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4 commits

Author SHA1 Message Date
Pete Batard
8fb602b8ee
[mbr] use 80x25:16 text mode rather than 640x480:16 VGA mode
* This should produce the same output while improving compatibility with systems that have a broken VGA implementation.
* Also fix an LD error with newer gcc toolchains.
2022-07-04 15:08:55 +01:00
Pete Batard
2dd538b7cb
[core] fix MBR protective message overwriting the primary GPT
* We distractedly chose to populate the message from our protective MBR
  for GPT/UEFI-only boot media into the 4KB that directly followed the
  MBR, which of course is space that is being used by the primary GPT.
* This resulted on systems having to fall back to using the secondary
  GPT, which not all appear to be designed to do.
* Alter the code to ensure the protective message is written at LBA 34,
  after the primary GPT.
* Closes #1507
2020-04-13 17:05:33 +01:00
Pete Batard
bfbb9d2ed5
[mbr] replace gpt.S with a more generic msg.S
* msg.S now reads an ASCII message (with escaped colour sequences)
  from the following blocks, which is both more flexible and allows
  for more content to be displayed.
* Also adds Bochs testing to the MBR build facility
2020-02-19 14:23:42 +00:00
Pete Batard
0f57ed1684 [mbr] "Press any key to boot from USB..."
* Adds an MBR to prompt the use about USB or HDD boot
* If USB boot is not selected, an INT13h override is added to
  make the second bootable drive think it is first (0x81 -> 0x80)
* USB drive BIOS index is left unmodified
2012-03-20 02:56:34 +00:00