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{
    "title": "Mac LC III",
    "tags": ["retrocomputing"],
    "date": "2014-06-07"
}

[Back to my retrocomputing collection](..)

## The System


	
33Mhz 68030


## Log


	
*2000-ish* Bought from $15 from a thrift store.
	
*2011-ish* Chipped from 25Mhz to 33Mhz.


## Upgrades

[Chipped from 25Mhz to 33Mhz](http://homepage.mac.com/schrier/lciii.html) by
moving R14 to R74.  The speedup was noticable.

After upgrade, stable but 68030 runs hot.  If this concerns you, add a heat
sink.  Height is an issue if there is a card in the PDS slot.  Hard to fit more
than a 7mm tall heat sink.  I added a 35x35x7 adhesive heat sink (part
#371824B00032G from [mouser.com](http://www.mouser.com)).

## Re-capping

    5 10uF 16V
    1 100uF 6.3V
    5 47uF 16V

## Software

Running MacOS System 7.5.5.

## Documentation

## Networking


	
Enable OpenTransport (open <tt>/Apple Extras/Network Software Selector</tt>, and then <tt>Use Open Transport Networking</tt>.)
	
Use an a hub that can do 10Mb/s.  My card, at least, is not 10/100, so you need an honest-to-dog 10Mb/s or 10/100Mb/s hub.
	
To make troubleshooting easier, go to <tt>Apple menu : Control Panels : TCP/IP</tt>, then <tt>Edit : User Mode</tt> and select <tt>Advanced</tt>.  This will give you an extra <tt>Options...</tt> button; in here, uncheck <tt>Load only when needed</tt>.  This will cause your Mac to do a DHCP request immediately.  Back on the main TCP/IP window, see if you then get an IP, see if you can ping it, etc.
	
Configure netatalk on a Linux server, or enable sharing on an old PPC Mac.


## References