In SX Microcontrollers, SX/B Compiler and SX-Key Tool, g_daubach wrote:

Hi,

1)
Due to the internal structure (12 bits per instruction code), the SX does not allow for instructions to directly move a constant value into a register, or for moving the contents of one register into another. So, the W register will have to be used as temporary buffer.

Actually, instead of

mov w,#%11111110
mov !rb, w

you can say

mov !rb, #%11111110

i.e. use a so-called "multi-word", or "compound" instruction. As the SX can't execute this as "native" instruction, SASM automatically translates this into two separate instructions, i.e. into

mov w,#%11111110
mov !rb, w

2)
Select "Help" and then "SX/B" in the SX-Key IDE, any you will enter into an excellent help text, created by Jon Williams

3)
Hey, I noticed that Jon was faster this time - so I have nothing to add to his advise.

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