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, 24 . L3 , , . L2.
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(American Standard Code for Information Interchange), 1963 , 128 . ASCII- :
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0 lAh. 7Fh. . . 1.1. - ( ).
1.1. ASCII-
00h NUL
01h SOH
02h STX
03h ETX
04h EOT
05h ENQ
06h ACK
07h BEL ( )
08h BS (
)
09h HT
OAh LF
OBh VT
OCh FF (
)
ODh CR
OEh SO
OFh SI
10h DLE
11h DC1 1
12h DC2 2
13h DC3 3
14h DC4 4
15h NAK
16h SYN
17h ETB
18h CAN
19h EM
1Ah SUB ( )
1Bh ESC
1Ch FS
4. 1Dh GS
1 Eh RS
1 Fh US
7Fh DEL
32 0040:001E. 15 , , ASCII - ( , 16- , <Enter>, COMMAND.COM). ASCII, - - . 0, . - , , .
, FIFO ( - ). , . , . , , - , (.. ). , ( ), . , , ; , , .
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IBM AT PS/2 Intel 8042. , , PS/2. , ( ), i8042 [57, 69, 70, 79, 98].
: , . , i8042 IRQ.1, IRQ12. , . PS/2 . 1.
60h. . , ( PS/2-) i8042. - .
. , , .
1
64h. . 2. :
0 (0 , 1 );
1 (0 , 1 );
2 (0 , 1 );
3 (0 , 1 );
4 (0 , 1 );
5 - - (0 , 1 ); PS/2- (0 , 1 );
6 - - (0 , 1 ); - PS/2- (0 , 1 );
7 (0 , 1 ).
5. 
2
9
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