> However, I don't know what you mean about the "programmer's > range" To minimise programming time the PS+ upper limit was set to 2ff, not the full fff. The dt addition I made at 0x600 was therefore not programmed into the chip, so there were no retlws for the calls to bounce back from -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist