diff options
Diffstat (limited to 'usr/build.sh')
| -rwxr-xr-x | usr/build.sh | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/usr/build.sh b/usr/build.sh index 93815d2..5d494cf 100755 --- a/usr/build.sh +++ b/usr/build.sh @@ -10,7 +10,12 @@ sdasgb -o "$B/crt0.rel" usr/crt0.s sdasgb -o "$B/libc.rel" usr/libc.s sdcc -msm83 -c -Iusr usr/libc.c -o "$B/libc_c.rel" sdcc -msm83 -c -Iusr "$SRC" -o "$B/prog.rel" -# link: crt0 first (=> _start at 0x4000), then libc, program, and sm83 lib +# link: crt0 first (=> _start at 0x4000), then libc, program, and sm83 lib. +# TRAP: only _CODE/_DATA have pinned bases. sm83.lib modules (long div/mod/ +# shift helpers) link into their own areas, which sdldgb places after _DATA - +# i.e. code in the $A000 RAM window ("buffer too small" from makebin, or +# garbage at runtime). Don't use long division/shifts in programs; see +# usr/uptime.c for the inlined-arithmetic workaround. sdldgb -n -m -w -j -i "$B/prog.ihx" \ -b _CODE=0x4000 -b _DATA=0xa000 \ -k "$LIBDIR" -l sm83 \ |