29db27925f
initial work on a macro to call read_disk_raw
2024-10-13 16:37:52 -04:00
7f06d47f32
add reserved space for jmp short init at the start, technically this is part of the bpb anyways
2024-10-13 16:37:29 -04:00
4faffbf7fe
remove defs for memory locations (moving to bss)
2024-10-13 16:36:55 -04:00
832141efb4
bss convertion for mbr stage
2024-10-13 16:36:11 -04:00
c919144496
turns out huge unreal mode isn't supported in bochs
...
huge unreal mode is 4GiB code in 16bit mode + 4GiB data
we will just use the regular big flat model instead (64KiB code/4GiB data)
2024-10-13 14:50:49 -04:00
a62f3de26f
unreal gdt tweaks & fixes
2024-10-13 13:22:01 -04:00
0983ec3fd5
remove map files as well
2024-10-12 22:16:17 -04:00
bd40d6d324
relocate code sections to end up with stage2 starting at 0x500
2024-10-12 22:14:47 -04:00
3d3bcc6ea5
reduced stage2 to 24KiB
2024-10-12 22:13:12 -04:00
d1f8ec4a9e
follow standard proceedure and reallocate the mbr to 0x600
2024-10-12 21:21:43 -04:00
2fa03c31d7
partially roll back changing the segment to 0x07E0
2024-10-12 20:25:04 -04:00
f535840572
big step...and also its completely broken right now
...
we are going to use 0x07E0 as our base segment so we have a bit
more memory to work with until we are fully in 32bit protected mode.
this commit is broken but is just one step towards a working release.
2024-10-12 15:41:39 -04:00
54b7a81648
correct typo
2024-10-12 15:39:16 -04:00
1d84f52690
definition corrections in part table stuff
2024-10-12 15:39:04 -04:00
276fe70572
use early_mem.inc
2024-10-12 15:38:47 -04:00
73b42c66fd
renamed mem.inc and removed unused items
2024-10-12 15:38:24 -04:00
9656a9465b
first version of kmemcpy5/kmemset4
2024-10-12 14:48:26 -04:00
bd80f48b1b
use NASM defined size value from structure macro
2024-10-12 12:58:32 -04:00
3fbfcbef53
BIOSMemoryMap is a location in bss now, use lea
2024-10-12 12:58:16 -04:00
31c45051e6
minor cleanup related to memory refactor
2024-10-12 12:57:56 -04:00
a523e17d27
moved stuff that is only referenced in Stage2 to stage2 bss
2024-10-12 12:55:29 -04:00
65e5a83eb4
stage2 is now a multisection binary file
...
also preparing to move memory globals to bss section.
2024-10-12 11:29:20 -04:00
cd048933ec
output symbol maps to ease debuging
2024-10-12 11:28:25 -04:00
e648fd0de6
remove PRINT_FUNC macro...this isn't it chief
2024-10-12 11:27:55 -04:00
2581e50c8b
ignore nasm symbol map files
2024-10-12 11:27:20 -04:00
60aaf5cdd9
move far jump setup in EnterUnrealMode to right after we save CS
2024-10-11 21:51:07 -04:00
59678149e0
added debug config for bochs
2024-10-11 21:49:15 -04:00
075e51c8bc
move macro definition super early
...
fix a few mistakes in macro defs
2024-10-11 19:31:31 -04:00
48cd0f742d
added macros to define cstr and str
...
aligned all the entry points for proceedures to 4 bytes
added a PrintString wraper macro
2024-10-11 19:05:15 -04:00
e5fb1b41eb
added bochs debug wrappers
2024-10-11 19:03:27 -04:00
208729ed01
split e820 bios call documentation to its own file under docs/
2024-10-11 17:20:53 -04:00
086cf9d8ea
correct src size in op
2024-10-11 16:52:57 -04:00
095822fa27
inlined ClusterToLBA
...
removed caller save kludge for now
init first_root_dir_sector from ebpb data
2024-10-11 15:55:24 -04:00
71f13fd6b5
somewhat of a cludge, but added a macro to save all caller saved regs
2024-10-11 14:25:01 -04:00
802d47fbf7
fix passing stage2 wrong data for boot drive
2024-10-11 13:09:17 -04:00
4af0637c7f
use kmemset to 0 out fat32_state in InitFATDriver
2024-10-11 13:00:45 -04:00
07197b0d5b
reduce proceedure local storage to 16 bytes
2024-10-11 12:59:36 -04:00
056551fdd1
rename file to BOOT.BIN
...
K.I.S.S.
2024-10-11 12:16:01 -04:00
0aae0616fd
more comments to seperate setups
2024-10-11 12:08:09 -04:00
aff631f3db
force 1-1 logical to physical sectors
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copy our VBR code to backup VBR
2024-10-11 12:04:44 -04:00
a3a768adf4
more error handling in detecting disk image creation
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will need ported to macOS sometime
2024-10-11 11:44:04 -04:00
d684d4f11f
more error handling for dd writes
2024-10-11 11:31:38 -04:00
75c046f9cd
use gs for vesa framebuffer (was fs)
2024-10-08 20:23:16 -04:00
00daf92df5
unreal gdt now has 2 selectors 1 code, 1 data
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ss, and e/f/g segments are loaded to the same flat 4gb segment
moved gdt notes to documentation
2024-10-08 20:22:21 -04:00
5ab7e70455
Update README.md
2024-10-08 09:08:47 -04:00
6ae68d1a19
ensure 2 byte jmp rel8 thunk to init
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surpress reloc abs warnings
corrected include paths/filenames
2024-10-08 08:55:17 -04:00
586f3f0106
converted error handler to a 16bit far jump
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optimized the early error printer a bit to save some bytes
removed DEBUG_HCF macro
2024-10-08 08:53:30 -04:00
8301fc20a8
renamed files to show code vs defs
...
files that actually include code should be in .nasm files
defines/macros/non-code should be in .inc files
2024-10-07 20:41:15 -04:00
4218a08658
force the first jump to init in all stages to be the rel8 version
2024-10-07 20:39:39 -04:00
2bbdaddb68
jmp imm32 vs jmp rel8 (5 bytes vs 2 bytes)
2024-10-06 21:46:32 -04:00
