4. ASCII TABLE Parallel (Centronics)
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0 1 2 3 4 5 6 7
0 NUL 0 @ P ` p
1 SOH XON ! 1 A Q a q
2 STX “ 2 B R b r
3 XOFF # 3 C S c s
4 $ 4 D T d t
5 NAK % 5 E U e u
6 ACK & 6 F V f v
7 BEL ‘ 7 G W g w
8 BS ( 8 H X h x
9 ) 9 I Y i y
A LF * : J Z j z
B ESC + ; K [ k {
C FF , < L \ l |
D CR - = M ] m }
E SO RS . > N ^ n ~
F SI US / ? O _ o DEL
The parallel port is a standard 36-pin Centronics. Its pin assignments are
listed as following.
Pin Direction Definition Pin Direction Definition
1 In /STROBE 13 Out SELECT
2 In Data 1 14,15 NC
3 In Data 2 16 - Ground
4 In Data 3 17 - Ground
5 In Data 4 18 NC
6 In Data 5 19~30 - Ground
7 In Data 6 31 NC
8 In Data 7 32 Out /Fault
9 In Data 8 33~36 - NC
10 Out /ACK
11 Out BUSY
12 Out PE
Auto Polling
Both the serial and parallel ports are active at the same time on this
printer, i.e. data can be received on either one, however no provision is
made for port contention. If data is transmitted to both ports
simultaneously, it will cause the data in the received buffer to be
corrupted.
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