfor mat ion.
In the GRAPH mod e, a vari ety of diver se figures, charts, and tables may be create d. Commands
to draw both solid and dashed lines. using ei ther a direct or relat iv e coordin ate systenl are
available . All drawings uti li ze a norma l X- Y coord in ate schen,e.
To spec ify TE XT mo de, the statement :
TEXT
is sufficient. Certain commands (d iscussed l at er I cau se an au tomat i c: switch to the T EXT mode.
Spec ifying the GRAPH mode is equally sim ple . The state ment:
GRAPH
w ill initiate this m ode . setting the pen to t he far le ft side of the paper.
C.5. Listing Programs
The LLIST comm and causes the cur r ent program, or port i ons ot the program to be print ed.
Because selective p ri nti ng of program sect ions is possible, the LLIST command is e xtremely
helpful during the pro gram devel opment pr~ess .
The form of the LLIST command is similar to the form of the LIST co mman d. Because LLIST
is more versatile, the re are subtle d ifferences. The LLIST forms are as follows:
LLIST
Prin ts a ll program lines currently in the program memory .
L LIST expression
- Prints on ly the pr ogram li ne whose li ne num ber is giv en by expression.
L LI ST • expres.sion
P ri nts all program lines up to, and includ ing, the line whose number is given by th e
expression.
LU ST exp r ess io n.
- Pri nts rprogr am lines beginning \o\lith the li ne whose nu mber is given by iexprcssion.
L LIST exp re ssion 1, expression 2
Prints
progra rn li nes beginning with the line \ 'Vhose numbe r is given by exp ression 1 and
endi
ng with the line whose number is given by cxp ression2. Thus, if the command is:
LLIST 100 . 150
t he n all lines between 100 and 1 50 (if any) will be l is t ed .
LLIST
"label"
- Prints t he progr am line co ntaining the given label.
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