On Nov 22, 8:19, Eric Smith wrote:
> ard_at_p850ug1.demon.co.uk (Tony Duell) wrote:
> > Incidentally, back when Apple ][s were current it was generally claimed
> > in the UK that if you plugged anything but a colourcard into slot 7 you
> > would do serious damage to the machine. Looking at the schematics I
can't
> > see a reason why this will do any damage, but I've never had the
courage
> > to try it. Anyone know anything about this?
I remember being told that, and remember the sticker over Slot 7 (one of my
Europluses still has the sticker) but I don't know if there was any cause
for concern. I think the purpose of the sticker was simply to ensure
people left Slot 7 free in case a colour card was added later.
> Probably just an urban legend, like the ones about how all your memory
> chips need to be from the same vendor, and how they must all be the
> same speed, and how you shouldn't use 120 ns DRAMs in a computer designed
> for 150 ns DRAMs, and similar BS.
Probably. The only things different about Slot 7 are pins 19 and 35 --
which carry sync and color-ref signals from the motherboard to Slot 7, but
are unconnected on the other slots. According to the circuit diagram,
anyway. Unless some card used those pins for some non-standard purpose, it
shouldn't matter.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
Received on Mon Nov 22 1999 - 03:42:24 GMT