- Move some PS/2 initialization from bios.c to ps2.c
- NULLify interrupt entries which are in fact pointers to data tables.
- Add a framework for adding I/O port handlers.
svn path=/branches/ntvdm/; revision=61107
Finish my Interruption revamp.
- Move interrupt-related code from bop.c to int32.c
- Introduce InitializeInt32 helper so that one can initialize all the needed 16-bit stubs for the 32-bit interrupts.
- Remove unneeded defines in emulator.h and an exported variable in ntvdm.h.
svn path=/branches/ntvdm/; revision=60908
Start my work on modularizing registration of "32-bit" interrupts, i.e.
interrupts that are implemented in 32-bit mode, but are stubbed with 16-bit
code (so that 16-bit apps can call them).
The 16-bit stub code uses a BOP call to our Control BOP function (BOP 0xFF) which
can handle in theory many sub-functions (as the BOP 0x58 documented here: http://www.ragestorm.net/tutorial?id=27)
specified as an additional BYTE in the call:
0xC4 0xC4 bop_code <optional_bop_subfunction>
Here, for calling 32-bit interrupts we use our BOP 0xFF, subfunction 0xFF.
The final aim would be to generate the 16-bit stub code when one calls the RegisterInt32 helper function
(contrary to what's happening now, that is, the 16-bit stub code is generated for all of the interrupts
at BIOS initialization time, and we use it for BIOS and DOS interrupts).
svn path=/branches/ntvdm/; revision=60907
- BIOS: Implement INT 12h (BiosGetMemorySize)
- BOP/DOS: Add some DPRINTs for INT 25h, 2Fh and for unimplemented functions of INT 21h. It's for helping in testing 4DOS.COM
svn path=/branches/ntvdm/; revision=60889
- The DosErrorLevel is stored as a WORD: its LOWORD is the return code and the HIWORD is the termination code.
- When copying CurrentDirectories[...], be sure that we copy maximum DOS_DIR_LENGTH chars.
- Implement (or stubplement) bunch of INT 21h functions: 0x03, 0x04, 0x05, 0x0C, 0x0D, 0x26, 0x37, 0x47, 0x4D and 0x50. Functions 0x18, 0x1D, 0x1E and 0x20 are NULL functions present in DOS for CP/M compatibility only.
- Fix DOS version querying.
- Use set/getAX() instead of EmulatorSet/GetRegister, and use setCF instead of EmulatorSetFlag.
svn path=/branches/ntvdm/; revision=60790
- DOS: the DOS file attributes are one byte.
- BIOS: don't use hardcoded values; use the SEG_OFF_TO_PTR macro introduced earlier; use get/setAX instead of EmulatorGet/SetRegister.
svn path=/branches/ntvdm/; revision=60781
Remove the code that performs waiting in 32-bit mode since that blocks the emulator
and prevents interrupts from working.
Implement a 16-bit waiting system in the interrupt handlers.
Fix the PS/2 interrupt code.
svn path=/branches/ntvdm/; revision=60739
Do not rely on the internal format for console handles. Instead, use a more reliable way, by checking for success when calling a simple console function acting on in/out console handles.
svn path=/branches/ntvdm/; revision=59746
Make the BIOS Data Area accessible to other parts of ntvdm.
Properly redirect read/write access to the console to the keyboard and VGA systems, respectively.
svn path=/branches/ntvdm/; revision=59741
Keep a list of current directories for all drives.
Implement functions that change the default drive and current directory.
svn path=/branches/ntvdm/; revision=59700
Use DOS_CMDLINE_LENGTH instead of MAX_PATH.
Fix bug in DosInitializePsp which allowed writing past the end of the Program Segment Prefix (PSP).
svn path=/branches/ntvdm/; revision=59693
- Use up to 256 parameters for programs (as suggested by the parsing while loop), but don't hardcode this values in many other places.
- The passed command line to ntvdm should be as long as MAX_PATH.
svn path=/branches/ntvdm/; revision=59691
Modify the flags on the stack instead of the flags register directly.
The flags register is restored during IRET so changing it directly does nothing.
svn path=/branches/ntvdm/; revision=59566
Add a compile-time option (not default) to run ntvdm manually with the target executable as a parameter.
Fix screen clearing bug.
Rewrite several INT 10h functions to work for all video pages.
svn path=/branches/ntvdm/; revision=59497
Implement the IOCTL command in VDM DOS.
Rewrite the BIOS video pages support to use only one console buffer (not yet complete).
Fix the BIOS video mode table and several bugs in video functions.
svn path=/branches/ntvdm/; revision=59460
Fix bugs in video memory access emulation.
Implement several missing INT 10h functions.
Resize the console screen buffer on startup.
svn path=/branches/ntvdm/; revision=59421
Fix several bugs:
The file was not entirely read due to an integer overflow.
The second WORD of the Program Segment Prefix (PSP) is not the number of allocated
paragraphs, but the segment of the last paragraph.
Fix the order of registers (SI and DI were mixed up with SP and BP).
Implement interrupt 0x11.
Implement redirection for reading/writing characters.
svn path=/branches/ntvdm/; revision=59409
Use 286 mode in softx86.
Implement "Get / Set Disk Transfer Area".
Start implementation of PS/2 controller.
Improve hardware interrupts. Fix CLI / STI / HLT instruction support.
svn path=/branches/ntvdm/; revision=59343
