When migrating assembly language programs from one family of microcontrollers to another, the first ques- tion is almost always: “What’s the equivalent opcode?” Some operations, like addition and subtraction, are self-evident and practically universal. Other instruc- tions may have some subtle changes in syntax or spell- ing that make direct conversions a bit trickier. Occasionally, some instructions simply don’t have a direct equivalent in the target set, or an equivalent exists but is explained in different terms. TB071 Converting from Motorola HC08 to Microchip Assembler: A Quick Reference Author: Rodger Richey 2. Both Motorola and Microchip use a data mem- ory that is 8 bits wide. With their core architec- Microchip Technology Inc. ture, Motorola HC08 devices are also limited to When migrating assembly language programs from 8-bit wide program memories as well. Microchip one family of microcontrollers to another, the first ques- PICmicro devices, on the other hand, have pro- tion……