From ba2d7ae1d7b319645b10aaa31a7f664f9f80c25c Mon Sep 17 00:00:00 2001
From: user <user@clank>
Date: Sat, 18 Jul 2026 00:38:38 +0200
Subject: refactor: c/ -> usr/, compiled program blobs out of the source tree

Userland sources live in usr/ (fits the Unix theme better than 'c').
SDCC output .bin blobs land in build/usr/ with the other build artifacts
instead of littering the source dir; programs.asm INCBINs them from there.
Byte-identical ROM.
---
 usr/crt0.s | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 usr/crt0.s

(limited to 'usr/crt0.s')

diff --git a/usr/crt0.s b/usr/crt0.s
new file mode 100644
index 0000000..0d8371f
--- /dev/null
+++ b/usr/crt0.s
@@ -0,0 +1,11 @@
+	.module crt0
+	.globl _main
+	;; gbos C entry. exec() maps our ROM bank and jumps here ($4000).
+	;; Call main(), then exit(0). (Args are fetched on demand via getargs().)
+	.area _CODE
+_start::
+	call	_main
+	ld	b, #0
+	ld	c, #0			; SYS_EXIT
+	rst	#0x30
+1$:	jr	1$
-- 
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