1 files changed, 25 insertions, 0 deletions
diff --git a/c/libc.s b/c/libc.s
index c245bbd..d499521 100644
--- a/c/libc.s
+++ b/c/libc.s
@@ -221,3 +221,28 @@ _bpeek2:
 	rst	#0x30
 	ret
 
+
+	.globl _mkdir, _chdir
+	;; unsigned char mkdir(const char *path /*DE*/) -> A (0 ok / $FF)
+_mkdir:
+	ld	c, #25			; SYS_MKDIR
+	rst	#0x30
+	ret
+	;; unsigned char chdir(const char *path /*DE*/) -> A (0 ok / $FF)
+_chdir:
+	ld	c, #26			; SYS_CHDIR
+	rst	#0x30
+	ret
+
+	.globl _opendir
+	;; unsigned char opendir(const char *path /*DE*/) -> A (0 ok / $FF)
+_opendir:
+	ld	c, #27			; SYS_OPENDIR
+	rst	#0x30
+	ret
+
+	.globl _poweroff
+	;; void poweroff(void) - execute the emulator's clean-exit opcode ($ED)
+_poweroff:
+	.db	0xED
+1$:	jr	1$