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Author Topic: Current rating of A1200 /SEL1 external select signal  (Read 692 times)

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Offline HodgkinsonTopic starter

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Current rating of A1200 /SEL1 external select signal
« on: February 01, 2008, 04:41:17 PM »
Hi there,
Im working on a variant of the ATX PSU power off modification, and im looking for the current pull-down rating of pin 21 of the A1200 external floppy port - The /SEL1 OC Output. Anyone any ideas?

EDIT: Eg, What would be the lowest safe recommended pull-up resistor value when fed with the +5v feed on the same port?

Thanks in advance,
Hodgkinson.
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Offline HodgkinsonTopic starter

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Re: Current rating of A1200 /SEL1 external select signal
« Reply #1 on: February 01, 2008, 05:28:25 PM »
:bump:
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Offline HodgkinsonTopic starter

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Re: Current rating of A1200 /SEL1 external select signal
« Reply #2 on: February 01, 2008, 06:25:34 PM »
I've managed to find a datasheet for the 6526, but I can't find one for the 8520. If it had data in with regards to the output drive specifications that would be just as useful, if not more useful :-)
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Main A1200D: WB3.0, 3.1 ROMs, 2GB HDD, Blizzard 1230IV (64MB RAM + FPU) and a whole load of custom heatsinks... :flame:
 
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