e33f010f73
added carry and divz checks across the fat32 code
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also use the pointers we have in bss to our saved data
2024-10-16 11:58:57 -04:00
c9f4b18d2b
some debuging text for fat32 stuff
2024-10-15 20:37:49 -04:00
e680620148
remove some redundant reloads of si
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use xchg to swap si/di instead of the stack
uninline ClusterToLBA call
2024-10-15 20:01:24 -04:00
fb54c65caf
remove jmp short init at the start of stage2
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also correct total size output as combined .data + .text
2024-10-15 18:33:57 -04:00
7f6436297e
align to 16 byte bounds and add git info to build
2024-10-15 18:28:06 -04:00
5159ef8a7c
correct size of operand in PrintDWORD
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added some magic debug points for stuff that isn't working as well.
2024-10-15 13:32:36 -04:00
56e8081118
magic debug before touching anything in error printer
2024-10-15 13:31:51 -04:00
50b08f6b72
turn off magic debug in mbr/vbr stages
2024-10-15 13:31:32 -04:00
a97e3bea9b
removed bpb_offset_bx dep
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reworked init: process
512 byte stack...should be more than enough for the vbr
2024-10-15 12:57:54 -04:00
aa8c7b67ab
moved stack to end of bss & reduced size for now.
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removed redzone label
reordered sp/bp setup and bss zeroing in init:
fixed kmemcpy call stack usage
2024-10-15 12:56:12 -04:00
b4621a7fb8
reduced stack size in mbr stage
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removed some unused data in bss
reordered how/when in init we set sp/bp and zero bss
we now push the top of the stack pointer/bp at the top of the stack, which makes the stack frame more 'normal'
also use movsb instead of movsw
2024-10-15 12:53:22 -04:00
5f9567d44e
include disk signature and reserved bytes in part table struct
2024-10-15 12:51:34 -04:00
2020408e8d
ha ha ha, again!
2024-10-15 12:51:02 -04:00
405a5ff20e
I guess wx work again on Debian Trixie?
2024-10-15 12:50:51 -04:00
4660882edb
change entry points (again)
2024-10-14 17:58:43 -04:00
f683b8fd17
16 KiB stage2
2024-10-14 17:58:30 -04:00
56c18d8457
correct drive_num argument on read_disk_raw
2024-10-14 13:18:41 -04:00
cfda93048b
replace text documentation with markdown
2024-10-14 10:44:44 -04:00
c49de28a15
use bochs magic breakpoints in the error printer
...
makes it easier to get a good state to do some investigating before reseting.
2024-10-13 20:53:13 -04:00
4a013b4a59
enable magic in the normal bochsrc.txt
2024-10-13 20:51:34 -04:00
cd833184da
use bx addressing in read_disk_raw
2024-10-13 20:51:16 -04:00
7617b11199
Merge pull request #3 from Nivirx/bss-setup
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convert MBR, VBR, & Stage2 to use a BSS section.
2024-10-13 18:05:19 -04:00
86564b2356
added partition_table and fat32_bpb params to stage2
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also the partition table and fat32_bpb and passed/copied from the mbr/vbr now
2024-10-13 17:54:06 -04:00
5ba7801926
bss for vbr stage
2024-10-13 17:52:28 -04:00
35e9aec059
fixed bss init in mbr
2024-10-13 17:52:09 -04:00
736aad85e5
pass location of partition_table structure to vbr
2024-10-13 16:41:39 -04:00
f51d8b4142
initial work on a macro to call read_disk_raw
2024-10-13 16:37:52 -04:00
3693eca940
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
a383f7cfb4
remove defs for memory locations (moving to bss)
2024-10-13 16:36:55 -04:00
c1a9d449df
bss convertion for mbr stage
2024-10-13 16:36:11 -04:00
ce6240249a
turns out huge unreal mode isn't supported in bochs
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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
963dec5281
unreal gdt tweaks & fixes
2024-10-13 13:22:01 -04:00
3d1877d7fe
remove map files as well
2024-10-12 22:16:17 -04:00
eb97aac673
relocate code sections to end up with stage2 starting at 0x500
2024-10-12 22:14:47 -04:00
c60bad1066
reduced stage2 to 24KiB
2024-10-12 22:13:12 -04:00
050f90517a
follow standard proceedure and reallocate the mbr to 0x600
2024-10-12 21:21:43 -04:00
555cf1271b
partially roll back changing the segment to 0x07E0
2024-10-12 20:25:04 -04:00
8fea1f0a06
big step...and also its completely broken right now
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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
b49b2bae68
correct typo
2024-10-12 15:39:16 -04:00
5abbfa4d15
definition corrections in part table stuff
2024-10-12 15:39:04 -04:00
83aa7d1147
use early_mem.inc
2024-10-12 15:38:47 -04:00
ac6ad77249
renamed mem.inc and removed unused items
2024-10-12 15:38:24 -04:00
bc89850c00
first version of kmemcpy5/kmemset4
2024-10-12 14:48:26 -04:00
12fc8a1e37
use NASM defined size value from structure macro
2024-10-12 12:58:32 -04:00
baa146bef5
BIOSMemoryMap is a location in bss now, use lea
2024-10-12 12:58:16 -04:00
d1217182d4
minor cleanup related to memory refactor
2024-10-12 12:57:56 -04:00
5a74cd86ad
moved stuff that is only referenced in Stage2 to stage2 bss
2024-10-12 12:55:29 -04:00
69c068f6be
stage2 is now a multisection binary file
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also preparing to move memory globals to bss section.
2024-10-12 11:29:20 -04:00
63421661a7
output symbol maps to ease debuging
2024-10-12 11:28:25 -04:00
9cde0333e6
remove PRINT_FUNC macro...this isn't it chief
2024-10-12 11:27:55 -04:00
