Front panel switches - what did they do?

Jon Elson elson at
Tue May 24 11:51:41 CDT 2016

On 05/24/2016 11:34 AM, William Donzelli wrote:
>> The improved reliablity of LSI logic over discrete and SSI, and the creation of ROM chips of reasonable capacity (to hold the bootstrap or a monitor), would bring about the demise of the blinkenlight  front panel.
>> Note that only a couple of the first microcomputers had blinkenlight front panels, and they were pretty much gone from minis and mainframes by the late-70s.
The early PDP-11s had a diode matrix ROM for the boot 
memory.  You could change the boot code with a wire cutter 
and soldering iron.


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