mcrw@hobbit.gandalf.ca (Mark Woodward) (04/05/91)
Hi, I'm trying to compile a 6809 src file with the motorola cross assembler. I run across a small problem with SETDP $C0. The docs says that its not supported but to use the <> convention. Anyone got any ideas or a suggestion as to a work around. Everything else in the file compiles once I remove the SETDP. Any help would be appreciated.... --== Mark ==-- Disclaimer: 'You can take a horse to water... but a pencil must be lead!' ----------------------------------------------------------------------------- Gandalf Data Ltd. Tel: (613)723-6500 Ext 8702 130 Colonnade Rd S. Fax: (613)226-1717 Nepean, Ontario Canada K2E 7M4 email: mcrw@hobbit.gandalf.ca ---------------------------------------------------------------------------- -- Disclaimer: 'You can take a horse to water... but a pencil must be lead!' ----------------------------------------------------------------------------- Gandalf Data Ltd. Tel: (613)723-6500 Ext 8702
jal@acc.flint.umich.edu (John Lauro) (04/05/91)
In article <1991Apr4.201738.26003@hobbit.gandalf.ca> mcrw@hobbit.gandalf.ca (Mark Woodward) writes: > >Hi, > >I'm trying to compile a 6809 src file with the motorola cross assembler. >I run across a small problem with SETDP $C0. The docs says that its not >supported but to use the <> convention. Anyone got any ideas or a suggestion >as to a work around. Everything else in the file compiles once I remove the >SETDP. >Any help would be appreciated.... I don't understand the problem. Using SETDP is an optimization and most code that uses it, will work without it. (Removing the SETDP shouldn't cause any major problems, the final program will just be slightly larger and slower.) The work around is to use the <> convention on the instructions the assembler would have normally saved one byte on. (Of course, simply removing SETDP is also a work around.) Note: I haven't programmed the 6809 in about 3 years, and may be getting something confused. - John_Lauor@ub.cc.umich.edu
pete@wlbr.imsd.contel.com (Pete Lyall) (04/05/91)
What's the matter with using the '<' notation? Example
lda #PAGENUM
tfr a,dp
lda <5
or
lda #PAGENUM
tfr a,dp
lda <woof
The first will load the A register with location 5 from the 256 byte
page pointed to by the direct page register (DP).
The second does the same thing, only it uses the symbolic address
'woof'.
Pete Lyall
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