![]() I found these files for the MBR code:īoot0af - looks for the active partition PBRīoot0ss - 'scan-signature' for AF type - MAC OS extended - seems to work best - no Active ptn needed.īoot0md - multiple drives - searches various drives for an HFS+/MAC OS extended partition - it seems to need the partition to be flagged as Active though! The MBR code seems to look for and boot a Clover PBR. You need to replace the boot code in your USB drive's MBR with the boot code from one of these files (but not the partition table). The MBR code can be found in a selection of boot0xxx files. This is a normal MBR with a partition table, but the code in it seems to be 'special' (see PBR below for why I think this). To cut a long story short (essential data about Clover is hard to find!), here is how the Clover boot-chain works.įirst in the boot chain, we have the MBR. I later found that by pressing the 7 key after the first 2 seconds when booting from VBox, I managed to get the correct GUI menu! However, if I ran the USB drive on a real system, I got the correct GUI menu. Under VBox, I only got the 'text-mode' screen after making a USB Flash drive using BootDiskUtility.exe to make the USB drive. If you see a Clover menu option to EFI-boot from a drive - it means MBR\CSM-boot! Having done this, I found it would not boot under RMPrepUSB's QEMU (which doesn't support 64-bitness and just rebooted) or VirtualBox (text mode menu only) but did boot on a real system to the full GUI menu (see piccy below) - but only on a USB 2.0 port, Clover does not load on my Z87's USB 3.0 ports.Īnother important (and confusing!) point to note is that 'EFI booting' means MBR booting in 'Clover-speak' and UEFI booting means UEFI booting. ![]() This is a Windows tool that makes a Clover-bootable USB drive for you. imgPTN image files).įirst, I made a FAT32 USB Flash drive using BootDiskUtility.exe. I would like to add this to the CSM menu of Easy2Boot so that users would not have to reboot the system and choose the UEFI: xxxxxx boot option to boot from the E2B drive (when using. It allows you to boot in MBR\CSM mode and then run Clover which acts as a 'pseudo-UEFI boot manager', allowing you to boot to a UEFI OS from an MBR\CSM boot. Both are 'firmware in RAM' replacements for UEFI firmware.
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