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I am using the 24 bit addressing mode with a Dallas 80C390 ... there is a bug in the silicon that causes an ACALL to not work if it falls within a few bytes of a 64K boundary ... is there a way to make sure the compiler does not put code near these 64K boundaries?
It is the Linker's job to assign addresses, so I'd look to the Linker manual. On the other hand, could you use the _at_ keyword extension to place some dummy data there - thus ensuring that code won't go there, and so avoiding the error?
Or do not use ACALL at all. If you're using 24 bit addressing, you must have enough code space for a few hundred bytes more when LCALLs are used.