[nostalgia] Break part of core out into Turbine and TeaGBA libraries

deps/teagba/src/bios.s

@@ -0,0 +1,37 @@
+//
+// Copyright 2016 - 2023 gary@drinkingtea.net
+//
+// 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 http://mozilla.org/MPL/2.0/.
+//
+
+.section .iwram, "ax", %progbits
+.thumb
+.align
+
+.global teagba_halt
+.type teagba_halt, %function
+teagba_halt:
+	swi 2
+	bx lr
+
+.global teagba_stop
+.type teagba_stop, %function
+teagba_stop:
+	swi 3
+	bx lr
+
+.global teagba_intrwait
+.type teagba_intrwait, %function
+teagba_intrwait:
+	swi 4
+	bx lr
+
+.global teagba_vblankintrwait
+.type teagba_vblankintrwait, %function
+teagba_vblankintrwait:
+	swi 5
+	bx lr
+
+// vim: ft=armv4