IMPORTANT NOTE
==============
PIC DUAL CHANNEL VSCOPE

Since going to press with the PIC Dual Channel VScope
(EPE Oct. 2000), the device specified for IC3, TC55257-DPL
(and its alternative TC55257-DPI) has become obsolete.

The author has proved that the NEC device UPD43256 BCZ-70LL
is a satisfactory replacement and is available from
Electromail (the mail order division of RS Components Ltd.)
as code number 265-465. It is also considerably cheaper.

Do not attempt to use any other variant of the TC55257 as it
may have a different pin configuration.

John Becker
EPE Technical Editor

13th September 2000