c5afc6ec61
Add printf facility for kernel to allow debug messages on phys. system
2020-12-26 16:03:15 +00:00
424e174523
drive i/o: improvements regarding reset and stack usage
...
- read and write now run in the same function, less branching
- implemented on-demand controller reset
- set up a function stub for int 0x13 for later stack switching
2020-12-26 14:40:43 +00:00
0a2a0e4659
Support managing floppy parameter table
2020-12-22 21:14:16 +00:00
f10fa026cf
Add support for floppy types with other geometry than 18/2/80
2020-12-18 18:29:26 +00:00
de04b5ca01
Make logging in drive a no-op if drive already logged in
2020-12-17 00:41:53 +00:00
bd3b27362d
skip reads when sector number already matches
2020-12-17 00:10:02 +00:00
e096745c13
Implement map-like sector access for floppy drives
2020-12-15 23:29:35 +00:00
8c3d61e68d
Remove reserved sectors from generated disk, not needed anymore
2020-12-15 20:38:48 +00:00
c0bd238d54
New bootsect program to dump bios data area, aid for debugging hw
2020-12-15 20:16:42 +00:00
6bdb1da2ed
Read disk geometry and DPT from BIOS
2020-10-30 09:29:22 +00:00
c06c6ac918
fat vbr: fix incorrect addition of partition offset
2020-10-25 14:22:53 +00:00
50aa6e4eec
Use uppercase non-struct constants for BPB
2020-10-25 09:15:33 +00:00
dc6035fe9d
Protypical implementation of DPT copying
2020-10-24 22:50:23 +00:00
33f4fe37a8
Makefile: Fix KVM detection to not trigger on weird ass make versions
2020-10-20 21:03:47 +00:00
ca3eebd692
Remove fields from BPB that are EBPB actually
...
This is just a trick so i can use bpb_size in the kernel later,
omitting things that are not relevant to interfacing the FS.
2020-10-15 20:20:17 +00:00
7b18c6d236
fix bpb struc: forgot single byte for flags
2020-10-14 20:16:43 +00:00
c41782c78f
Build drive selection logic for FCBs
2020-10-13 20:10:23 +00:00
4e779c5a22
Lay out skeletons for FCB handling
2020-10-11 21:33:01 +00:00
31c6ef5876
boot/kernel: print banner
2020-09-27 15:45:19 +00:00
729e6790ef
boot/fat: Save a byte restoring DL
2020-09-27 15:10:28 +00:00
909349a4cf
boot/fat: Shave off a byte by storing final address on stack
2020-09-27 11:25:57 +00:00
386e91b4c8
boot/fat: Fix incorrect initialisation of dx
2020-09-27 10:48:05 +00:00
2dc6970721
boot/fat: Use segmentation to allow up to 64Kb fat/kernel size
2020-09-27 10:40:42 +00:00
adf67d9723
Rework fat boot sector, load FAT only once instead of partial
2020-09-23 23:01:50 +00:00
31eac279c2
Revert to more sensible kernel.bs boot scheme
...
I think i should consider it a necessity that the kernel is accessible
as a regular file. This makes installing rdos on another blockdev
much easier.
2020-09-20 19:58:19 +02:00
8ed9fe7465
Fix hdd booting using bpb struc
2020-09-19 08:22:50 +00:00
1d64c2364d
Improve build transparency (documentation and inline version number)
2020-09-17 08:59:22 +00:00
e1bfaa5d88
automatically use kvm if available
2020-09-17 06:47:32 +00:00
8e87cf0f75
Load kernel from reserved sectors in fatfs
2020-09-17 05:57:46 +00:00
1ee0637eab
Update goals
2020-09-15 22:02:38 +02:00
9cd4c04c42
Make kernel and fat.bs use BPB struct
2020-09-15 21:45:29 +02:00
303b1756e0
Fuck up the kernel, i have other ideas now
2020-09-15 21:44:32 +02:00
4b5993cfa9
WIP of asm86
2020-09-15 21:44:13 +02:00
79c902c197
kernel: Fix borked ax assignment
2020-08-31 20:21:10 +00:00
352540bd25
kernel: First steps of calculating drive tab data from BPB
2020-08-31 20:11:05 +00:00
cc3fe6c4ee
kernel: fix banner printing
2020-08-27 21:01:41 +00:00
f0a000b7d1
kernel: implement diskio using drive table
2020-08-27 20:52:16 +00:00
4a294ee21c
kernel: fix advancing of drive table pointer during drive init
2020-08-22 23:38:11 +00:00
3b39572043
kernel: fall back to defaults if int 13h/ah=8 spews bogus data
2020-08-22 23:36:25 +00:00
ff3a59c71e
kernel: properly loop over floppies
2020-08-22 23:36:09 +00:00
c3f22e5aea
remove docs
2020-08-15 21:16:50 +00:00
fde87d651c
kernel: read A: geometry from BIOS
2020-08-15 21:15:31 +00:00
734ab3852a
Remove skeleton of rom-based kernel
2020-08-15 21:02:30 +00:00
c604fd43e7
Remove attempt of rom-based debugger
2020-08-15 20:59:40 +00:00
d6b5792ff7
Make dprintf the default debugging facility
2020-08-15 20:58:40 +00:00
626b7e5624
Add struc for disk parameter table
2020-08-15 18:30:17 +00:00
a90ca60422
Add first steps of another assembler attempt
2020-07-19 12:07:03 +02:00
5382edc2ae
Improve ordering of binary data in kernel
2020-07-04 10:35:38 +02:00
f9b180ea57
Implement file descriptor table and CON as file descriptor
2020-06-28 19:01:14 +02:00
65564b78af
Start working on rom-based kernel
2020-05-29 00:32:30 +02:00
