I've identified all but two bits in the word value that results from register use. The obvious ones are: R0-R7 DPH DPL PSW ACC B CY These are assigned to the lower 14 bits of the word (order unimportant for this discussion) None of the registers listed above account for bits 14 and 15 of the word (most significant two bits). Does anyone know what these represent?
Bit 15 indicates that at least 1 register is used (if another bit is set). If Bit 15 is set and no other bits are set, this indicates that NO registers are used. Bit 14 is reserved for use by the compiler. Jon
Thanks Jon. No hint on what bit 14 is used for? ;) I guess if there's no REGUSE symbol for it, it doesn't matter anyway.
Bit 14 is reserved for use by the compiler. [No hint on what bit 14 is used for? ;) "reserved" usually mean "some day in the future we may use it" Erik