sdcc -c -DSFR_CODE_LOC=0x7ff8 -DXRAM_CODE_LOC=0x2000 8052.c
8052.c:203: warning 185: comparison of 'signed char' with 'unsigned char' requires promotion to int
sdcc -c cmon51.c
sdcc -c d51.c
sdcc -c step.c
sdcc --code-size 0x2000 --xram-loc 0x1f00 --xram-size 0x100 8052.rel cmon51.rel d51.rel step.rel
?ASlink-Error-Could not get 20 consecutive bytes in internal RAM for area DSEG.
make: *** [8052.hex] Fehler 1