Re: Blinking Light Apple II

["Michael J. Mahon" <mjmahon@aol.com>]

logjam wrote:
> About 100 man hours.
>
> http://www.stockly.com/images2/060129-LED_Display_Back_2716.jpg
>
> http://www.stockly.com/images2/060129-LED_Display_Front_2718.jpg
>
> Its the size of my couch!  I built it with the idea of displaying the
> actual memory in my Altair real-time, bit for bit on the wall.  That
> way you could watch programs running.  :)

A very nice display of computing activity is created by lighting
a single pixel (in the matrix of all addresses) where the PC is
and a single pixel where the data access is.  Loops are quite
visible, and the progression through data structures is clear.

Looking at the bits in memory (values) is not nearly so clear,
since most of the display is irrelevant to what is happening.

-michael

Music synthesis for 8-bit Apple II's!
Home page:  http://members.aol.com/MJMahon/

"The wastebasket is our most important design
tool--and it is seriously underused."