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Circuit Description

A demonstration of a 5x7 pixel dot-matrix display.

Please be patient when watching the applet. The 74590 counter is reset at the start of the simulation. As both the 7-bit ASCII and the 8-bit ISO-8859 character codes reserve the first 32 symbols for control characters (like Linefeed, Carriage-Return, Bell, or Escape), nothing is displayed during the first few clock cycles. The alphanumerical character codes start at index 32 (space).