While you work with D52.exe that instruction will work because D52 generates rb0r1,rb0r2 type code for register and manual itself says that to convert rb0r1 type code you can utilise the r directive in control file.Now you work with d48.exe.It generates r0,r1 type code for registers.And there is no discription about this in the manual.I think this may generate error while you working with d48.exe.So I think you go through the manual first.


Edit:
http://www.bipom.com/documents...directives