4e5112b45b
move unreal mode hackery back to stage2.nasm
2025-09-05 20:32:19 -04:00
b0bd4b27b0
🎉 simple allocator init in the code
2025-09-05 16:48:24 -04:00
cd316afdd1
basic arena allocator implementation
2025-09-05 16:42:25 -04:00
9a478aa4d4
added another __REFLAT variant
2025-09-05 16:28:01 -04:00
31d05c35e5
move __TINY_DS_ES to unreal_mode function
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also some cleanup
2025-09-05 16:18:34 -04:00
b5ae11f850
set ds/es to a tiny memory model after entering Unreal mode
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ss/fs/gs will all be huge/flat model after
2025-09-05 15:43:22 -04:00
b9b3e92632
actually set cs to 16-bit segment for a bit in-case we want to run some pm code
2025-09-05 15:26:24 -04:00
01ec6da0cc
make unreal mode unreal again
2025-09-05 11:45:46 -04:00
c3871d2b7d
move string functions to video.nasm
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caught a bug where SetTextMode was setting mono text not 16-color mode
2025-09-05 10:33:03 -04:00
d824493ba2
small clarification on what "unreal" mode really is
2025-09-05 09:12:55 -04:00
b106eae066
fix alignment macros
2025-09-04 20:04:03 -04:00
28b23b9ce2
paragraph align the values in bss
2025-09-04 15:32:42 -04:00
402bf9974d
moved map file output to build
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moved output of builds to build/output
updated gitea action
2025-08-24 10:47:18 -04:00
8d5996566e
Update licensing and switch back to GPLv3 😅
2025-08-22 11:41:33 -04:00
b2c5a6bf46
macro defines this as BootTarget_cstr_cstr...fix this
2025-01-12 22:24:42 -05:00
531f4fa25f
Merge branch 'fat32_sys_rewrite' of github.com:Nivirx/stevia into fat32_sys_rewrite
2025-01-12 20:00:51 -05:00
d6e8a2a923
minor cleanup and add dev enviroment files to gitignore
2024-12-20 02:07:46 +00:00
9918f2367e
Merge upstream changes from branch 'trunk' into fat32_sys_rewrite
2024-12-19 20:09:48 -05:00
37eb87239c
moved varibles passed from vbr to .data section
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this is to work around having to save them without .bss ready
2024-12-19 15:18:28 -05:00
63a1a1beea
might have fixed some of the boot_drive issues with ext_read
2024-12-19 13:13:46 -05:00
3bdef99939
typo
2024-10-19 11:17:09 -04:00
d98786072c
use movzx instead of goofy mov word and and mask the upper bits
2024-10-18 07:58:40 -04:00
520f877b05
make space in bss directly for boot_drive and partition offsets
2024-10-17 20:33:44 -04:00
4708c78d54
correction
2024-10-17 14:33:32 -04:00
496a389ba4
remove newline and fix stack at end
2024-10-17 14:16:14 -04:00
2b3ab1dc3a
changed informational strings
2024-10-17 14:15:49 -04:00
c9f4b18d2b
some debuging text for fat32 stuff
2024-10-15 20:37:49 -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
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
c49de28a15
use bochs magic breakpoints in the error printer
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makes it easier to get a good state to do some investigating before reseting.
2024-10-13 20:53:13 -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
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
eb97aac673
relocate code sections to end up with stage2 starting at 0x500
2024-10-12 22:14:47 -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
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
96de8cd9c7
move far jump setup in EnterUnrealMode to right after we save CS
2024-10-11 21:51:07 -04:00
d73a4eea6c
move macro definition super early
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fix a few mistakes in macro defs
2024-10-11 19:31:31 -04:00
5703bad704
added macros to define cstr and str
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aligned all the entry points for proceedures to 4 bytes
added a PrintString wraper macro
2024-10-11 19:05:15 -04:00
df3b8dfc0c
fix passing stage2 wrong data for boot drive
2024-10-11 13:09:17 -04:00
ccb82f29fc
rename file to BOOT.BIN
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K.I.S.S.
2024-10-11 12:16:01 -04:00
13ff42a7d1
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
6643e3c990
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
ca195e6048
force the first jump to init in all stages to be the rel8 version
2024-10-07 20:39:39 -04:00
3c40190f23
surpress some of the relocation warnings for mbr, vbr & stage2
2024-10-06 18:50:32 -04:00
4c4c3b0e27
fixed read_disk_raw in ReadFATCluster
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boot_drive and partition_offset are global pointers now
removed an extra error from mbr disk read
and some general formating and cleanup 😅
2024-10-05 20:14:00 -04:00
