From ab276c733ce9dc80983e5c8ae5c530e1477cf990 Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Sun, 31 Mar 2024 23:10:44 +0300
Subject: implement more meta instructions

+ Also have a working draft of ABI names for registers, matches qbt
  currently but should probably codify somewhere
---
 tasm/os.tasm | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 tasm/os.tasm

(limited to 'tasm/os.tasm')

diff --git a/tasm/os.tasm b/tasm/os.tasm
new file mode 100644
index 0000000..164f9fe
--- /dev/null
+++ b/tasm/os.tasm
@@ -0,0 +1,17 @@
+// trivial stuff to make sure simulator exits once test program is run and
+// making sure our _start is the first thing in the object file
+_start:
+	// random starting stack location
+	li sp, 13122
+	mv fp, sp
+	call ra, main
+	li t0, 3
+	csrrw mpower, x0, t0
+
+// simple I/O
+_putchar:
+	li t0, 19683
+	st t a0, 0(t0)
+	ret ra
+
+// include the rest of the test program here, doesn't really matter how
-- 
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