Vt100 , apories !!!!!

[Nick Stivaktakis]

----------
> From: Alexios Chouchoulas <alexios at vennea.demon.co.uk>
> To: linux-greek-users at argeas.argos.hol.gr
> Subject: Re: Vt100 , apories !!!!!
> Date: 6 June 1997 05:49
> 
> On Thu, 5 Jun 1997, Physics_UID wrote:
> 
> > Ti einai to null modem ??  
> > H sindesi den mporei na ginei apeu0ias, apo ti mia seiriaki toy pc
> > stin alli seiriaki toy vt100 ?????????
> 
>   Apeftheias ginetai h syndesh! To null modem einai apla eidos kalwdiou
> (kanei tis dyo akres ths seiriakhs na pistevoun oti einai kai oi dyo
> syndedemenes se modems pou epikoinwnoun). Apo texnikhs plevras, null
>  modem cable einai to kalwdio pou syndeei dyo DTE h dyo DCE syskeves
> (bl. alla mhnymata gia ekshghseis peri DTE/DCE).
----------

Sumfwnw kai epaujanw...

H seiriakh *TOY PC* exei ta parakatw pins:

| *** 25-pin connector ***
| 
| Pin	Description				I/O		code
|  1		Frame Ground
|  2		Serial Data			Output	TxD
|  3		Serial Data			Input		RxD
|  4		Request to Send		Output	RTS
|  5		Clear to Send		Input		CTS
|  6		Data Set Ready		Input		DSR
|  7		Signal Ground (Common Return)
|  8		Data Carrier Detect	Input		DCD
|  9-19	Not used
| 20		Data Terminal Ready	Output	DTR
| 21		Not used
| 22		Ring Indicator		Input		RI
| 23-25	Not used


To kalwdio null-modem kanei tis parakatw sundeseis:

|  'Null-Modem' RS232 cable
| 
|  2(TxD) ----->-----  3(RxD)
|  3(RxD) -----<-----  2(TxD)
| 
|  5(CTS) -----<----- 20(DTR)
| 20(DTR) ----->-----  5(CTS)
| 
|  4(RTS) -->-|
|  6(DSR) --<-|
|  8(DCD) --<-|
| 
|               |-<--  4(RTS)
|               |->--  6(DSR)
|               |->--  8(DCD)
| 
|  7(GRN) -----------  7(GRN)

Einai loipon gia na sundeei tis seiriakes twn *PCs* metaji tous.

H seiriakh tou VT100 den exei ta parapanw pins. (Gia na sugoureuteis
des to manual...an uparxei...) Ta exei etsi topothethmena wste gia na
sundeseis ena PC me ena VT100 arkei na baleis ena kalwdio pou na
sundeei to pin#1 me to #1, to #2 me to #2, to #3 me to #3, ktlp. Oxi
null-modem loipon.

Auta ...
Elpizw na bohthhsa kai 'gw.


PS: Kai mhn jexnate:  http://www.des.sollentuna.se/
    Katebaste to client kai spaste kai 'seis kanena key-block.
    Se ligo, etsi opws pame, tha poune oti espasan to DES-56bit-key
    ths RSA, ta WINDOWS 95 !!!


Nick Stivaktakis <SigmaN at her.FORTHnet.GR>

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