24f04792f6
Makefile: allow COM program testing via dosbox
2021-04-20 16:27:32 +00:00
d9affa3cae
Kernel: Fix segmenting bugs
2021-04-20 16:27:10 +00:00
39a1ed085c
Implement reading/writing a DTA full from a cluster without ptr advance
2021-04-05 23:05:08 +00:00
85d0949ec7
uartctrl: Implement CP437 to DEC VT character conversion
2021-04-05 18:59:44 +00:00
963aebd948
Add uartctrl.rom: Control PC via COM1 attached terminal
2021-04-04 21:41:22 +00:00
b617709684
Fix rootdir.asm re-using potentially wrong DS
2021-03-19 19:26:38 +00:00
5e3ae0aa08
Put rootdir and cluster access into separate files
2021-03-19 19:01:38 +00:00
fbab632616
Implement file open
2021-03-19 18:50:50 +00:00
f702006582
implement fcb search with more efficient segmenting and dta use
2021-02-25 00:45:56 +00:00
7c4b84ecb3
word-align disk buffer
2021-02-19 19:41:34 +00:00
ec205407a7
fix conout using stray DS
2021-02-19 19:41:24 +00:00
a91fb3de0d
Implement common char i/o functions
2021-02-19 08:57:21 +00:00
d7c1781d2f
mbr: set up first 7 bytes of kernel PSP
2021-02-18 20:20:40 +00:00
78233db88d
fix nasm orphaned labels warnings
2021-02-18 20:20:14 +00:00
0b7e4cb3a4
Make boot file name configurable
2021-02-18 19:38:56 +00:00
d142fb4f39
Omit printing dots from MBR
2021-02-18 19:38:42 +00:00
8131db9b29
Re-add support for booting from qemu harddisk
2021-02-18 19:04:36 +00:00
84b754551c
Restructure kernel to use 1-segment COM convention
2021-02-07 16:17:31 +00:00
71c89387fc
New bootloader concept: sys-like util to generate a boot sector
...
Right now only floppies are supported
2021-02-03 00:27:44 +00:00
19f598251d
Work monitor program up to usable state
2021-01-28 23:32:31 +00:00
daeb3891dd
Add monitor program for debugging disk i/o
2021-01-28 21:16:52 +00:00
ff179a5e98
Remove rom and pxe boot related stuff
...
I dont intend to ever implement that
2021-01-23 17:44:18 +00:00
ebd356ed8e
Implement file search in directory
2021-01-23 17:32:53 +00:00
4530866130
fix psp/setdta corrupting DS
2021-01-21 22:30:35 +00:00
1ec84fc411
Single out PSP management
2021-01-21 22:28:57 +00:00
f8799e3692
add ihex bootsector
2021-01-15 19:49:08 +00:00
3056d659fa
fix syscall gateway not preserving DS on entry
2021-01-13 18:36:12 +00:00
440187c2a8
Harden drive.asm against unexpected DS and ES values
2021-01-13 18:32:17 +00:00
df243e668e
Remove PIC functionality from syscall.asm
...
Makes things easier
2021-01-13 17:38:22 +00:00
23c6223055
Relocate kernel to 0x0700 and use sections proper
2021-01-13 17:21:10 +00:00
4046dd7d6c
Improve syscall entrypoint
2021-01-13 17:20:49 +00:00
750bfbdc60
Remove outdated comments
2021-01-05 00:15:36 +00:00
34023678a4
Implement current drive for user programs
2021-01-04 23:29:50 +00:00
7e2e91b2b7
Reorder code and remove unused farptr components
2021-01-04 23:19:14 +00:00
0256d6ab36
Improve syscall gateway: now position-independent
...
Also it now keeps all register values except SS:SP on entry.
2021-01-04 23:01:14 +00:00
fb4bbfc8cf
Continued development on int 21h interface
2021-01-03 18:11:41 +00:00
3f8cfaac42
Remove debugging output
2021-01-03 18:10:54 +00:00
1dbfb2f592
Implement entrypoint and table for syscalls
2021-01-02 03:45:03 +00:00
015eea2f2f
Rename fndfst to open
2021-01-02 02:48:04 +00:00
9a1c4139a6
Implement searching directory for exact matches
2021-01-02 02:07:40 +00:00
7754312609
remove unused kernel/main
2020-12-27 00:25:30 +00:00
2bb40e315c
Fix ebios dap packet: wrong size
2020-12-26 20:58:51 +00:00
af5df85c16
Use ebios extensions if enabled
2020-12-26 20:54:39 +00:00
2d97bb57e5
Fix mbr: DAP size was incorrectly set to zero
2020-12-26 18:46:16 +00:00
c75b323d31
Add support for hard disks
2020-12-26 17:44:48 +00:00
b8b56e1f45
make logdrv also use int13 stub
2020-12-26 16:43:04 +00:00
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
