A1200 PCMCIA SLOT BEING NAUGHTY..................

[kelvin1200]

Hi everyone this is just a quick question concerning my pcmcia slot and a lan card.
when the card is in and i do a cold boot it just refuses to boot. even the hard drive wont spin but as soon as i eject the card the hard drive starts and my miggy boots fine.then i have to put the card in.
i've soldered on the capacitor but its just the same.also the screen image is just black so it tells me no hardware faults.
please help as i dont fancy fiddling around the back of my tower which is in my desk, everytime i turn it on.
well so much for being a quick note !!
thanks for reading and i hope someones got some thoughts on this.

[ncafferkey]

I think I've seen a card that behaved like this in an early revision A1200, but not in a later revision. You might have to get a different card.

[Doobrey]

What LAN card is it?
And more importantly, is it listed as a known working card by whatever driver you're using (cnet/3com/prism ?)

[Doobrey]

ncafferkey wrote:
I think I've seen a card that behaved like this in an early revision A1200, but not in a later revision. You might have to get a different card.

You may well be onto something there Neil. AFAIK, there are at least 2 versions of the AA Gayle, but I dunno what they changed/fixed with it.

[kelvin1200]

thanks for your replys.
the card is 3com megahertz model :-3cce589et
i purchased from ebay with drivers.
the card works fine i've got my lan connected up and transfering etc with babyftp software (no problems at all)
its just from a cold boot, (the a1200 harddrive doesnt do a thing until you eject the card) even a reset is fine

[avanham]

Maybe try using CardReset from Aminet.   Put it in your startup-sequence and it resets the PCMCIA slot to make up for the 1200's faulty reset line on that slot.  I use a 3Com and it boots fine with the card installed.

[ncafferkey]

avanham wrote:
Maybe try using CardReset from Aminet.   Put it in your startup-sequence and it resets the PCMCIA slot to make up for the 1200's faulty reset line on that slot.  I use a 3Com and it boots fine with the card installed.

The hard drive doesn't spin up, so software can't be run. In any case, this looks like a different problem to that solved by CardReset.

[kelvin1200]

Just done a bit of browsing and found this schematic of the pcmcia on 1200. http://amiga.emugaming.com/pcmciascheme.gif
as you can see pin 5 of gayle goes directly to the R715Y so why do some people suggest putting a cap between them ?
Is it to allow for an incorrect track on the mobo or is it to delay the reset signal from Gayle for a few milliseconds.  
would i be better of just using a jumper wire straight to pin 58 of the pcmcia slot ?  :-D

Also i have got 2 other 1200 mobo's and one of them has got different numbers on most of the chips (still says ver 2B) and its got some great big black resistors near the power in area instead of the big doughnut any thoughts ?
are these better or worse.

[Doobrey]

kelvin1200 wrote:
as you can see pin 5 of gayle goes directly to the R715Y so why do some people suggest putting a cap between them ?
Is it to allow for an incorrect track on the mobo or is it to delay the reset signal from Gayle for a few milliseconds.  
would i be better of just using a jumper wire straight to pin 58 of the pcmcia slot ?  :-D

Nope. the tracks on the motherboard are fine, the problem is Gayle doesn't generate the reset signal on startup. BTW, that pic is slightly wrong, the CC_Reset is active high, not active low as the '_' prefix suggests, that resistor is just a pulldown to make sure there are no false resets generated.

The fact your HD doesn't spin up is worrying, I thought IDE drives always spun when powered up until they were told to sleep, could it be a weak PSU?
 You could try removing the HD and any CPU card , plug the network card in and see if it gets to the purple insert disk screen.

BTW, those 'big black resistors' are just axial ferrites to filter out any noise on the power lines, if they went wrong you'd have bigger problems than this.