Enviroment:
To run utilities like make, rm, e.t.c you may install cygwin, too. Cygwin home

SDCC-M08 Download Files:

SDCC-M08-v006.zip - Compiler Source (4.7Mo, Released: 2004-03-25)
SDCC-M08-lib-v019.zip - Executables for Windows + HC08 C Library + Example projects (1.9Mo, Released: 2005-06-19)