From: nowhere@never.at
On 23/03/2023 15:45, muta...@gmail.com wrote:
>> So what is the UEFI equivalent to INT13 and how can I make it boot my
>> old stuff from either CD or USB ?
> As mentioned, if all you need is a bit of code loaded,
> you don't need to anything at all except plonk a
> bootx64.efi into \efi\boot of a FAT-formatted disk.
here I have my first problem:
with a new assembled PC I get a main-board with a CD that contains only
a few drivers for windoze loonix and Mac, nothing boot able on it.
the HDs are all empty, not formatted in any usable mode.
So it would need me to buy a win11-DVD which I wont ever do.
any suggestion ? I'd need a boot able formatting tool first.
Next demand would be a tool which can create folders.
And then such a tool must be able to copy my OS-boot-image
into a bootx64.efi perhaps at a certain offset dunno yet how
.efi files were organized (I may find some info on the net)
but the hex-dumps below show that you created M$ PE-files.
one more problem: my OS-images incl. boot-part are just a bunch of
consecutive sectors (can be seen and stored as .bin files)
no header, no redirection, very own checksum algo.
> Here is some assembler code:
thanks for trying
> C:\devel\pdos\pdpclib\xxx3>type efi64.asm
> # Written by Paul Edwards
> # Released to the public domain
> .code64
> .intel_syntax noprefix
> .globl efimain
> efimain:
> # ret is 1 byte, jmp is 2 bytes
> # So for testing, comment out the jmp and add 2 rets
dup 64 ret ;wouldn't one be enough?
;where would this return go to ?
so I assume the first 64 bytes are special purpose ?
[...]there is no assembler :) and rare ever will be.
OK I'll keep the trail for reference (2K PE format).
__
wolfgang
> Here are two executables:
>
> C:\vbox\x64test\efi\boot>dir
> Volume in drive C has no label.
> Volume Serial Number is 4E58-AF11
>
> Directory of C:\vbox\x64test\efi\boot
>
> 2023-03-23 22:17 .
> 2023-03-23 22:17 ..
> 2023-03-23 22:17 2,048 bootx64.efi
> 2023-03-23 22:15 2,048 loop.efi
>
> C:\vbox\x64test\efi\boot>hexdump loop.efi
> 000000 4D5A9000 03000000 04000000 FFFF0000 MZ..............
> 000010 B8000000 00000000 40000000 00000000 ........@.......
> 000020 00000000 00000000 00000000 00000000 ................
> 000030 00000000 00000000 00000000 80000000 ................
> 000040 0E1FBA0E 00B409CD 21B8014C CD215468 ........!..L.!Th
> 000050 69732070 726F6772 616D2063 616E6E6F is program canno
> 000060 74206265 2072756E 20696E20 444F5320 t be run in DOS
> 000070 6D6F6465 2E0D0D0A 24000000 00000000 mode....$.......
> 000080 50450000 64860200 F25E1C64 00000000 PE..d....^.d....
> 000090 00000000 F0002E02 0B020224 00020000 ...........$....
> 0000A0 00020000 00000000 00100000 00100000 ................
> 0000B0 00000040 01000000 00100000 00020000 ...@............
> 0000C0 04000000 00000000 05000200 00000000 ................
> 0000D0 00300000 00040000 79FD0000 0A006001 .0......y.....`.
> 0000E0 00002000 00000000 00100000 00000000 .. .............
> 0000F0 00001000 00000000 00100000 00000000 ................
> 000100 00000000 10000000 00000000 00000000 ................
> 000110 00200000 14000000 00000000 00000000 . ..............
> 000120 00000000 00000000 00000000 00000000 ................
> 000130 00000000 00000000 00000000 00000000 ................
> 000140 00000000 00000000 00000000 00000000 ................
> 000150 00000000 00000000 00000000 00000000 ................
> 000160 00000000 00000000 00000000 00000000 ................
> 000170 00000000 00000000 00000000 00000000 ................
> 000180 00000000 00000000 2E746578 74000000 .........text...
> 000190 60000000 00100000 00020000 00040000 `...............
> 0001A0 00000000 00000000 00000000 20005060 ............ .P`
> 0001B0 2E696461 74610000 14000000 00200000 .idata....... ..
> 0001C0 00020000 00060000 00000000 00000000 ................
> 0001D0 00000000 400030C0 00000000 00000000 ....@.0.........
> 0001E0 00000000 00000000 00000000 00000000 ................
> 0001F0 00000000 00000000 00000000 00000000 ................
> 000200 00000000 00000000 00000000 00000000 ................
> 000210 00000000 00000000 00000000 00000000 ................
> 000220 00000000 00000000 00000000 00000000 ................
> 000230 00000000 00000000 00000000 00000000 ................
> 000240 00000000 00000000 00000000 00000000 ................
> 000250 00000000 00000000 00000000 00000000 ................
> 000260 00000000 00000000 00000000 00000000 ................
> 000270 00000000 00000000 00000000 00000000 ................
> 000280 00000000 00000000 00000000 00000000 ................
> 000290 00000000 00000000 00000000 00000000 ................
> 0002A0 00000000 00000000 00000000 00000000 ................
> 0002B0 00000000 00000000 00000000 00000000 ................
> 0002C0 00000000 00000000 00000000 00000000 ................
> 0002D0 00000000 00000000 00000000 00000000 ................
> 0002E0 00000000 00000000 00000000 00000000 ................
> 0002F0 00000000 00000000 00000000 00000000 ................
> 000300 00000000 00000000 00000000 00000000 ................
> 000310 00000000 00000000 00000000 00000000 ................
> 000320 00000000 00000000 00000000 00000000 ................
> 000330 00000000 00000000 00000000 00000000 ................
> 000340 00000000 00000000 00000000 00000000 ................
> 000350 00000000 00000000 00000000 00000000 ................
> 000360 00000000 00000000 00000000 00000000 ................
> 000370 00000000 00000000 00000000 00000000 ................
> 000380 00000000 00000000 00000000 00000000 ................
> 000390 00000000 00000000 00000000 00000000 ................
> 0003A0 00000000 00000000 00000000 00000000 ................
> 0003B0 00000000 00000000 00000000 00000000 ................
> 0003C0 00000000 00000000 00000000 00000000 ................
> 0003D0 00000000 00000000 00000000 00000000 ................
> 0003E0 00000000 00000000 00000000 00000000 ................
> 0003F0 00000000 00000000 00000000 00000000 ................
> 000400 EBFEC3C3 C3C3C3C3 C3C3C3C3 C3C3C3C3 ................
> 000410 C3C3C3C3 C3C3C3C3 C3C3C3C3 C3C3C3C3 ................
> 000420 C3C3C3C3 C3C3C3C3 C3C3C3C3 C3C3C3C3 ................
> 000430 C3C3C3C3 C3C3C3C3 C3C3C3C3 C3C39090 ................
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* Origin: you cannot sedate... all the things you hate (1:229/2)
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