Hallo Nick,
> I was thinking to simply use a DIODE and have the device
> drive the line high when not needed.
That's OK. This is the same way the XE1541-interface works.
> I can never remember which way to face the DIODE
|\ |
| \ |
device ----+ >+---- CNT1 / SP1
| / |
|/ |
The cathode (the black line at the top of the triangle) is marked as a black
band around the diode (silver when diode is black itself). For speed reasons
you better can use so-called Scottky-diodes (spelling ??).
> but do you think that this will be enough to avoid
> pulling on CNT1 and SP1?
See first remark.
___
/ __|__
/ / |_/ Groetjes, Ruud
\ \__|_\
\___| http://Ruud.C64.org
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