Am 31.08.2013 22:21, schrieb Maarten Brock: > > For the 8051 bank switching is handled by crtbank.asm. But the calls are > generated by src/mcs51/gen.c. To add support for Z80 you'd have to modify > src/z80/gen.c. There is also support needed in src/z80/main.c to > compensate for the extra required stack space.
To anyone wanting to implement code bank switching for the Z80, I would suggest to implement it for the Rabbits first, since they have special call and return instructions for inter-bank calls. > > Named address spaces can provide data memory bank switching. Note that, while sdcc in many places handles code and constant data the same, this is not true here: Named address spaces will work with constant data. > This is not > implemented for 8051. AFAIR the named address spaces do not require support in the back-end, and should work with any port (but the function for switching between banks has to be supplied by the user). I currently don't see how it would be useful for the mcs51 though, unless someone uses custom bank hardware to extend the memory space. Philipp ------------------------------------------------------------------------------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58040911&iu=/4140/ostg.clktrk _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
