chore: zero-initialize VRAM

This commit is contained in:
Rekai Nyangadzayi Musuka 2022-01-30 02:39:16 -04:00
parent b0332e6eb8
commit 8c248ffb11
1 changed files with 9 additions and 1 deletions

View File

@ -117,8 +117,16 @@ const Vram = struct {
alloc: Allocator, alloc: Allocator,
fn init(alloc: Allocator) !Self { fn init(alloc: Allocator) !Self {
// In Modes 3 and 4, parts of the VRAM are copied to the
// frame buffer, therefore we want to zero-initialize Vram
//
// some programs like Armwrestler assume that VRAM is zeroed-out.
const black = std.mem.zeroes([0x18000]u8);
const buf = try alloc.alloc(u8, 0x18000);
std.mem.copy(u8, buf, &black);
return Self{ return Self{
.buf = try alloc.alloc(u8, 0x18000), .buf = buf,
.alloc = alloc, .alloc = alloc,
}; };
} }