Parallax BASIC Stamp 1, Programming Manual

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5: BASIC Stamp Command Reference – WRITE
BASIC Stamp Programming Manual 2.0c
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•
Page 329
WRITE
BS1 BS2 BS2e BS2sx BS2p
WRITE Location, DataItem
Function
Write DataItem into Location in EEPROM.
•
Location
is a variable/constant/expression (0 – 255 on BS1, 0 – 2047
on all other BASIC Stamps) that specifies the EEPROM address to
write to.
•
DataItem
is a variable/constant/expression specifying the value to
be stored.
Quick Facts
BS1 BS2 BS2e, BS2sx BS2p
Range of
EEPROM
locations
0 to 255 0 to 2047 0 to 2047
0 to 2047
(see notes below)
Maximum
number of
writes per
location
10 million 10 million 100,000 100,000
Special
notes
n/a n/a
WRITE only works
with current
program slot on
BS2e and BS2sx.
WRITE works with
any program slot as
set by
the STORE
command.
Explanation
The EEPROM is used for both program storage (which builds downward
from address 255 on BS1, 2047 on all other BASIC Stamps) and data
storage (which builds upward from address 0). The WRITE instruction
stores a byte of data to any EEPROM address. Any location within the
EEPROM can be written to (including your PBASIC program's locations)
at run-time. This feature is mainly used to store long-term data from
EEPROM; data stored in EEPROM is not lost when the power is removed.
The following WRITE command stores the value 245 at location 100:
1 2
e
2
sx
2
p
2
1
NOTE: Expressions are not
allowed as arguments on the BS1.
A
SIMPLE
WRITE
COMMAND
.
Table 5.94: WRITE Quick Facts.