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Author SHA1 Message Date
Aleksandar Andrejevic 37b16fec31 [FAST486] 
Fix a bug in Fast486LoadSegment.


svn path=/branches/ntvdm/; revision=61062
 2013-11-21 03:18:34 +00:00
Aleksandar Andrejevic f90a1db2b7 [FAST486] 
The top half of EIP is cleared after a 16-bit jump.


svn path=/branches/ntvdm/; revision=61058
 2013-11-20 14:21:47 +00:00
Aleksandar Andrejevic 459e3a6f48 [FAST486] 
Read the LDT instead of the GDT when the table indicator is set.


svn path=/branches/ntvdm/; revision=61057
 2013-11-20 10:48:26 +00:00
Aleksandar Andrejevic e2fb91925e [FAST486] 
Implement privilege checks when loading the code selector.


svn path=/branches/ntvdm/; revision=61056
 2013-11-20 10:43:12 +00:00
Aleksandar Andrejevic b456a8b355 [FAST486] 
Make the parameters to Fast486ReadModrm*Operands optional, so that
unnecessary extra reads aren't performed. This also eliminates the
need for dummy variables.


svn path=/branches/ntvdm/; revision=61055
 2013-11-20 08:01:10 +00:00
Hermès Bélusca-Maïto 8998a96d56 [NTVDM] : Implement getMSW and setMSW for getting and setting the Machine Status Word (lower word of CR0). 
[FAST486]: MSW = Machine Status Word

svn path=/branches/ntvdm/; revision=61044
 2013-11-18 20:25:10 +00:00
Hermès Bélusca-Maïto 74933952b5 [NTVDM] 
- Get rid of EmulatorGetRegister and EmulatorSetRegister and replace their calls with the proper definitions.
- Get rid of the enums EMULATOR_REG_* and use the FAST486_REG_* definitions instead.

svn path=/branches/ntvdm/; revision=61034
 2013-11-18 01:16:19 +00:00
Hermès Bélusca-Maïto c519c1610e [NTVDM] 
- Implement and export getEFLAGS and setEFLAGS.
- Do some code reorganization (move all registers-related functions into "registers.c").

svn path=/branches/ntvdm/; revision=61033
 2013-11-18 00:45:00 +00:00
Hermès Bélusca-Maïto fb031ba118 [NTVDM] 
Initialize LastClockUpdate, LastVerticalRefresh and LastCyclePrintout with the value of StartTickCount.

svn path=/branches/ntvdm/; revision=61021
 2013-11-17 20:44:23 +00:00
Hermès Bélusca-Maïto da7d643e51 [NTVDM] 
- Use MAX/MINSHORT instead of CRT macros.
- Include only the relevant headers.

svn path=/branches/ntvdm/; revision=61014
 2013-11-16 23:11:54 +00:00
Aleksandar Andrejevic 4b005f11bf [FAST486] 
- When accessing memory using ESP, make the SS segment default.
- The INT instructions always pushes 16-bit values in real mode, regardless
  of the operand/address size attributes.


svn path=/branches/ntvdm/; revision=61000
 2013-11-15 20:49:48 +00:00
Aleksandar Andrejevic f5d0d3e784 [FAST486] 
The CS cached descriptor has the default operand size, even for stack
operations.


svn path=/branches/ntvdm/; revision=60996
 2013-11-15 04:16:25 +00:00
Aleksandar Andrejevic bbc9efd2d9 [FAST486] 
- Fix the privilege checks.
- Store the CPL in a special field, so that it doesn't get mixed up
  with the lowest 2 bits of real mode selectors while switching
  into protected mode.
- Reset the exception count after a successful ISR call.
- In Fast486OpcodeGroup0F01, check for prefix overrides after parsing
  the Mod-Reg-R/M, which might add a SS: prefix override in some cases.


svn path=/branches/ntvdm/; revision=60995
 2013-11-15 02:32:08 +00:00
Aleksandar Andrejevic 5e54387a9c [FAST486] 
Fix the previous fix. ESI was already updated earlier in the function.


svn path=/branches/ntvdm/; revision=60990
 2013-11-14 03:11:33 +00:00
Aleksandar Andrejevic 14a31007fc [FAST486] 
Fix previous fix.


svn path=/branches/ntvdm/; revision=60989
 2013-11-14 03:03:23 +00:00
Aleksandar Andrejevic 9c66549845 [FAST486] 
Update the register values in REP LODS.


svn path=/branches/ntvdm/; revision=60988
 2013-11-14 02:54:20 +00:00
Aleksandar Andrejevic cdf876ead9 [FAST486] 
Fix the BSF and BSR instructions. Partially fix SHLD and SHRD.


svn path=/branches/ntvdm/; revision=60987
 2013-11-14 02:39:54 +00:00
Aleksandar Andrejevic a3513c8f18 [FAST486] 
Fix previous fix.


svn path=/branches/ntvdm/; revision=60985
 2013-11-13 22:34:38 +00:00
Aleksandar Andrejevic cd496c8e21 [FAST486] 
XADD: Fix the order of operations.
POP <modrm>: The value must be popped from the stack before parsing the
Mod-Reg-R/M, because of the "POP DWORD [ESP]" case.


svn path=/branches/ntvdm/; revision=60984
 2013-11-13 22:33:37 +00:00
Aleksandar Andrejevic 53dfb7da48 [FAST486] 
LOOP and JECXZ use the ADSIZE attribute, not OPSIZE.


svn path=/branches/ntvdm/; revision=60977
 2013-11-13 19:20:04 +00:00
Aleksandar Andrejevic ace025dca9 [FAST486] 
The bit number should be normalized to [0, DataSize- 1], not [0, 2 ^ DataSize - 1].


svn path=/branches/ntvdm/; revision=60975
 2013-11-13 18:14:01 +00:00
Aleksandar Andrejevic acccaf3a90 [FAST486] 
Fix a bug in the ROL and ROR instructions.


svn path=/branches/ntvdm/; revision=60972
 2013-11-13 13:32:00 +00:00
Aleksandar Andrejevic c7de214d81 [FAST486] 
Fix several bugs in Fast486RotateOperation.


svn path=/branches/ntvdm/; revision=60969
 2013-11-13 02:38:36 +00:00
Aleksandar Andrejevic 677810ea95 [FAST486] 
Don't return uninitialized variables.


svn path=/branches/ntvdm/; revision=60967
 2013-11-12 21:55:05 +00:00
Aleksandar Andrejevic 2da0e38fbc [FAST486] 
In rotate operations, the count is always masked with 0x1F, regardless
of the operand size.


svn path=/branches/ntvdm/; revision=60966
 2013-11-12 19:25:50 +00:00
Aleksandar Andrejevic ac9f8a81e3 [FAST486] 
Don't forget to check for the operand/address size prefix.


svn path=/branches/ntvdm/; revision=60964
 2013-11-12 18:40:13 +00:00
Aleksandar Andrejevic 0aed89f779 [FAST486] 
Fix the 3-byte IMUL instruction. If the operand size is 16-bit, the
result should be written in 16-bit too.


svn path=/branches/ntvdm/; revision=60963
 2013-11-12 18:21:30 +00:00
Aleksandar Andrejevic cf559336a1 [NTVDM] 
The command line in the PSP consists only of the parameters, the program
name is omitted.


svn path=/branches/ntvdm/; revision=60959
 2013-11-12 01:56:18 +00:00
Aleksandar Andrejevic 1ff6bc0f8f [NTVDM] 
Report the correct number of paragraphs in the PSP of a COM program.


svn path=/branches/ntvdm/; revision=60958
 2013-11-12 00:49:02 +00:00
Aleksandar Andrejevic 92d4dd2b64 [FAST486] 
Check for interrupts at the end of a cycle, to avoid confusing
debug output.


svn path=/branches/ntvdm/; revision=60956
 2013-11-11 20:55:33 +00:00
Aleksandar Andrejevic b781febbfe [NTVDM] 
Implement vertical scrolling in BiosScrollWindow.


svn path=/branches/ntvdm/; revision=60955
 2013-11-11 20:41:55 +00:00
Aleksandar Andrejevic c7a7dbe7e2 [FAST486] 
Fix the previous fix in the Mod-Reg-R/M parser. EBP is still used
if the mode is 1 or 2.


svn path=/branches/ntvdm/; revision=60948
 2013-11-11 19:08:28 +00:00
Aleksandar Andrejevic eaf248fe87 [NTVDM] 
Implement CMOS registers 15h, 16h, 17h and 18h.


svn path=/branches/ntvdm/; revision=60946
 2013-11-11 17:59:04 +00:00
Aleksandar Andrejevic 1d21bb125f [FAST486] 
Fix the Mod-Reg-R/M parser. EBP cannot be used as a SIB byte base,
instead it's used to mark that the base is an immediate operand.


svn path=/branches/ntvdm/; revision=60944
 2013-11-11 17:24:22 +00:00
Hermès Bélusca-Maïto 0d174d717c [NTVDM]: Display more detailed information about which unknown interruption was called. 
svn path=/branches/ntvdm/; revision=60943
 2013-11-11 17:05:02 +00:00
Aleksandar Andrejevic 9ccaa9f1c4 [NTVDM] 
Implement INT 15h, AH = 87h, "Copy Extended Memory".


svn path=/branches/ntvdm/; revision=60942
 2013-11-11 16:47:10 +00:00
Hermès Bélusca-Maïto 77930f2a21 [FAST486]: Put the inlined function in its proper file. No code changes. 
svn path=/branches/ntvdm/; revision=60940
 2013-11-11 15:34:18 +00:00
Aleksandar Andrejevic 8389b692ea [FAST486] 
Fix Fast486GetCurrentPrivLevel.


svn path=/branches/ntvdm/; revision=60939
 2013-11-11 15:27:54 +00:00
Aleksandar Andrejevic e53821aed0 [NTVDM] 
Implement the miscellaneous BIOS system service (INT 15h) handler.
Implement INT 15h, AH = 88h, "Get Extended Memory Size".


svn path=/branches/ntvdm/; revision=60938
 2013-11-11 04:00:10 +00:00
Aleksandar Andrejevic 442302eeb3 [NTVDM] 
Give the virtual machine 16 MB of memory, for DOS extenders,
protected mode programs, etc...
EMS is still not implemented.


svn path=/branches/ntvdm/; revision=60937
 2013-11-11 03:45:39 +00:00
Aleksandar Andrejevic e3c68b1796 [FAST486] 
Fix a bug in the LDS and LES instructions.


svn path=/branches/ntvdm/; revision=60936
 2013-11-11 03:16:07 +00:00
Aleksandar Andrejevic f3df799dc2 [FAST486] 
Implement the LSS instruction.
Fix a bug in LFS and LGS.


svn path=/branches/ntvdm/; revision=60935
 2013-11-11 03:14:18 +00:00
Hermès Bélusca-Maïto ff2d706fb5 [NTVDM]: Fix CMOS file sharing access (so that we allow multiple ntvdm running with the same cmos data). 
svn path=/branches/ntvdm/; revision=60934
 2013-11-11 02:35:06 +00:00
Aleksandar Andrejevic cc1f7c6985 [NTVDM] 
To make debugging easier, put the interrupt handlers at offset 0x1000,
and reserve 16 bytes for each. Also, move the common stub to offset
0x2000. That way the entry point of, for example, INT 0x21 is at
F000:1210.


svn path=/branches/ntvdm/; revision=60933
 2013-11-11 02:27:29 +00:00
Aleksandar Andrejevic 153e815f93 [FAST486] 
We don't support in-circuit emulation opcodes such as USERMOV.
The 486 does not have the JMPE or POPCNT instructions.


svn path=/branches/ntvdm/; revision=60932
 2013-11-11 01:14:24 +00:00
Hermès Bélusca-Maïto 045f939e5c [FAST486]: Remove an extra "return TRUE;" 
svn path=/branches/ntvdm/; revision=60931
 2013-11-11 01:02:48 +00:00
Aleksandar Andrejevic 83b597be5a [FAST486] 
Implement SHLD and SHRD.


svn path=/branches/ntvdm/; revision=60930
 2013-11-11 00:57:59 +00:00
Aleksandar Andrejevic 43bbc0afb4 [FAST486] 
Implement the two operand version of IMUL.


svn path=/branches/ntvdm/; revision=60929
 2013-11-11 00:10:46 +00:00
Aleksandar Andrejevic 9677ec13ad [FAST486] 
Don't mix up ADSIZE and OPSIZE (continued).


svn path=/branches/ntvdm/; revision=60927
 2013-11-10 23:42:57 +00:00
Aleksandar Andrejevic a2f3c339f4 [FAST486] 
Don't mix up ADSIZE and OPSIZE.


svn path=/branches/ntvdm/; revision=60926
 2013-11-10 23:34:34 +00:00