diff options
Diffstat (limited to 'agbx/source/gfx/getvbnk.s')
| -rw-r--r-- | agbx/source/gfx/getvbnk.s | 62 |
1 files changed, 0 insertions, 62 deletions
diff --git a/agbx/source/gfx/getvbnk.s b/agbx/source/gfx/getvbnk.s deleted file mode 100644 index d3dcbcf..0000000 --- a/agbx/source/gfx/getvbnk.s +++ /dev/null @@ -1,62 +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_getvbnk -.globl ax_getvbnk - -.func -.thumb_func - -ax_getvbnk: - @ Get the current value of dispcnt: - ldr r0,.dispcntaddr @ ax_i02 dispcntaddr = 0x4000000u; - ldrh r1,[r0] @ ax_i01 dispcnt = *(ax_i01 *)dispcntaddr; - - @ Get the address: - b __ax_getvbnk @ ax_i02 vaddr = __ax_getvbnk(); - - bx lr @ return vaddr; - -.endfunc - -.func -.thumb_func - -__ax_getvbnk: @ Takes the value of dispcnt in r1. - @ Check if the fifth bit is set: - movs r0,0b10000 - tst r1,r0 - beq .vbnk1 - -.vbnk0: - @ Return the address of the first video bank: - ldr r0,.vbnk0addr - bx lr - -.vbnk1: - @ Return the address of the second video bank: - ldr r0,.vbnk1addr - bx lr - -.endfunc - -.align - -.dispcntaddr: - .long 0x4000000 - -.align - -.vbnk0addr: - .long 0x6000000 - -.align - -.vbnk1addr: - .long 0x600A000 |