== Developing for FutureOS ==
You can developp very freely: the RSTs are free for use, you can choose the interrupt mode and access all the hardware. Also the second register set of the Z80 can be completely used by applications- in contrast to all other OS for the CPC.
*''Z80 Assembler:'' You can use an assembler for AmsDOS or for CP/M. Switching between AmsDOS and FutureOS is fast and using |FDESK allows to come back to AmsDOS with the first 48 KB or RAM remaining untouched. There is a Z80 library for FutureOS the programmer can use for own applications. In addition [[CBM]] can make applicatioin developpment easy and quick.