bryan@intvax.UUCP (Jon R Bryan) (02/26/91)
From article <157997@felix.UUCP>, by dennisg@felix.UUCP (Dennis Griesser): > I have a single-board computer from New Micros Inc, based on their forth > interpreter masked into the Motorola 68HC11. As a novice to forth, I have > enjoyed fiddling around with the thing. > > Now I would like to write some assembly-language routines for time-critical > work that can be called from forth. I have both the hardware manual (thin) > for the SBC and the 318-page MAX-FORTH reference manual, but neither gives > plain-English instructions for doing this. I suspect that a well-seasoned > forth user would find this documentation sufficient, but not me. I have > tried permutations of the following, to no avail: > CODE NAME1 01 END-CODE > CODE-SUB NAME2 01 39 END-CODE > (where the 01 is a NOP and 39 is RTS) > > I have already hand-assembled the (short) routines. I don't mind feeding > hex into the SBC. > > I have noticed other users of NMI forth on this board. Would anybody care to > explain how to hook in these routines? Thanks! Try this: HEX ( I don't have the manuals here, but I remember this constant ) ( being defined somewhere. The "easy" way to do this is to ) ( spend $50 on the assembler that NMI sells. ) ???? CONSTANT NEXT CODE NAME1 ( -- ) 01 C, ( NOP ) 7E C, ( JMP extended ) NEXT , END-CODE CODE-SUB NAME2 ( -- ) 01 C, ( NOP ) 39 C, ( RTS ) END-CODE ( If you have NMI's assembler it looks like this: ) CODE NAME1 ( -- ) NOP, NEXT JMP, END-CODE CODE-SUB NAME2 ( -- ) NOP, RTS, END-CODE -- Jon R. Bryan <=> bryan@intvax.UUCP Sandia National Laboratories Intelligent Machine Principles Division Albuquerque, New Mexico