Re: SPAMVERDACHT:RE: weird cables question

From: Groepaz (
Date: 2004-01-15 10:23:53

On Thursday 15 January 2004 09:56, Baltissen, GJPAA (Ruud) wrote:
> Hallo Cameron,
> > I don't think this will short out two Commodores with their joyports
> > connected with one. Does anyone know?
> A DB9 null-modem cable only has lines 2, 3 and 5. This means no ground.

mmmh... are there really still these cheap 3wire thingies sold? i would
assume them having atleast rts/cts aswell, maybe also dcd/dtd.

> Connecting two C64 with this cable won't destroy them but I won't be the
> one to try it.
> > Would a straight-through wired DE9-DE9 male-male be safer?
> No. This means you connect both the +5V power supplies with each others.
> You run a risk to blow one.

mmmh no, you probably wont blow the powersupplies ... but the possible difference
in static voltage potential/level is always a problem when you connect two devices
that way. (ie, its always recommended to connect ground, but not the VCC). it
might result into strange behaviour with the two circuits in the powersupplies
trying to regulate the current coming from each other :)


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