3 files changed, 87 insertions, 0 deletions
diff --git a/agbx/source/bs/done.c b/agbx/source/bs/done.c
new file mode 100644
index 0000000..afac799
--- /dev/null
+++ b/agbx/source/bs/done.c
@@ -0,0 +1,34 @@
+/*
+	Copyright 2022 Gabriel Jensen.
+	This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+	If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <agbx/priv.h>
+
+void agbx_done(agbx_err const _err) {
+	if (_err == agbx_err_ok) {
+		__asm__ (
+			"swi 0x3\n"
+		);
+		__builtin_unreachable();
+	}
+	/* Display the barcode-like error message: */
+	agbx_set10(0x4000000u,0x403u);
+	agbx_i10 err[0x8u];
+	for (agbx_i8 pos = 0x0u;pos != 0x8u;++pos) {err[pos] = (agbx_i8)_err >> pos & 0x1u ? 0xFFFFu : 0x0u;}
+	for (agbx_i10 pos = 0x0u;pos != 0x9600u;pos += 0xF0u) {
+		agbx_setpx2(pos,       err[0x0u]);
+		agbx_setpx2(pos + 0x1u,err[0x1u]);
+		agbx_setpx2(pos + 0x2u,err[0x2u]);
+		agbx_setpx2(pos + 0x3u,err[0x3u]);
+		agbx_setpx2(pos + 0x4u,err[0x4u]);
+		agbx_setpx2(pos + 0x5u,err[0x5u]);
+		agbx_setpx2(pos + 0x6u,err[0x6u]);
+		agbx_setpx2(pos + 0x7u,err[0x7u]);
+	}
+	__asm__ (
+		"swi 0x2\n"
+	);
+	for (;;) {}
+}
diff --git a/agbx/source/bs/get.c b/agbx/source/bs/get.c
new file mode 100644
index 0000000..38da5af
--- /dev/null
+++ b/agbx/source/bs/get.c
@@ -0,0 +1,40 @@
+/*
+	Copyright 2022 Gabriel Jensen.
+	This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+	If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <agbx/priv.h>
+
+agbx_i10 agbx_get10(agbx_i20 const _addr) {
+	agbx_i10 val;
+	__asm__ ( \
+		"ldrh %0,[%1]"
+		: "=r" (val)
+		: "r" (_addr)
+		: "memory"
+	);
+	return val;
+}
+
+agbx_i20 agbx_get20(agbx_i20 const _addr) {
+	agbx_i20 val;
+	__asm__ ( \
+		"ldr %0,[%1]"
+		: "=r" (val)
+		: "r" (_addr)
+		: "memory"
+	);
+	return val;
+}
+
+agbx_i8 agbx_get8(agbx_i20 const _addr) {
+	agbx_i8 val;
+	__asm__ ( \
+		"ldrb %0,[%1]"
+		: "=r" (val)
+		: "r" (_addr)
+		: "memory"
+	);
+	return val;
+}
diff --git a/agbx/source/bs/set.c b/agbx/source/bs/set.c
new file mode 100644
index 0000000..8aa9976
--- /dev/null
+++ b/agbx/source/bs/set.c
@@ -0,0 +1,13 @@
+/*
+	Copyright 2022 Gabriel Jensen.
+	This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+	If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <agbx/priv.h>
+
+void agbx_set10(agbx_i20 const _addr,agbx_i10 const _val) {__agbx_set10(_addr,_val)}
+
+void agbx_set20(agbx_i20 const _addr,agbx_i20 const _val) {__agbx_set20(_addr,_val)}
+
+void agbx_set8(agbx_i20 const _addr,agbx_i8 const _val) {__agbx_set8(_addr,_val)}