diff --git a/include/libg1m/format/cas.h b/include/libg1m/format/cas.h
index 8b3fb4a..8f677ac 100644
--- a/include/libg1m/format/cas.h
+++ b/include/libg1m/format/cas.h
@@ -43,10 +43,8 @@ struct cas_header {
 
 /* For a program, the specific bytes are the following: */
 
-# define casiolink_program_uk0     0x01 /* <unknown> */
 # define casiolink_program_stats   0x02 /* store stats data */
 # define casiolink_program_matrix  0x04 /* matrix mode */
-# define casiolink_program_uk1     0x08 /* <unknown */
 # define casiolink_program_stddev  0x10 /* standard deviation mode */
 # define casiolink_program_linreg  0x20 /* linear regression mode */
 # define casiolink_program_basen   0x40 /* base-n mode */
diff --git a/include/libg1m/format/std/storage.h b/include/libg1m/format/std/storage.h
index 204faa4..0991c18 100644
--- a/include/libg1m/format/std/storage.h
+++ b/include/libg1m/format/std/storage.h
@@ -152,7 +152,8 @@ struct storage_file {
  * probably detected when the file is transferred. Here are the
  * known values: */
 
-# define g1m_storage_filetype_unknown  0x01
+# define g1m_storage_filetype_regular  0x01
+# define g1m_storage_filetype_unknown  g1m_storage_filetype_regular
 # define g1m_storage_filetype_addin    0x02 /* G1A */
 # define g1m_storage_filetype_mcs      0x06 /* G1M */
 # define g1m_storage_filetype_g2r      0x2E /* G1R */
diff --git a/src/decode/mcs/spreadsheet.c b/src/decode/mcs/spreadsheet.c
index 22168af..feb6fba 100644
--- a/src/decode/mcs/spreadsheet.c
+++ b/src/decode/mcs/spreadsheet.c
@@ -33,13 +33,11 @@ int g1m_decode_mcs_spreadsheet(g1m_mcsfile_t **handle, g1m_buffer_t *buffer,
 {
 	/* read header */
 	DREAD(hd, mcs_spreadsheetheader)
-	logm_info(&hd, sizeof(struct mcs_spreadsheetheader));
 	if (hd.has_subheader != 0x01)
 		return (0);
 
 	/* read subheader */
 	DREAD(shd, mcs_spreadsheet_subheader)
-	logm_info(&shd, sizeof(struct mcs_spreadsheet_subheader));
 	uint_fast32_t colcount = hd.column_count;
 	colcount = be32toh(colcount << 8);
 	shd.defs_size = be32toh(shd.defs_size);
diff --git a/src/type/mcs.c b/src/type/mcs.c
index 7bf4105..3662d7b 100644
--- a/src/type/mcs.c
+++ b/src/type/mcs.c
@@ -144,6 +144,8 @@ static struct group_corresp mcs_groups[] = {
 		TTERM
 	}},
 	{"S-SHEET", noarg, (struct type_corresp[]){
+		{0xFE, "@SNAME", 0, "@SSHEET",
+			"spreadsheet name?", 0x00},
 		{0xFE, NULL, 0, "@SSHEET",
 			"spreadsheet", g1m_mcstype_spreadsheet},
 		TTERM
@@ -163,6 +165,11 @@ static struct group_corresp mcs_groups[] = {
 			"econ3 data", 0x00},
 		TTERM
 	}},
+	{"ECON4_", arg | arg_is_num, (struct type_corresp[]){
+		{0xFE, "Econ4N", arg | arg_is_num, "@E-CON2",
+			"econ4 data", 0x00},
+		TTERM
+	}},
 	{"FINANCIAL", noarg, (struct type_corresp[]){
 		{0xFE, NULL /* "fina_mem" */, 0, "@FINANCE",
 			"financial data", 0x00},
@@ -185,6 +192,35 @@ static struct group_corresp mcs_groups[] = {
 			"range data?", 0x00},
 		TTERM
 	}},
+	{"3DGRAPH", noarg, (struct type_corresp[]){
+		{0xFE, NULL /* AREACOL */, 0, "@3DGRAPH",
+			"???", 0x00},
+		{0xFE, NULL /* LINECOL */, 0, "@3DGRAPH",
+			"???", 0x00},
+		{0xFE, NULL /* SELECT */, 0, "@3DGRAPH",
+			"???", 0x00},
+		{0xFE, NULL /* TEMPLATE */, 0, "@3DGRAPH",
+			"???", 0x00},
+		{0xFE, NULL /* SETUP */, 0, "@3DGRAPH",
+			"???", 0x00},
+		{0xFE, NULL /* TYPE */, 0, "@3DGRAPH",
+			"???", 0x00},
+		{0xFE, NULL /* VWIN */, 0, "@3DGRAPH",
+			"???", 0x00},
+		{0xFE, "Z", arg | arg_is_num /* 1 to 3 */, "@3DGRAPH",
+			"???", 0x00},
+		TTERM
+	}},
+	{"@GEOM", noarg, (struct type_corresp[]){
+		{0xFE, NULL, 0, "@GEOM",
+			"???", 0x00},
+		TTERM
+	}},
+	{"@PROBSIM", noarg, (struct type_corresp[]){
+		{0xFE, NULL /* ProbRand */, 0, "@PROBSIM",
+			"???", 0x00},
+		TTERM
+	}},
 
 	/* terminating entry */
 	{NULL, 0, NULL}