Hardware variant to VNC including power button (was: RE: fyi 8255 PPI card [was Re: TightVNC 1.2.3 released])

"Beerse, Corné" cbeerse "at" hiscom.nl
Tue, 26 Mar 2002 13:40:59 +0000


<commercial-mode>
If you happen to run some Compaq servers, have a look at the Remote
Management http://www.compaq.com/manage/remotemgmt.html boards. I happen to
work with the Remote Insight Board
(http://www.compaq.com/manage/remote-lightsout.html). It provides something
similar as VNC does. Some of the advantages are a remote floppy and a remote
reset button. If it has external power, it has even a remote power button.
The major disadvantage is the horrible performance, specially compared to
VNC ;-)
<\commercial-mode>

Success,

CBee

> -----Original Message-----
> From: Mark.Reeder "at" reuters.com [mailto:Mark.Reeder "at" reuters.com]
> Sent: Tuesday, March 26, 2002 2:04 PM
> To: vnc-list "at" uk.research.att.com
> Subject: fyi 8255 PPI card [was Re: TightVNC 1.2.3 released]
> 
> 
> On 25/03/2002 20:18:50 Bryan Fields wrote:
> >
> > The way I fixed this, is to put a 8255 Peripheral 
> controller card in both
> > computers, and wire one logic from each card to the other 
> computers reset
> > line.  Then you can ssh/vnc into one and reboot it proper.  
> If it hangs, then
> > connect to the other computer and "push" the reset button 
> for the computer
> > that is locked up.
> 
> There are plenty of references on the web for this
> 
>  e.g.
> 
> a) see http://www.boondog.com/%5Ctutorials%5C8255%5C8255.htm 
> [QBasic code]
>  [Turbo Pascal http://www.u-net.com/epr/electron/issue1/feat0706.htm]
> [Basic/Pascal/C  http://www.pci8255.com/isa_8255_card.htm or 
> http://www.pci8255.com ]
> 
> b) if you do not have have ISA slots in each required 
> computer and trip over this sort of thing:
> "The PCI bus operates at 33MHz and this too fast for the 8255 
> chip, which functions at 5MHz."
>  don't worry as there are PCI versions too...
>  e.g. http://www.pci8255.com
>      
http://www.lavalink.com/LIBRARY/DOCS/MANUALS/8255-PIO%20manual.pdf

c) find some spare time

d) map U.S. suppliers onto whatever you can get in your neck of the woods

e) build, dbeug, debug, ... and enjoy


If you feel cheated that you end up with 16 leds hidden away inside each PC
where the sun doesn't shine much,
you could install a very small low-light internet camera inside each PC ...
;-}

Mark

p.s.
If you are really intimate with hardware, you will enjoy
(especially the BlueTooth reference [0077] :-}  in )
http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=
1&u=/netahtml/PTO/srchnum.html&r=1&f=G&l=50&s1='20020028988'.PGNR.&OS=DN/200
20028988&RS=DN/20020028988



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