Hi Cassie PICSTART PLUS uses a 25MHz crystal (33MHz will do as well). Christof On 29 Sep 97 at 13:23, : Cassie Carstens wrote: > Hi > With the MPLAB3.3 upgrade they advice you to upgrade PICSTART > PLUS FIRMWARE. > >............. > Updating PICSTART Plus Firmware: > > Required Equipment: > > 1. Currently operating Picstart Plus Programmer with MPLAB Software. > 2. Erased PIC17C44 microcontroller. > 4. PSF12000.HEX file. > 3. Phillips head screwdriver. > > Procedure: > >............. > > My vendor wants to know what speed 17C44 ?? > Does anybody know please? > > Kind Regards > CC > >