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BIOS: Add support for loading PS2 BIOSes

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This commit is contained in:
Albert Liu 2020-12-25 07:33:33 -08:00
parent 4db29f9399
commit 0e2276fc7a
4 changed files with 9 additions and 6 deletions
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6
src/core/bios.cpp
View file

@ -101,9 +101,11 @@ std::optional<Image> LoadImageFromFile(const char* filename)
const u32 size = static_cast<u32>(std::ftell(fp.get()));
std::fseek(fp.get(), 0, SEEK_SET);
if (size != BIOS_SIZE)
// Apparently some PS1/PS2 BIOS revisions found on the PS3 are neither 512KB nor 4MB, so just check within this range
if (size < BIOS_SIZE || size > BIOS_SIZE_PS2)
{
Log_ErrorPrintf("BIOS image '%s' mismatch, expecting %u bytes, got %u bytes", filename, BIOS_SIZE, size);
Log_ErrorPrintf("BIOS image '%s' mismatch, expecting between %u and %u bytes, got %u bytes", filename, BIOS_SIZE,
BIOS_SIZE_PS2, size);
return std::nullopt;
}

3
src/core/bios.h
View file

@ -9,7 +9,8 @@ namespace BIOS {
enum : u32
{
BIOS_BASE = 0x1FC00000,
BIOS_SIZE = 0x80000
BIOS_SIZE = 0x80000,
BIOS_SIZE_PS2 = 0x400000
};
using Image = std::vector<u8>;

4
src/core/host_interface.cpp
View file

@ -304,7 +304,7 @@ std::optional<std::vector<u8>> HostInterface::FindBIOSImageInDirectory(ConsoleRe
for (const FILESYSTEM_FIND_DATA& fd : results)
{
if (fd.Size != BIOS::BIOS_SIZE)
if (fd.Size < BIOS::BIOS_SIZE || fd.Size > BIOS::BIOS_SIZE_PS2)
{
Log_WarningPrintf("Skipping '%s': incorrect size", fd.FileName.c_str());
continue;
@ -353,7 +353,7 @@ HostInterface::FindBIOSImagesInDirectory(const char* directory)
for (FILESYSTEM_FIND_DATA& fd : files)
{
if (fd.Size != BIOS::BIOS_SIZE)
if (fd.Size < BIOS::BIOS_SIZE || fd.Size > BIOS::BIOS_SIZE_PS2)
continue;
std::string full_path(

2
src/core/host_interface.h
View file

@ -126,7 +126,7 @@ public:
std::optional<std::vector<u8>> GetBIOSImage(ConsoleRegion region);
/// Searches for a BIOS image for the specified region in the specified directory. If no match is found, the first
/// 512KB BIOS image will be used.
/// BIOS image within 512KB and 4MB will be used.
std::optional<std::vector<u8>> FindBIOSImageInDirectory(ConsoleRegion region, const char* directory);
/// Returns a list of filenames and descriptions for BIOS images in a directory.