Nero
cc3fe6c4ee
kernel: fix banner printing
2020-08-27 21:01:41 +00:00
Nero
f0a000b7d1
kernel: implement diskio using drive table
2020-08-27 20:52:16 +00:00
Nero
fde87d651c
kernel: read A: geometry from BIOS
2020-08-15 21:15:31 +00:00
Nero
626b7e5624
Add struc for disk parameter table
2020-08-15 18:30:17 +00:00
Nero
5382edc2ae
Improve ordering of binary data in kernel
2020-07-04 10:35:38 +02:00
Nero
f9b180ea57
Implement file descriptor table and CON as file descriptor
2020-06-28 19:01:14 +02:00
Nero
1b42f1a480
Implement calculation for FAT position
2020-05-10 16:47:48 +00:00
Nero
36f4673c91
Another attempt on disk i/o
2020-05-02 23:57:23 +02:00
Nero
404825387b
mbr: make use of BPB includes
2020-04-30 20:22:14 +02:00
Nero
b73bfbe043
Split out kernel components in kernel/
2020-04-27 15:56:41 +02:00
Nero
2d949a01f8
Implement whacky first version for 25h disk read
2020-04-26 23:14:34 +02:00
Nero
43e5cd6379
Direct console input: Dont return non-ascii keypresses
2020-04-25 21:54:15 +02:00
Nero
da41f6b0e2
Rework early startup and fix bss memory reservation
2020-04-23 21:49:10 +02:00
Nero
4804bf28ea
Place variables into area after binary
2020-04-23 21:36:20 +02:00
Nero
3619a20703
Implement some console i/o
2020-04-23 21:35:28 +02:00
Nero
035b69db10
fat.bs: Implement correctly for FAT12
2020-04-22 21:45:40 +02:00
Nero
34ef468aa9
fat.bs: Smaller BPB size when not FAT32
2020-04-22 21:45:06 +02:00
Nero
abc7b563cd
Revamp MBR
...
New features:
- ES:DI (potential PnP structure) is preserved
- FAT detection now works by checking for BPB values
- Uses booterr procedure
2020-04-21 23:27:00 +02:00
Nero
bbfcd42f61
Set up interrupt table at startup directly (less code), not calling setint
2020-04-21 20:22:42 +02:00
Nero
f8788720f5
Implement int 28h: Idle callout
2020-04-20 19:21:02 +02:00
Nero
40065266f3
Implement int 29h: Fast console output
2020-04-20 19:20:43 +02:00
Nero
c5088789f9
Proof kernel against being invoked via 0x7C0:0
2020-04-19 15:14:10 +02:00
Nero
97f26c1f89
Remove stack switching, implement some syscalls
2020-04-19 00:35:31 +02:00
Nero
c1c012c5fc
Make getint and setint reuse cs segment
2020-04-18 23:44:16 +02:00
Nero
4a92c4bc1e
Drop MCBs as mean to manage memory
2020-04-18 22:59:46 +02:00
Nero
6c165f40c0
Create basic MCB at boot
2020-04-17 01:24:23 +02:00
Nero
70a675442a
Reorder disk access and fix missing si setting
2020-04-16 23:04:06 +02:00
Nero
27e4dec580
Implement loading BPB from media
2020-04-15 23:51:07 +02:00
Nero
23ddd6b41a
Implement some PoC of reading from disk
2020-04-15 00:17:58 +02:00
Nero
6b49a20865
Implement syscall subfunction jump table
2020-04-13 18:03:54 +02:00
Nero
39ef1f9a3e
Implement some syscall handling
2020-04-13 13:53:21 +00:00
Nero
6ba3e0c071
Implement stack switching for dos syscall entry point
2020-04-10 15:00:26 +00:00
Nero
f46871502c
Pave way for supporting FAT16 and FAT12
2020-04-06 19:20:15 +00:00
Nero
e34accfcff
Improve support for auto-selecting LBA addressing
2020-04-04 21:05:44 +00:00
Nero
3b438074ef
Reorder fat32 bootsector to reduce number of calls/rets
2020-04-04 16:03:02 +00:00
Nero
1e99086fc6
Add CHS+LBA dual support for boot sector
2020-04-04 14:29:33 +00:00
Nero
3da473a00c
Use optimized error handling for boot sector
2020-04-03 17:38:33 +00:00
Nero
cb48e628db
kernel stub: force large size to make sure cluster chaining works
2020-04-01 13:09:01 +00:00
Nero
1981a8efba
fat32 bs: use BPB include header and base off BP
...
We now set BP once at the start to point to the beginning of the BPB.
Encoding an direct address access can then be done relative to BP, which
saves an immediate byte per access.
2020-03-31 20:03:05 +00:00
Nero
9044e3948c
Remove BASE macro and companions
2020-03-31 19:46:59 +00:00
Nero
eabb1d9fa9
Properly set up registers when chainloading from boot sector
2020-03-30 20:41:32 +00:00
Nero
bc096f41d3
Compact bootloader code
2020-03-30 19:43:07 +00:00
Nero
0b2a7e7b64
fat32 bootloader: implement directory recursing and kernel load
...
this is actually working now.
2020-03-30 18:50:17 +00:00
Nero
bbe006c9bc
Improve FAT offset calculation
2020-03-30 15:23:51 +00:00
Nero
955acdacba
Split code up into directories for bs and com binaries
2020-03-30 12:14:47 +00:00
Nero
bc238a3bf9
i still dont know what im doing
2020-03-01 16:45:16 +00:00
Nero
4847eb4d88
Revert "Throw out previous x86 stuff"
...
This reverts commit 807db4a592
2020-03-01 12:03:35 +00:00
Nero
807db4a592
Throw out previous x86 stuff
2019-12-22 02:52:40 +01:00
Nero
eb67071ffb
Ubuntu needs stdint.h for uint8_t
2019-11-24 11:28:39 +00:00
Nero
af61db5e40
Improve memory position handling
2019-10-28 10:49:42 +00:00
Nero
47630b2c03
Implement boot based on reserved sectors
2019-10-28 10:38:18 +00:00
Nero
f81de2bfe8
Rename kernel to bdos
2019-10-27 18:59:42 +00:00
Nero
f6b8df0598
Remove misplaced data
2019-10-12 15:10:19 +00:00
Nero
d1dab01633
Rename rdos.sys to rdos.bin
...
*.sys is meant for DOS-like driver binaries. I actually have a flat
binary with a specific load offset.
2019-09-29 21:26:59 +00:00
Nero
56f9df5773
Throw DOS api away, re-layout memory to fit CP/M model
2019-09-29 08:52:00 +00:00
Nero
80a7b03ddc
Provide config file via CX (len) and BX (ptr) to kernel entry
2019-09-24 21:33:04 +00:00
Nero
a4e6a943b0
Make bootloader load both kernel and kernel config
2019-09-24 21:14:29 +00:00
Nero
cd7aafde09
Run kernel with from offset 0
...
I try to get the interrupt handlers into a offset as low as possible.
This is necessity if i want to relocate it later on its own.
For running from HMA, a minimal offset of 16 bytes would still be
necessary.
2019-09-23 22:06:29 +00:00
Nero
df4d3a90e3
Use SYS extension for kernel
2019-09-23 22:05:01 +00:00
Nero
0b7d141af7
Add warning about mformat overwriting bootsector code
2019-09-23 21:19:12 +00:00
Nero
705cd5c725
Remove command line parsing from bootloader
2019-09-23 20:25:39 +00:00
Nero
54149839a3
Rename fatvbr -> fat, generalize makefile
2019-09-21 18:05:41 +00:00
Nero
c70f388548
Get MBR ready, add hdimage target
2019-09-17 22:41:39 +00:00
Nero
7c4a618385
Add first attempt of a MBR
2019-09-17 21:53:10 +00:00
Nero
da03aa1481
Relocate boot sector to 0x600
2019-09-16 12:05:15 +00:00
Nero
fe42e9145a
fatvbr: correctly setup segment registers
2019-09-15 19:49:58 +00:00
Nero
bfb5b227b6
Fix cmdline setup in fatvbr
2019-09-15 17:51:44 +00:00
Nero
e143159a7a
Rename floppy bootsec into fatvbr, thats more accurate
2019-09-15 17:33:01 +00:00
Nero
567e09f7e9
Bootloader: parse cmdline field
2019-09-15 17:26:09 +00:00
Nero
4c9086e365
Rework bootloader to have adjustable memory layout
2019-09-14 13:18:23 +00:00
Nero
05c7e905d0
Fix copying of kernel arguments
2019-09-08 11:00:19 +00:00
Nero
b6972dcc69
Fix floppy VBR: wrong stack location
2019-09-08 10:03:00 +00:00
Nero
e7108f6622
Fix max argument length 126 -> 127
2019-09-08 01:05:32 +00:00
Nero
d853b87ec7
Use COM-based format, get bootloader working
2019-09-08 01:04:01 +00:00
Nero
6b424844e9
Optimize fix_chs code
2019-06-24 17:05:57 +00:00
Nero
78d5b6aa28
Add prototype for serial bootloader
2019-06-24 16:47:31 +00:00
Nero
1259fe14fe
Rework VBR
2019-05-19 20:07:08 +00:00
Nero
c288bbffb9
Fix alignment fuckup in VBR
2019-05-07 17:50:07 +00:00
Nero
9b1c54f5d3
Disable interrupts during boot
2019-05-02 20:51:20 +00:00
Nero
d8fe1b211c
Change kernel blob format to be option rom compatible
2019-04-20 21:02:35 +00:00
Nero
8cdc21b596
Relocate kernel to 0x01000 per convention
2019-04-16 07:22:53 +00:00
Nero
9a6ecabfd7
vbr: now able to load first cluster
2019-03-31 20:53:14 +00:00
Nero
dad80532ab
Allow arbitrary floppy sizes
2019-03-31 13:22:24 +00:00
Nero
208b2f95b5
vbr: Reorder code, improve error behavior
2019-03-31 13:08:39 +00:00
Nero
6e209d9e55
vbr: reduce size for error reporting
2019-03-31 12:44:50 +00:00
Nero
9aa032a90c
Rename vbr to fat12vbr
2019-03-30 12:39:53 +00:00
Nero
97fe07a210
vbr: implement file searching in rootdir
2019-03-29 23:48:18 +00:00
Nero
cb3c977286
vbr: bail out on disk read error
2019-03-29 22:32:50 +00:00
Nero
f70242dfa2
vbr: display drive geometry
2019-03-29 21:40:44 +00:00
Nero
6bfb0dd21e
vbr: read root directory into memory
2019-03-27 23:06:13 +00:00
Nero
7492e99c3f
vbr: relocate to 0x00500
2019-03-27 23:05:46 +00:00
Nero
c88395c12d
vbr: work in progress on block reading
2019-03-27 22:05:00 +00:00
Nero
391a1aa7d5
vbr: CHS reading seems to work so far
2019-03-26 20:46:40 +00:00
Nero
96234c2a40
vbr: Parse CHS from BIOS to optionally overwrite hardcoded CHS data
2019-03-25 22:00:07 +00:00
Nero
2229c319b6
Add first steps for VBR bootloader
2019-03-25 08:51:37 +00:00
Nero