paulr@syma.sussex.ac.uk (Paul T Russell) (03/01/90)
I'm not sure whether this a simulator bug, a documentation bug, or what. The DSP 56001 manual says that an instruction of the form BTST #n,D is allowed, where #n is the bit number and D is a register. The assembler allows the instruction and generates the correct bits as per the manual. However the simulator complains that this is an illegal instruction and when I try to use it in my target system it bombs (although it's difficult to tell whether this is due to an illegal instruction or some other problem). The description for BTST in the manual is: "Bit Test on Memory", which makes me think that this may be a documentation bug which has been carried over into the assembler. -- Paul Russell, Department of Experimental Psychology University of Sussex, Falmer, Brighton BN1 9QG, England Janet: paulr@uk.ac.sussex.syma Nsfnet: paulr@syma.sussex.ac.uk Bitnet: paulr%sussex.syma@ukacrl.bitnet Usenet: ...ukc!syma!paulr
sdw@hpsad.HP.COM (Steve Warwick) (03/03/90)
You are running with an older version of the DSP56001. The manuel describes Rev. C of the Chip, But most systems still have rev. B. The Newer simulators wont balk on the instructions either. Call Motorola and have them send you the information which describes the differences from Rev B and Rev C.. Steve Warwick