diff options
Diffstat (limited to 'agbx/source/gfx/vsync.s')
-rw-r--r-- | agbx/source/gfx/vsync.s | 37 |
1 files changed, 0 insertions, 37 deletions
diff --git a/agbx/source/gfx/vsync.s b/agbx/source/gfx/vsync.s deleted file mode 100644 index e16724f..0000000 --- a/agbx/source/gfx/vsync.s +++ /dev/null @@ -1,37 +0,0 @@ -@ 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>. - -.syntax unified - -.cpu arm7tdmi -.thumb - -.globl ax_vsync - -.func -.thumb_func - -ax_vsync: - @ Set the constants: - ldr r0,.vcountaddr @ ax_i02 vcountaddr = 0x4000006u; - movs r1,0xA0 @ ax_i02 numhline = 0xA0; - -.loop: - @ Check the scanline counter: - ldrh r2,[r0] @ ax_i02 vcount = *(ax_i01 *)vcountaddr; - cmp r2,r1 - beq .ret @ if (vcount == numhline) {goto ret;} - - b .loop @ goto loop; - -.ret: - @ Return: - bx lr @ return; - -.endfunc - -.align - -.vcountaddr: - .long 0x4000006 |