Commit Graph

402 Commits

Author SHA1 Message Date
e30f99c1a7 debug.rom: Allocate lowmem segment instead of full relocate 2020-05-16 13:10:21 +00:00
e217b70bb7 Remove CP437 bitmap, i dont intend to use graphics mode for OS 2020-05-14 19:18:34 +00:00
df9f50c29a Remove leftover gitmodules 2020-05-14 19:17:34 +00:00
1647e70cae debug.rom: Implement cheapo versions of g and t commands 2020-05-13 21:30:43 +00:00
47037ad708 debug rom: implement cmd loop 2020-05-13 19:48:57 +00:00
064b6ff6af debug.rom: re-implement displaying flags and returning to code 2020-05-12 21:27:48 +00:00
c8adeb35d2 Drop debug.drv, rework debug rom instead 2020-05-12 20:47:34 +00:00
2569dde385 Add WIP for new debugger 2020-05-11 22:23:27 +00:00
5129a5499e Implement calculation of number of clusters 2020-05-11 21:19:51 +00:00
efb5ad146c Dummy for loading rdos drvs via option rom 2020-05-11 20:50:32 +00:00
1b42f1a480 Implement calculation for FAT position 2020-05-10 16:47:48 +00:00
2cb39a4ff1 Implement lba read 2020-05-08 20:48:23 +00:00
a472c396e7 Implement reading of BPB from FAT partition 2020-05-07 22:56:37 +00:00
8d28dc9f85 Implement reading of partition offset and size 2020-05-06 20:28:30 +00:00
9377924eab Implement reading geometry info from floppy BPB 2020-05-04 19:49:26 +00:00
Ain
6317d48396 Write down some roadmap 2020-05-03 19:05:00 +02:00
Ain
36f4673c91 Another attempt on disk i/o 2020-05-02 23:57:23 +02:00
Ain
404825387b mbr: make use of BPB includes 2020-04-30 20:22:14 +02:00
Ain
6d1befb49f kernel/diskio: EBIOS access is first class citizen in kernel 2020-04-28 22:09:56 +02:00
Ain
b73bfbe043 Split out kernel components in kernel/ 2020-04-27 15:56:41 +02:00
Ain
2d949a01f8 Implement whacky first version for 25h disk read 2020-04-26 23:14:34 +02:00
Ain
43e5cd6379 Direct console input: Dont return non-ascii keypresses 2020-04-25 21:54:15 +02:00
Ain
da41f6b0e2 Rework early startup and fix bss memory reservation 2020-04-23 21:49:10 +02:00
Ain
4804bf28ea Place variables into area after binary 2020-04-23 21:36:20 +02:00
Ain
3619a20703 Implement some console i/o 2020-04-23 21:35:28 +02:00
Ain
035b69db10 fat.bs: Implement correctly for FAT12 2020-04-22 21:45:40 +02:00
Ain
34ef468aa9 fat.bs: Smaller BPB size when not FAT32 2020-04-22 21:45:06 +02:00
Ain
63e85af62f Fix building of hdd image 2020-04-22 21:44:43 +02:00
Ain
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
Ain
bbfcd42f61 Set up interrupt table at startup directly (less code), not calling setint 2020-04-21 20:22:42 +02:00
Ain
94829aed1e qemu-hdd: Use hdd image with full partition table 2020-04-21 20:22:32 +02:00
Ain
22c1d45e59 Start document on EGA video 2020-04-20 21:41:42 +02:00
Ain
13e32675a1 Ship documentation on bios data area 2020-04-20 21:24:29 +02:00
Ain
f8788720f5 Implement int 28h: Idle callout 2020-04-20 19:21:02 +02:00
Ain
40065266f3 Implement int 29h: Fast console output 2020-04-20 19:20:43 +02:00
Ain
c5088789f9 Proof kernel against being invoked via 0x7C0:0 2020-04-19 15:14:10 +02:00
Ain
97f26c1f89 Remove stack switching, implement some syscalls 2020-04-19 00:35:31 +02:00
Ain
c1c012c5fc Make getint and setint reuse cs segment 2020-04-18 23:44:16 +02:00
Ain
4a92c4bc1e Drop MCBs as mean to manage memory 2020-04-18 22:59:46 +02:00
Ain
f7d3d5c62f Fix addressing mistake when splitting MCB 2020-04-17 23:59:57 +02:00
Ain
6d38a313c7 Implement MCB splitting 2020-04-17 23:33:42 +02:00
Ain
6c165f40c0 Create basic MCB at boot 2020-04-17 01:24:23 +02:00
Ain
70a675442a Reorder disk access and fix missing si setting 2020-04-16 23:04:06 +02:00
Ain
27e4dec580 Implement loading BPB from media 2020-04-15 23:51:07 +02:00
Ain
23ddd6b41a Implement some PoC of reading from disk 2020-04-15 00:17:58 +02:00
Ain
6b49a20865 Implement syscall subfunction jump table 2020-04-13 18:03:54 +02:00
39ef1f9a3e Implement some syscall handling 2020-04-13 13:53:21 +00:00
6ba3e0c071 Implement stack switching for dos syscall entry point 2020-04-10 15:00:26 +00:00
f46871502c Pave way for supporting FAT16 and FAT12 2020-04-06 19:20:15 +00:00
e34accfcff Improve support for auto-selecting LBA addressing 2020-04-04 21:05:44 +00:00