added a testprogram to check for some of the edge cases

test/asm/val/Makefile

@@ -0,0 +1,58 @@
+# Makefile for the regression tests that return an error code on failure
+
+ifneq ($(shell echo),)
+  CMD_EXE = 1
+endif
+
+ifdef CMD_EXE
+  S = $(subst /,\,/)
+  NULLDEV = nul:
+  MKDIR = mkdir $(subst /,\,$1)
+  RMDIR = -rmdir /s /q $(subst /,\,$1)
+else
+  S = /
+  NULLDEV = /dev/null
+  MKDIR = mkdir -p $1
+  RMDIR = $(RM) -r $1
+endif
+
+ifdef QUIET
+  .SILENT:
+  NULLOUT = >$(NULLDEV)
+  NULLERR = 2>$(NULLDEV)
+endif
+
+SIM65FLAGS = -x 5000000000
+
+CA65 := $(if $(wildcard ../../../bin/ca65*),..$S..$S..$Sbin$Sca65,ca65)
+LD65 := $(if $(wildcard ../../../bin/ld65*),..$S..$S..$Sbin$Sld65,ld65)
+SIM65 := $(if $(wildcard ../../../bin/sim65*),..$S..$S..$Sbin$Ssim65,sim65)
+
+WORKDIR = ../../testwrk/asm/val
+
+.PHONY: all clean
+
+SOURCES := $(wildcard *.s)
+TESTS  = $(SOURCES:%.s=$(WORKDIR)/%.6502.prg)
+TESTS += $(SOURCES:%.s=$(WORKDIR)/%.65c02.prg)
+
+all: $(TESTS)
+
+$(WORKDIR):
+	$(call MKDIR,$(WORKDIR))
+
+define PRG_template
+
+$(WORKDIR)/%.$1.prg: %.s | $(WORKDIR)
+	$(if $(QUIET),echo asm/val/$$*.$1.prg)
+	$(CA65) -t sim$1 -o $$(@:.prg=.o) $$< $(NULLERR)
+	$(LD65) -C sim6502-asmtest.cfg -o $$@ $$(@:.prg=.o) sim$1.lib $(NULLERR)
+	$(SIM65) $(SIM65FLAGS) $$@ $(NULLOUT)
+
+endef # PRG_template
+
+$(eval $(call PRG_template,6502))
+$(eval $(call PRG_template,65c02))
+
+clean:
+	@$(call RMDIR,$(WORKDIR))