. RS232C. D ( , ), , . RS232C, .
. RS232C .
. , RS232C. , DTE DCE.
. ( MARK SPACE) . , .
. . , , , , .
. . MARK SPACE, , .
8. -.
- (Communication Port - ) IBM PC. Intel 8250. BIOS (// 74/?), ( ) . PC , i8250. PC- () 58051 - 18251. - ( USART - Universal Asynchronous Receiver-Transmitter). PC - . , "" BIOS // 14h, , " " . - . BIOS // 14h, . - PC, i8250 RS-232C.
-
- (, ). ; . - Serial Mouse - . DB-9S-DB-25P DB-25S-DB-9P. , 1 - IRQ4, COM2 - IRQ3. IRQ . - - RS-232C. ; (. 2.3).
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Serial Mouse - MS-Mouse PC-Mouse (Mouse Systems Mouse) - , MS/PC. "" , "" . : 1200 /, - Microsoft Mouse 7 , a PC-Mouse - 8 . - , . , MS-Mouse, (. 2.4). PC-Mouse 5 (. 2.5). LB (Left Buttom), MB (Middle Buttom) RB (Right Buttom) , , [7:0] Y[7:0] - Y. , Y MS-Mouse PC-Mouse. .
D6 | D5 | D4 | D3 | |||||
1- | LB | RB | Y7 | Y6 | 7 | 6 | ||
2- | 5 | 4 | 2 | 1 | ||||
3- | Y5 | Y4 | Y3 | Y2 | Y1 | YO | ||
03 | 02 | 01 | DO | |||||
1- | LB | MB | RB | |||||
2- | 7 | 6 | 5 | 4 | 2 | 1 | ||
3- | Y7 | Y6 | Y5 | Y4 | Y3 | Y2 | Y1 | YO |
4- | 2- | |||||||
5- | 3- |
(9-) -, . 2.7. ( ); 9-25, . , () . 9600 / , - UART 16550A . FIFO- DMA .
, , - - (. 2.8). Norton Commander Interink MS-DOS 115,2 / . Lantastic, .
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- , : XON/XOFF RTS/CTS. . 2.10 2.12. . DOS ( COPY PRINT) .
- (Security Devices), . "", , .
- PC , (VT-52, VT-100 . .). , BIOS - (INT 14h), (// 10h) (INT 16h). (,, Pentium), BIOS , .
RS-232C . - , 3 4 - . . , , - , PC, -. PC . , PC, , .
- - IR (Infra Red) Connection. , , . ( 115,2 /), (1,152 /) (4 /) . , - , , , . . , " ". 1993 IrDA (Infrared Data Association), . IrDA 1.1. Hewlett Packard - HP-SIR (Hewlett Packard Slow Infra Red) - Sharp - ASK (Amplitude Shifted Keyed IR). :
Ø IrDA SIR (Slow Infra Red), HP-SIR - 9,6-115,2 /;
Ø IrDA MIR (Middle Infra Red) - 1,2 /;
Ø IrDA FIR (Fast Infra Red) - 4 /;
Ø + Sharp ASK - 9,6-57,6 /.
115 200 / UART, 16450/16550. COM2. - " ", IR-Connector .
, - DMA .
. - , . -. .
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2.6. - (Checkit) .
UART ( ) , , . , /, UART. , (. 2.17). LPT- - , . . RTSCTS - . DTR DSR, DCD RI.
, , . . :
1. ( , , , ).
2. TD, RTS DTR: TD -12 ( -5 ), RTS DTR - . , . :
Ø ;
Ø ( );
Ø .
, . . 2.1 10- -, ; - . , .
, ( ). , , .