BOP numbers are 1 byte and map to a function (over 255). But one can pass additional "parameters" to those functions by adding extra bytes, however such functions must advance "by hand" the instruction pointer.
[NTVDM]
- Take into account our previous remark for the BIOS interrupt stubs, and comment them.
- Rework EmulatorBiosOperation (move almost all of its existing code into subfunctions in bop.c) so that one can call many other BOP functions in the future (WIP). The BOP number (still called) EMULATOR_INT_BOP (of value 0xFF) is used for internal 16 --> 32 bit switching for our 32bit bios.
- It appears that the IoRead/WriteCallback and IdleCallback must not be NULL for using fast486. I'm committing a temporary fix that I will definitely fix in a subsequent commit.
svn path=/branches/ntvdm/; revision=60812
Separate external interrupts from interrupt signals (which are
interrupts whose number is not known until they can be serviced,
just like hardware interrupts on a real CPU).
[NTVDM]
Improve the PIC emulation code (IRQ priorities, etc...).
Instead of checking for interrupts in the main loop, move the
PS/2 input parsing to a different thread.
Improve BIOS keyboard IRQ handling.
svn path=/branches/ntvdm/; revision=60761
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
Implement the hardware interrupt system.
Modify Soft386Interrupt to assume hardware interrupts, because
software interrupts from outside the emulator may cause race conditions.
svn path=/branches/ntvdm/; revision=60696
Implement the LES and LDS instructions.
Add optional support for BOPs (NTVDM-specific).
Fix prefix handling in some functions.
[NTVDM]
Enable BOPs for Soft386 (when NEW_EMULATOR is defined).
Fix the calling convention issue (softx86 uses cdecl, soft386 uses stdcall).
svn path=/branches/ntvdm/; revision=60395
Synchronize with trunk again to fix important bugs in the build system.
Implement register control functions which should be exported (Adapted from a patch by Hermes Belusca-Maito).
The actual export is temporarily disabled because a bug in the build system compiles ntvdm as a DLL instead of an EXE.
svn path=/branches/ntvdm/; revision=59684
- Don't leak console input/output handles when opening them in BiosInitialize.
- Deinitialize the emulator in the reverse order it was initialized.
- Simplify VgaGetVideoBaseAddress and VgaGetVideoLimitAddress and use the former one in VgaTranslate[Read-Write]Address.
- Use only unicode Win32 APIs where it's needed.
svn path=/branches/ntvdm/; revision=59659
Implement Video Graphics Array (VGA) support.
Replace the old BIOS video code with new code that uses the VGA.
svn path=/branches/ntvdm/; revision=59648
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
Remove the old "INT 0xFF" hack and instead use an invalid opcode sequence for emulator operations.
Fix the flags register update bug.
svn path=/branches/ntvdm/; revision=59565
Fix jump conditions.
[NTVDM]
Implement BIOS teletype output command.
Start implementation of a new CPU emulator to replace softx86.
svn path=/branches/ntvdm/; revision=59450
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
Start of an implementation of a software DOS emulator.
Brought to you by Aleksandar Andrejevic. Good luck ;)
Remove the old language files. They will be recreated when the time comes.
svn path=/branches/ntvdm/; revision=59249
