Hello Gerrit! 08 Jul 96, Gerrit Gehnen writes to all: P> Now to the difficult part: To aviod an additional power supply i want P> to use the design of a RS232-attached programmer. Has someone P> experience with this design and in circuit programming? Try to look at http://www.ormix.riga.lv/eng/mchip/c1.htm This is RS232-attached programmer without additional power supply, program all serial PIC's and I2C NVRAM's (16C6X/7X/8X/14XXX/24CXX) and have in-circuit programming capability. Alexej Vladimirov avlad@mail.ormix.riga.lv --- GoldED/2 2.50+