mirror of
https://github.com/ApacheThunder/NTR_Launcher.git
synced 2025-06-19 03:25:38 -04:00
a4e5a00409
* Stage2 launcher UI added. This is a heavily modified HBMenu with ability to launch carts! This menu can be used to boot a bootloader NDS file for flascharts that the direct cart launcher fails to boot. * New audio files added for new menu. * HBMenu UI loaded by default if booted with no cart inserted. * INI file folder now located in NTR_Launcher folder instead. A default ini file from NitroFS (if mount of nitrofs succeeds) will be copied to SD if one is not present. * Stage2 launchers are expected to be in NTR Launcehr folder though you can navigate to any folder you want in the UI so stage2 launchers aren't the only thing this can be used for. You can also use this as a means of booting homebrew off SD in NTR mode.
71 lines
1.8 KiB
ArmAsm
71 lines
1.8 KiB
ArmAsm
/*-----------------------------------------------------------------
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Copyright (C) 2005 Michael "Chishm" Chisholm
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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If you use this code, please give due credit and email me about your
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project at chishm@hotmail.com
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------------------------------------------------------------------*/
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.arm
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.global arm7clearRAM
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.type arm7clearRAM STT_FUNC
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arm7clearRAM:
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push {r0-r9}
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// clear exclusive IWRAM
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// 0380:0000 to 0380:FFFF, total 64KiB
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mov r0, #0
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mov r1, #0
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mov r2, #0
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mov r3, #0
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mov r4, #0
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mov r5, #0
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mov r6, #0
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mov r7, #0
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mov r8, #0x03800000
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sub r8, #0x00008000
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mov r9, #0x03800000
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orr r9, r9, #0x10000
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clear_IWRAM_loop:
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stmia r8!, {r0, r1, r2, r3, r4, r5, r6, r7}
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cmp r8, r9
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blt clear_IWRAM_loop
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// clear most of EWRAM - except after RAM end - 0xc000, which has the bootstub
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mov r8, #0x02000000
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ldr r9,=0x4004008
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ldr r9,[r9]
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ands r9,r9,#0x8000
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bne dsi_mode
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mov r9, #0x02400000
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b ds_mode
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dsi_mode:
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mov r9, #0x03000000
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ds_mode:
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sub r9, #0x0000c000
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clear_EWRAM_loop:
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stmia r8!, {r0, r1, r2, r3, r4, r5, r6, r7}
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cmp r8, r9
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blt clear_EWRAM_loop
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pop {r0-r9}
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bx lr
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