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BASIC COMMANDS AND STATEMENTS

Figure

3 shows

the

genral

format

of

a

shape

table.

You

can

see

that

the

first

few

bytes

of

the

shape

table

are

used

to

tell

the

computer

how

many

shape

definitions

are

within

the

shape

table,

and

where

these

shape

de

finitions

are,

relative

to

the

starting

address

of

the

shape

table.

The

last

byte

of

your

shape

definition

must

be

zero

to

signify

the

end

of

the

shape

table.

S

1art

•S Byl< S+O

+I

+3

+4

lndtx

+S

+2o

+ln+l

S+D

I

S+D2

Shap<

Ddlnieloas

S+Dn

n(O

lo

Ff)

Unused

Lower l DJ1ll1

Upp

<r

2

Dl

&

lts

Lower 2

Dl11t.1

Up

p<r 2 Di&lts

. . .

. .

.

.

. .

Lower 2 Dichs

Upp<r 2

Dl&l

lS

Flrsl

Byte

.

.

LH t Byt

t•

OO

first

Bytt

. .

Last Bylt•OO

. .

. .

. .

Flrs

l Byl<

. .

LHl

Bylt•

OO

}

Tot

al Numbt r

of

Shape

Ot rlnltlons

I

D1:1ndtx to First Bylt

of

Shapt

Dtfln

ltlon• l,

Rtlatht

co S

I

Dl:Jadtx

to First

Bytt

of

Shape

D

dlalllonal,

Rtla11Yt Co S

I

On:Jnd

ex

to First

Byte

of S hape

Ddlnlllo

n•a

1

Relative to S

I Shape

Delinlllon

•I

I Sh

ape

Dcflnlllo

n• 2

I

Shape

D<

flnlllon

• o

Figure

3.

General

Format

of

a

Shape

Table.

II-33

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