Character Buffer - Sharp CE-158 Instruction Manual

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6. Character buffer
Received data and key input data during ECHO ON is stored in the memory of the computer
(which is a part of the user's area that is not used for the program area and variablP. area)
called a character buffer. Size of this character buffer must be more than 570 bytes. It will
r~ult
in ERROR 51 unless this size are a were not secured.
BASIC p rogram
Character buffer
Varia ble
In such an event. it needs to clear variables using the CLEAR statem ent or to clear
the
6ASIC
p rogram and variables using the NEW stateme nt. If
it
is un dcrsierable to c lear. save such vafi·
ables and program on t he cassette tape via the CE· 150.
The fo llowing maximum capacity w i ll
be
avai lable for the character buffer when the NE'vV
statem.ent has beer' executed.
1792
5888 (4 KRAM moduleCE-151, in use)
9984 (8 KRAM module CE-1 55 in use)
Data are stored in the character buffer from the youngest ntemo riy addn?ss. and incoming
data chases out the o ldest d a ta when the c haracte r buffer becomes f· u lly o ccup ie d, so that the
la test d ata will remain in the charactet
buffer at
any t ime.
Char. a cter buffer
1-,-'--- -- -- - - - - --·-----;_ 1 3__,
Newest data
\ _ , Oldest data
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