From: Bryan Pope (bpope_at_wordstock.com)
Date: 2003-09-30 20:50:42
And thusly retroreplay-admin@webnova.de spake:
>
> At 18:53 30.09.2003 +0200, you wrote:
>
> >I bought a Datalux SV-703 cartridge expander in the hope of being able to
> >use my RetroReplay/RR-Net combo together with my 512K REU, but so far
> >they're not happy together.
>
> You might have a power problem there. The 512K REU takes quite a bit of
> current, and the Retro Replay with RR-Net also takes more than 1 Watt power.
>
> >The expander has three ports and a switch that switches +5V (pins 2 & 3,
> >which are shorted on the card edge), GAME (pin 8) and EXROM (pin 9). All
> >other pins on all ports stay connected all the time.
>
> That's *nearly* OK, not sure how RR/REU reacts when IO1 and IO2 is
> connected on both ends. Give IO2 (df00) to the REU and IO1 (de00) to the
> Retro Replay, this will work. I do not have an expander like that, so
> someone else will have to give it a try.
>
> >I use a PAL C128 with JiffyDOS if that makes any difference.
>
> C128 has a power problem in itself. The ground noise between far off ground
> points is up to 0.7 volts (measured between corners of the board). Make
> sure that the metal shield is in place, and the screw hold it on the PCB -
> it's not only for shielding, but also to connect ground points in the
> corners. I know some peope who have removed it, and experience problems
> with the computer since then, especially with cartridges.
> The C128 power supply is a bit better than the C64's (2.5A on +5V instead
> of 1.5A). However, maybe not enough to supply everything you got there,
> especially because your PSU is getting old, Capacitors might have dried out
> and noise on the +5V line is getting higher.
>
> > Message was sent through the cbm-hackers mailing list
>
> Hope this gets back there; I'm not on that list. I'm also sending this to
> Niklas Ramsberg's private eMail, but it would be nice if someone on this
> list could share his experience with REU and RR.
>
> ciao,
> --
> Jens Schönfeld
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