At 09:29 21/07/99 -0700, you wrote: >> I finished a program that is working in a prototype circuit with a PIC 16C >> 74B JW. >> As the program uses only I/O , not A/D I intend to program a PIC 16C 64A >> 20/P. >> Is enough to change in the (Promate II device Programmer) window of MPLAB >> 4.0 from >> 74B to 64A ? > >I've done it using a '65 instead of a '74 no problem. > >Cheers, >Bob I would compare the price of a '64A against the price of a '65B. You might be surprised! On price alone the 65B may be the best option. The 65B is a 74B without the A/D. A 64A is not quite the same as there are differences in other peripherials and, of course the 64A is only 2k as opposed to the 4k 74A. But if the program fits and you are not using other peripherials then the 64A is entirely suitable as a replacement. Jim ________________________________________ Email: newfound@pipeline.com.au http://www.new-elect.com MPLAB compatible PIC programmers and firmware upgrades for many programmers. ________________________________________