Steve,
     
     See my AT keyboard viewer code for a PIC16C84 - This takes codes from 
     the keyboard, and using a look-up table in program ROM converts it to 
     ASCII and words, to display on an LCD.
     
     http://ourworld.compuserve.com/homepages/steve_lawther/keybinfo.htm 
     
     Also a load of links for more info.
     
                Steve Lawther


______________________________ Reply Separator _________________________________
Subject:      PIC or SBC?
Author:  MIME:classics@NACS.NET at INTERNET-HUSKY
Date:    18/09/97 20:21

Hello,
     
        I recently did a few projects w/ the 16c84 from Microchip, and I
 want to use a PIC to interface an AT keyboard to a computer that uses a
 8x8 matrix keyboard.   To do it I need at least 7 i/o lines for the matrix, 
 2 for the AT keyboard, and enough accessable ram/eprom for a lookup
 table to translate the AT scancodes to the 8x8 matrix.
     
        I also need some RAM to store the make/break state of the keys, not
 alot but enough to buffer keystrokes as they come in, and remove them 
 when lifted.
     
        What microcontroller should I use?  It would be possible w/ a
 10mhz 16c84 if it had enough EEDATA to store the lookup table, since its 
 limited SRAM is probably enough for the buffer.  Is there any way to read 
 the program ee area from within the program?  That might make it possible.
     
        Are there any other PIC's I might consider?   The only one I have
 ever done any projects with so far is the 16c84.
     
     <snip>