The
following
sets show more of the rollover inconsistency that occurs
with
keys in the
bottom
row of the keyboard:
KeY1
Keys
Rollover Result Key Order
Column
#1
#2
#3
#4
Even
rn
[<t6
Keys
#1.
4,
3
[t6
<
Keys
#1,
3,4
#1
#2
Even
Il
SPACE
li
t6«>
Keys
#1,
2, 2,
3
#1
]<
üdd
Keys
#1,
3
J<t6<
Keys
#1,
3,
2,
3
#1
#3
üdd
<
Key
#1
These three-key roi lover problems are not unique to the alphabetic and
special character keys alone, The right-hand portion of the keyboard, containing
the cursor controls and numerical keys,
is
a continuation of the even/odd column
format
as
shown
in
Figure 5-1. Cursor control and numeric rollover respond like
the alphabetic and graphie rollover.
ln summary, to avoid extraneous characters and combinations,
hit
only one
key at a time on the small
PET
keyboard.
Be
especially careful when depressing
any of the
bottom
row
keys.
Three-key roi lover on the
PET
is
a desirable option,
but
as
the examples show, should not
be
depended upon for completely accurate
keyboard entry when typing
is
very fast or erratic.
173
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