tkchia
95ed8ee484
plat/msdos386: fix startup code so that it works under dosemu2
...
- do not try to store data through code segment selectors
- set each segment limit to segment size - 1, not segment size
- get PSP segment while still in real/V86 mode (DPMI host
might choose to return PM selector for int 0x21, ah = 0x62)
- other minor fixes
2022-08-23 14:35:43 +00:00
David Given
887ec0656e
Update documentation.
2022-08-19 20:08:39 +02:00
David Given
d24c3f8722
Fix typo.
2022-08-19 20:03:48 +02:00
David Given
c37c0e62cc
Remember to actually update the brk position when calling brk.
2022-08-19 20:03:40 +02:00
David Given
dc1f69be83
Most of read and write now works; filename-based operations partially work; but
...
there's a nasty memory corruption somewhere which needs investigating.
2022-08-19 00:08:57 +02:00
David Given
5329c98b81
Simplify and fix reading and writing so they seem to work.
2022-08-18 21:21:33 +02:00
David Given
cc356b5c75
Programs now start up and can write to the console, but crash when reading.
2022-08-18 00:24:08 +02:00
David Given
48398b072a
write() system calls work; start going through the libsys.
2022-08-17 22:34:06 +02:00
David Given
680b6b9857
Marshal the environment, command line and PSP into 32-bit memory.
2022-08-11 23:36:23 +02:00
David Given
1764c6baa2
Made realloc work; the 32-bit process can now be resized to include bss and
...
stack.
2022-08-10 16:14:12 +02:00
David Given
d464606dd6
We can now load and run 32-bit protected-mode executables. We have not,
...
however, set up the data segment.
2022-08-09 23:49:18 +02:00
David Given
b48b5b13ce
Maybe have a working stub now.
2022-08-09 23:32:41 +02:00
David Given
21b30ccadb
We can now switch to 32-bit mode.
2022-08-08 23:22:00 +02:00
David Given
1e0961c679
Do enough of the boot stub to produce an EXE header and enter DPMI protected
...
mode.
2022-08-08 22:03:12 +02:00
David Given
b81ac5e2c3
Cut-and-paste the msdos86 libsys so the msdos386 stuff now at least builds.
2022-08-07 22:10:08 +02:00
David Given
00c722d2ef
Merge from trunk.
2022-08-07 22:01:08 +02:00
David Given
6d9ac0b182
Add the nonfunctional boilerplate for the MSDOS 386 port.
2022-08-03 20:41:06 +02:00
