From 8424286a3ea42dfc53b1f1d30c1af3e229b18301 Mon Sep 17 00:00:00 2001
From: Marco van den Heuvel <blackystardust68@yahoo.com>
Date: Fri, 23 Mar 2018 14:31:53 -0700
Subject: [PATCH] Add c16 files as well.

---
 libsrc/c16/fast.s   | 22 ++++++++++++++++++++++
 libsrc/c16/isfast.s | 22 ++++++++++++++++++++++
 libsrc/c16/slow.s   | 22 ++++++++++++++++++++++
 3 files changed, 66 insertions(+)
 create mode 100644 libsrc/c16/fast.s
 create mode 100644 libsrc/c16/isfast.s
 create mode 100644 libsrc/c16/slow.s

diff --git a/libsrc/c16/fast.s b/libsrc/c16/fast.s
new file mode 100644
index 000000000..e48813969
--- /dev/null
+++ b/libsrc/c16/fast.s
@@ -0,0 +1,22 @@
+;
+; Marco van den Heuvel, 2018-03-20
+;
+; void fast (void);
+; /* Switch the CPU into double clock mode. */
+;
+
+        .export         _fast
+
+        .include        "plus4.inc"
+
+
+.proc   _fast
+
+        lda     TED_CLK
+        and     #%11111101
+        sta     TED_CLK
+        rts
+
+.endproc
+
+
diff --git a/libsrc/c16/isfast.s b/libsrc/c16/isfast.s
new file mode 100644
index 000000000..ff104d97f
--- /dev/null
+++ b/libsrc/c16/isfast.s
@@ -0,0 +1,22 @@
+;
+; Marco van den Heuvel, 2018-03-20
+;
+; unsigned char isfast (void);
+; /* Returns 1 if the CPU is in double clock mode. */
+;
+
+        .export         _isfast
+
+        .include        "plus4.inc"
+
+
+.proc   _isfast
+
+        lda     TED_CLK
+        lsr
+        and     #$01
+        ldx     #$00
+        rts
+
+.endproc
+
diff --git a/libsrc/c16/slow.s b/libsrc/c16/slow.s
new file mode 100644
index 000000000..18b8c231c
--- /dev/null
+++ b/libsrc/c16/slow.s
@@ -0,0 +1,22 @@
+;
+; Marco van den Heuvel, 2018-03-28
+;
+; void slow (void);
+; /* Switch the CPU into single clock mode. */
+;
+
+        .export         _slow
+
+        .include        "plus4.inc"
+
+
+.proc   _slow
+
+        lda     TED_CLK
+        ora     #%00000010
+        sta     TED_CLK
+        rts
+
+.endproc
+
+
-- 
2.39.5