Gordon JC Pearce
gordon at gjcp.net
Thu Nov 30 05:47:04 CST 2006
Jules Richardson wrote:
> Sure - although a lot of Atoms out there don't seem to have the
> expansion connector fitted (IIRC there are typically a couple of ICs
> that they need too). The Atom Disc Pack (as you probably know) was just
> a drive and a System-era FDC in a single case, plugged into the Atom's
> expansion port).
I still have my (almost) fully-loaded Atom, salvaged from the junk pile
at my Dad's work over 20 years ago. The bottom of the case is rather
scorched where the PSU heatsink has been struggling with all those
2114s! I'm guessing that's why they wanted rid of it - it ran for about
5 minutes then would shut down because the regulators were overheating.
I remember him being rather concerned about how hot his bench PSU was
getting when running it, and eventually it clicked that if it was
pulling down 3.5A from the thing then there was no way two 7805s would
ever handle the strain.
Then, of course, the unheeded technical manual turned up. I had a quick
look, and right in the first few pages it mentions removing the
regulators and bypassing them and then putting a *BIG* label on the back
saying that it's for 5v now, not 9v...
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