diff --git a/.gitattributes b/.gitattributes
index 11655e2d770..4aa685b34b9 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -54,6 +54,7 @@ icu4c/source/samples/ucnv/data02.bin -text
 icu4c/source/test/testdata/importtest.bin -text
 icu4c/source/test/testdata/iscii.bin -text
 icu4c/source/test/testdata/testdata_icu26_testtypes.res -text
+icu4c/source/test/testdata/testdata_icu26e_testtypes.res -text
 icu4c/source/test/testdata/uni-text.bin -text
 icu4j/src/com/ibm/icu/dev/data/ThaiWordFreq.xls -text
 icu4j/src/com/ibm/icu/dev/data/holidays_jp.ucs -text
diff --git a/icu4c/source/data/Makefile.in b/icu4c/source/data/Makefile.in
index 952422b88f2..d5e14eeecd4 100644
--- a/icu4c/source/data/Makefile.in
+++ b/icu4c/source/data/Makefile.in
@@ -335,7 +335,7 @@ TEST_UCM_FILES=$(TEST_UCM_SOURCE:%=$(TESTSRCDATADIR)/data/%)
 TEST_CNV_FILES=$(TEST_UCM_SOURCE:%.ucm=$(TESTBUILDDIR)/$(TESTDT)%.cnv)
 
 TEST_RES = casing.txt mc.txt root.txt te.txt te_IN.txt testtypes.txt testaliases.txt testempty.txt DataDrivenCollationTest.txt idna_rules.txt conversion.txt testtable32.txt
-TEST_RES_FILES=$(TEST_RES:%.txt=$(TESTBUILDDIR)/$(TESTDT)%.res) $(TESTBUILDDIR)/$(TESTDT)iscii.res $(TESTSRCDATADIR)/$(TESTDT)icu26_testtypes.res
+TEST_RES_FILES=$(TEST_RES:%.txt=$(TESTBUILDDIR)/$(TESTDT)%.res) $(TESTBUILDDIR)/$(TESTDT)iscii.res $(TESTSRCDATADIR)/$(TESTDT)icu26_testtypes.res $(TESTSRCDATADIR)/$(TESTDT)icu26e_testtypes.res
 
 ALL_TEST_FILES = $(TEST_DAT_FILES) $(TEST_BRK_FILES) $(TEST_CNV_FILES) $(TEST_RES_FILES) $(TESTOUTDIR)/$(TESTDT)nam.typ
 
diff --git a/icu4c/source/test/cintltst/udatatst.c b/icu4c/source/test/cintltst/udatatst.c
index 50ff188cf72..23d4f5d5471 100644
--- a/icu4c/source/test/cintltst/udatatst.c
+++ b/icu4c/source/test/cintltst/udatatst.c
@@ -1040,8 +1040,10 @@ static const struct {
     /* ICU's root */
     "root",                     "res", ures_swap,
 
-    /* ICU 2.6 resource bundle - data format 1.0, without indexes[] */
+    /* ICU 2.6 resource bundle - data format 1.0, without indexes[] (little-endian ASCII) */
     "*icu26_testtypes",         "res", ures_swap,
+    /* same for big-endian EBCDIC */
+    "*icu26e_testtypes",        "res", ures_swap,
 
 #if !UCONFIG_NO_COLLATION
     /* standalone collation data files */
diff --git a/icu4c/source/test/testdata/testdata.mk b/icu4c/source/test/testdata/testdata.mk
index dec25163b56..0a3b56695e4 100644
--- a/icu4c/source/test/testdata/testdata.mk
+++ b/icu4c/source/test/testdata/testdata.mk
@@ -20,10 +20,14 @@ ALL : "$(TESTDATAOUT)\testdata.dat"
 # and CollationElements (which will not work with a newer swapper)
 # markus 2003nov19
 
+# icu26e_testtypes.res is the same, but icuswapped to big-endian EBCDIC
+# markus 2003nov21
+
 "$(TESTDATAOUT)\testdata.dat" : "$(TESTDATABLD)\casing.res" "$(TESTDATABLD)\conversion.res" "$(TESTDATABLD)\mc.res" "$(TESTDATABLD)\root.res" "$(TESTDATABLD)\te.res" "$(TESTDATABLD)\te_IN.res" "$(TESTDATABLD)\testaliases.res" "$(TESTDATABLD)\testtypes.res" "$(TESTDATABLD)\testempty.res" "$(TESTDATABLD)\$(TESTDT)iscii.res" "$(TESTDATABLD)\$(TESTDT)idna_rules.res" "$(TESTDATABLD)\DataDrivenCollationTest.res" "$(TESTDATABLD)\$(TESTDT)test.icu" "$(TESTDATABLD)\$(TESTDT)testtable32.res" "$(TESTDATABLD)\$(TESTDT)test1.cnv" "$(TESTDATABLD)\$(TESTDT)test3.cnv" "$(TESTDATABLD)\$(TESTDT)test4.cnv" "$(TESTDATABLD)\$(TESTDT)test4x.cnv" "$(TESTDATABLD)\$(TESTDT)ibm9027.cnv" "$(TESTDATABLD)\$(TESTDT)nfscsi.spp" "$(TESTDATABLD)\$(TESTDT)nfscss.spp" "$(TESTDATABLD)\$(TESTDT)nfscis.spp" "$(TESTDATABLD)\$(TESTDT)nfsmxs.spp" "$(TESTDATABLD)\$(TESTDT)nfsmxp.spp"
 	@echo Building test data
 	@copy "$(TESTDATABLD)\$(TESTDT)te.res" "$(TESTDATAOUT)\$(TESTDT)nam.typ"
 	@copy "$(TESTDATA)\$(TESTDT)icu26_testtypes.res" "$(TESTDATABLD)"
+	@copy "$(TESTDATA)\$(TESTDT)icu26e_testtypes.res" "$(TESTDATABLD)"
 	@"$(ICUP)\bin\pkgdata" -f -v -m common -c -p"$(TESTPKG)" -d "$(TESTDATAOUT)" -T "$(TESTDATABLD)" -s "$(TESTDATABLD)" <<
 $(TESTDT)casing.res
 $(TESTDT)conversion.res
@@ -34,6 +38,7 @@ $(TESTDT)te.res
 $(TESTDT)te_IN.res
 $(TESTDT)testtypes.res
 $(TESTDT)icu26_testtypes.res
+$(TESTDT)icu26e_testtypes.res
 $(TESTDT)testempty.res
 $(TESTDT)testaliases.res
 $(TESTDT)iscii.res
diff --git a/icu4c/source/test/testdata/testdata_icu26e_testtypes.res b/icu4c/source/test/testdata/testdata_icu26e_testtypes.res
new file mode 100644
index 00000000000..89acde07914
Binary files /dev/null and b/icu4c/source/test/testdata/testdata_icu26e_testtypes.res differ