Fri, 12 Apr 2013 12:34:32 +0100
Fix read-after-write logic
In some cases (notably reading from a page after having written to it), the
mapper may change the pagestate from "accessed and written" ("dirty"; PS0,PS1)
to "accessed but not written" (clean; PS1,!PS0). This should never, ever, EVER
happen. Once a page is dirty, it remains so until the 68k clears the DIRTY
bit.
Once again, this wonderful bit of logic was missing from the TRM.
1 CC = gcc
2 WARNINGS = -Wall -pedantic
3 CFLAGS = $(WARNINGS) -c -Iobj -I. -I..
4 LFLAGS = $(WARNINGS)
6 all: obj sim
8 clean:
9 rm -rf obj
10 rm -f sim
12 obj:
13 mkdir obj
15 sim: obj/sim.o obj/m68kcpu.o obj/m68kops.o obj/m68kopac.o obj/m68kopdm.o obj/m68kopnz.o
16 $(CC) $(LFLAGS) obj/sim.o obj/m68kcpu.o obj/m68kops.o obj/m68kopac.o obj/m68kopdm.o obj/m68kopnz.o -o sim
18 obj/sim.o: sim.c sim.h ../m68k.h ../m68kconf.h
19 $(CC) $(CFLAGS) sim.c -o obj/sim.o
21 obj/m68kcpu.o: sim.h obj/m68kops.h sim.h ../m68k.h ../m68kconf.h
22 $(CC) $(CFLAGS) ../m68kcpu.c -o obj/m68kcpu.o
24 obj/m68kops.o: obj/m68kmake obj/m68kops.h obj/m68kops.c sim.h ../m68k.h ../m68kconf.h
25 $(CC) $(CFLAGS) obj/m68kops.c -o obj/m68kops.o
27 obj/m68kopac.o: obj/m68kmake obj/m68kops.h obj/m68kopac.c sim.h ../m68k.h ../m68kconf.h
28 $(CC) $(CFLAGS) obj/m68kopac.c -o obj/m68kopac.o
30 obj/m68kopdm.o: obj/m68kmake obj/m68kops.h obj/m68kopdm.c sim.h ../m68k.h ../m68kconf.h
31 $(CC) $(CFLAGS) obj/m68kopdm.c -o obj/m68kopdm.o
33 obj/m68kopnz.o: obj/m68kmake obj/m68kops.h obj/m68kopnz.c sim.h ../m68k.h ../m68kconf.h
34 $(CC) $(CFLAGS) obj/m68kopnz.c -o obj/m68kopnz.o
36 obj/m68kops.h: obj/m68kmake
37 obj/m68kmake obj ../m68k_in.c
39 obj/m68kmake: ../m68kmake.c ../m68k_in.c
40 $(CC) $(WARNINGS) ../m68kmake.c -o obj/m68kmake