diff --git a/scripts/target/mame/tiny.lua b/scripts/target/mame/tiny.lua
index e1eb60dbcae..c1ee27b7277 100644
--- a/scripts/target/mame/tiny.lua
+++ b/scripts/target/mame/tiny.lua
@@ -67,6 +67,7 @@ MACHINES["NETLIST"] = true
 MACHINES["OUTPUT_LATCH"] = true
 MACHINES["PIT8253"] = true
 MACHINES["RIOT6532"] = true
+MACHINES["SEGACRPT"] = true
 MACHINES["TICKET"] = true
 MACHINES["TIMEKPR"] = true
 MACHINES["TTL74148"] = true
diff --git a/src/lib/util/ioprocsvec.h b/src/lib/util/ioprocsvec.h
index 27dda095ad3..d3c1c7fe01b 100644
--- a/src/lib/util/ioprocsvec.h
+++ b/src/lib/util/ioprocsvec.h
@@ -188,7 +188,8 @@ private:
 		{
 			actual = std::size_t(limit - offset);
 			std::memmove(reinterpret_cast<std::uint8_t *>(m_storage.data()) + offset, buffer, actual);
-			m_size = limit;
+			if (limit > m_size)
+				m_size = limit;
 		}
 		else
 		{
diff --git a/src/tools/floptool.cpp b/src/tools/floptool.cpp
index e39273e0a12..4ca0c39b1ca 100644
--- a/src/tools/floptool.cpp
+++ b/src/tools/floptool.cpp
@@ -542,7 +542,7 @@ static int generic_write(image_handler &ih, const char *srcpath, const char *dst
 		auto dpath = path;
 		dpath.pop_back();
 		err = fs->file_create(dpath, meta);
-		if(!err) {
+		if(err) {
 			fprintf(stderr, "File creation failure.\n");
 			return 1;
 		}
@@ -550,7 +550,7 @@ static int generic_write(image_handler &ih, const char *srcpath, const char *dst
 
 	auto dfork = image_handler::fload(srcpath);
 	err = fs->file_write(path, dfork);
-	if(!err) {
+	if(err) {
 		fprintf(stderr, "File writing failure.\n");
 		return 1;
 	}