Notes & Errata for the EA Eprom Programmer,
                       Described in EA, September 1993.
                ============================================

    The  eight LED's buffered by U8 (74HC245)  can  draw  considerable  rail
    current (>60mA) when switched at the same time. This has caused reported
    problems with CMOS 27C128 Eproms.   However, it is very likely that this
    can  cause problems with other Eprom  type's  as  well.   It  is  highly
    recommended to change the eight LED dropper resitors (R37-R44) from 390ê
    to >1Kê.

    Even  if you are not having any problems at present,  this  modification
    should be carried out,  as the value of 390ê for the LED droppers is far
    to  low for this application.   Another option is to  remove  the  LED's
    altogether,  as they do not serve much useful purpose,  other  than  for
    debugging.

    The above reported problem was the same with both my own PCEB programmer
    software,  and Glen Pure's software.  Both of which were reviewed in the
    November 1994 issue of EA.

    Regards,

    David L. Jones
    TRONNORT Technology
    12 Copeland Road
    Lethbridge Park NSW 2770.

    April 8th, 1995.