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-rw-r--r--sw/z80/kernel/include/types.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/sw/z80/kernel/include/types.h b/sw/z80/kernel/include/types.h
index c24b311..552b7e9 100644
--- a/sw/z80/kernel/include/types.h
+++ b/sw/z80/kernel/include/types.h
@@ -1,6 +1,8 @@
#ifndef __TYPES_H__
#define __TYPES_H__
+#define register_t volatile unsigned char
+
#define int8_t char
#define uint8_t unsigned char
#define int16_t int