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lecture02 Manorathan Indran s conflicted copy 2012-02-07 Muk...
lecture02_Manorathan_Indran_s_conflicted_copy_2012-02-07_Mukul_Patel_s_conflicted_copy_2012-03-20.ppt
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lecture02 Manorathan Indran s conflicted copy 2012...
lecture02_Manorathan_Indran_s_conflicted_copy_2012-02-07_Mukul_Patel_s_conflicted_copy_2012-03-20.ppt-Jie Hu, ECE/NJIT, Spring 2011 ECE252
lecture02 Manorathan Indran s confl...
lecture02_Manorathan_Indran_s_conflicted_copy_2012-02-07_Mukul_Patel_s_conflicted_copy_2012-03-20.ppt-Jie Hu, ECE/NJIT, Spring 2011 ECE252
Page 23
Jie Hu, ECE/NJIT, Spring 2011
ECE252 L02-68000 Arch.23
ASCII Code Chart
ASCII code: American Standard Code for Information
Exchange
Page 24
Jie Hu, ECE/NJIT, Spring 2011
ECE252 L02-68000 Arch.24
ASCII Code Chart
Code in range $00 to $1F: Control characters
NUL (null)
TAB (horizontal tab)
- Moves the cursor (or print head) right to the next
tab stop.
The spacing of tab stops is dependent
on the output device, but is often either 8 or 10.
LF
(NL line feed, new line)
- Moves the cursor (or print head) to a new
line.
On Unix systems, moves to a new line
AND all the way to the left.
CR
(carriage return)
- Moves the cursor all the way to the left, but
does not advance to the next line.
Code in range $20 to $7F: readable characters
$30-$39: numbers: 0, 1, …, 9
$41-$5A: Roman alphabet in upper case: A, B, …, Z
$61-$7A: Roman alphabet in lower case: a, b, …, z
Page 25
Jie Hu, ECE/NJIT, Spring 2011
ECE252 L02-68000 Arch.25
ASCII Code Chart: Control Code
Control characters
NUL (null)
SOH (start of heading)
STX (start of text)
ETX (end of text)
EOT (end of transmission) - Not the same as ETB
ENQ (enquiry)
ACK (acknowledge)
BEL (bell) - Caused teletype machines to ring a bell.
Causes a beep in many
common terminals and terminal emulation programs.
BS
(backspace) - Moves the cursor (or print head) move backwards (left) one
space.
TAB (horizontal tab)
- Moves the cursor (or print head) right to the next tab stop.
The spacing of tab stops is dependent on the output device, but is often either 8
or 10.
LF
(NL line feed, new line)
- Moves the cursor (or print head) to a new line.
On
Unix systems, moves to a new line AND all the way to the left.
VT
(vertical tab)
FF
(form feed) - Advances paper to the top of the next page (if the output device
is a printer).
CR
(carriage return)
- Moves the cursor all the way to the left, but does not
advance to the next line.
Page 26
Jie Hu, ECE/NJIT, Spring 2011
ECE252 L02-68000 Arch.26
ASCII Code Chart: Control Code
SO
(shift out) - Switches output device to alternate character set.
SI
(shift in)
- Switches output device back to default character set.
DLE (data link escape)
DC1 (device control 1)
DC2 (device control 2)
DC3 (device control 3)
DC4 (device control 4)
NAK (negative acknowledge)
SYN (synchronous idle)
ETB (end of transmission block) - Not the same as EOT
CAN (cancel)
EM
(end of medium)
SUB (substitute)
ESC (escape)
FS
(file separator)
GS
(group separator)
RS
(record separator)
US
(unit separator)
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