The last version of RASM is v0.105 (2nd January 2019). This multi platform assembler/disassembler (linux, windows, but not only like MorphOS on Amiga) let you program for Amstrad CPC.
The online documentation is available.
- do not allow CALL (IX) or CALL (IY) syntax
- added comments begining with //
- added SIZEOF support for fields of structures
- new directive TICKER to count instruction duration