From 509c3aeb568821fbde76ffe6c0ebb327fcd043c0 Mon Sep 17 00:00:00 2001 From: PikalaxALT Date: Sun, 7 Jul 2019 21:07:40 -0400 Subject: Stack-free IWRAM clear --- src/main.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) (limited to 'src') diff --git a/src/main.c b/src/main.c index 75845213f..5cb8039c7 100644 --- a/src/main.c +++ b/src/main.c @@ -93,7 +93,20 @@ void AgbMain() // Modern compilers are liberal with the stack on entry to this function, // so RegisterRamReset may crash if it resets IWRAM. RegisterRamReset(RESET_ALL & ~RESET_IWRAM); - DmaFill32(3, 0, (void *)0x03000000, 0x7E00); + asm("mov\tr1, #0xC0\n" + "\tlsl\tr1, r1, #0x12\n" + "\tmov r2, #0xFC\n" + "\tlsl r2, r2, #0x7\n" + "\tadd\tr2, r1, r2\n" + "\tmov\tr0, #0\n" + "\tmov\tr3, r0\n" + "\tmov\tr4, r0\n" + "\tmov\tr5, r0\n" + ".LCU0:\n" + "\tstmia r1!, {r0, r3, r4, r5}\n" + "\tcmp\tr1, r2\n" + "\tbcc\t.LCU0\n" + ); #else RegisterRamReset(RESET_ALL); #endif //MODERN -- cgit v1.2.3