Retro/pcem
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1,454 commits 3 branches 0 tags 5.5 MiB
Commit graph pcem/src/808x.c
Author SHA1 Message Date
SarahW
50e7de5214 Merge from trunk 2019-04-18 20:46:38 +01:00
SarahW
84a098bc98 Add read-only cassette emulation to IBM 5150 PC. Patch from JohnElliott. 2019-04-17 20:37:23 +01:00
SarahW
18a293d5cc Flush MMU cache on CPU soft reset. Fixes hang on reset under some configurations. 2019-04-14 21:40:32 +01:00
SarahW
73c20a723f Clear integer registers on CPU reset. Fixes hang on reboot on VA-503+. 2019-04-10 20:28:45 +01:00
SarahW
03b5a44aca More CPU sanitisation. 2019-02-08 21:17:56 +00:00
SarahW
5b58b202a1 More CPU sanitisation. 2019-02-07 22:10:34 +00:00
SarahW
dd68b19f0a Second CPU sanitising pass. 2019-02-07 21:53:44 +00:00
SarahW
1af0b660b3 First pass at sanitising CPU headers. 2019-02-07 21:30:53 +00:00
SarahW
3c2dbf063e Remove unused and superfluous variables from mem.c. 2019-02-07 20:23:14 +00:00
SarahW
87031d4d09 Remove readmemb386l() and writememb386l(). 2019-02-07 20:18:03 +00:00
SarahW
ca89a51478 Remove redundant oldcs variable - when processing an exception, oldcs and CS are the same. 2019-01-28 20:00:49 +00:00
SarahW
a4d3aa1912 Move flags and eflags variables into cpu_struct. 2018-11-28 09:42:04 +00:00
SarahW
a7d006b637 Rewrote timer code. 
The new code is based on timestamps, rather than delays. This eliminates the
need to update every timer in timer_process(), which cost a non-trivial amount
of CPU time on low-end machines.

This involved changes to every user of the timer code, so this change almost
certainly introduces bugs.
 2018-08-02 22:06:10 +01:00
SarahW
91143d3c68 Move CPU segment structures into cpu_state structure. 2018-07-22 12:56:03 +01:00
SarahW
0f0a1c3223 Perform NULL segment checks upfront in opcode handlers, rather than on every memory access. 
This removes the need to pass the segment to readmem*l()/writemem*l().
 2018-07-18 22:10:18 +01:00
SarahW
056eefb196 Reset internal cache status correctly on soft CPU reset. Fixes CPU speed detection on Elonex PC-425X. 2018-04-19 22:00:33 +01:00
SarahW
919f2dd45d Implemented CMPXCHG8B on Winchip. Patch from nerd73. 2018-03-03 21:32:56 +00:00
SarahW
b60eff610d Fix IDT limit on reset. Patch from Greatpsycho. 2018-01-08 20:51:06 +00:00
SarahW
8a5b552a9a Correct CS:IP initialisation on 286+ reset. Patch from Greatpsycho. 2018-01-08 20:50:48 +00:00
SarahW
bb4fbdd9c2 Fixed >32 bit shifts on 808x CPUs. Fixes Titus the Fox. 2017-11-05 17:17:58 +00:00
SarahW
354d52754c Indentation fixes. Patch from basic2004. 2017-07-30 08:31:03 +01:00
SarahW
807b710a5d Improvements to path handling. Patch from bit. 2017-07-06 21:25:10 +01:00
SarahW
1f33b52451 Added VME emulation to Intel DX4, Pentium and Pentium MMX. 
Temporarily disabled recompilation of CLI and STI.
 2017-06-30 20:42:19 +01:00
SarahW
083ca3d4a2 Slight optimisation when DS/SS are 'flat' (base=0, limit=4G). 2017-05-24 21:50:37 +01:00
SarahW
e09d483cf5 Fixed typo in 808x cycle count. Patch from hOMER247. 2017-05-06 18:36:09 +01:00
SarahW
4cb5ddd7f7 Implemented undocumented F6/1 and F7/1 TEST instructions. 
Implemented undocumented F1 LOCK and ICEBP instructions.
Implemented missing 286 LOADALL functionality.
SMSW now sets all 12 bits to 1 on 286.
Patch from Greatpsycho.
 2017-04-28 18:47:38 +01:00
SarahW
f41ad36111 Inline functions in 808x.c marked as static. Patch from AmatCoder. 2017-04-19 16:23:43 +01:00
SarahW
8c7959b3d5 Fixed an additional warning. 2017-04-11 19:53:06 +01:00
SarahW
2b892d2a7a Fixed compiler warnings for Windows builds. 
Added -Werror to Windows makefiles.
 2017-04-11 19:34:41 +01:00
SarahW
6d1492ca05 Set EAX to 0 on CPU reset - fixes hang with hard reset on PS/2. 2017-04-09 14:51:27 +01:00
SarahW
9c1d8e5022 Add PS/2 Model 50 emulation. 
This commit also adds basic MCA emulation.
This commit also adds emulation of the PS/2 Type 1 DMA controller.
 2017-04-06 22:00:40 +01:00
SarahW
bfc69a4bea Cleaned up ibm.h a bit 2016-11-28 20:06:17 +00:00
SarahW
1b73963997 Added prefetch timing approximation for 286/386 CPUs, with configurable memory timing. 2016-11-25 21:32:02 +00:00
SarahW
3df46b4479 Memory addressing on XT now wraps at 1MB. 2016-10-09 08:53:04 +01:00
SarahW
eb126fd822 Moved more variables into cpu_state structure. 2016-08-21 21:28:23 +01:00
SarahW
c664682758 Move some more variables into cpu_state structure. Minor speedup (~2%). 2016-08-17 21:28:16 +01:00
SarahW
535604b760 Pack decoded ModR/M data into a single word - minor recompiler speedup. 2016-08-14 16:29:54 +01:00
SarahW
c81a91fd72 Moved integer registers, PC and flags_* variables into new cpu_state structure. Reduces recompiled code size slightly, small speedup (1-3%). 2016-04-20 21:39:41 +01:00
TomW
673a3527af Don't cause illegal instruction exception on unknown REP instruction. Patch from Battler. 2016-03-17 21:47:56 +00:00
TomW
4a0ece4e75 Added 8088/8086 instruction aliases. Patch from Battler. 2016-01-04 20:47:28 +00:00
TomW
79202cc5c0 Changed timer base frequency on XT models to 14.318MHz - PIT, CGA and 4.77MHz CPU should now stay in perfect sync. 2015-11-25 21:50:38 +00:00
TomW
0b06c15ae5 Added missing SETALC instruction to 808x.c 2015-11-25 21:25:21 +00:00
TomW
3d35442da7 Removed duplicate PIT counting from 808x.c - fixes some timing issues with XT machines. 2015-11-25 21:25:01 +00:00
TomW
c47df21a82 XT models can now have less than 640kB RAM. 2015-11-18 20:28:57 +00:00
TomW
2efc56e882 Reset triggered by keyboard controller should now be handled correctly by dynamic recompiler. 2015-08-31 19:31:23 +01:00
TomW
f339f00315 Interpreter and dynamic recompiler now present in a single binary. 2015-08-21 20:55:36 +01:00
TomW
08254b8dfb Initial 64-bit recompiler. 
Various 64-bit fixes.
Various fixes to allow building under MinGW-w64.
 2015-07-18 12:11:54 +01:00
TomW
6bc394b4c6 Recompiler now handles reset caused by a newly generated codeblock. 2015-07-12 15:22:58 +01:00
TomW
b4592cdea3 Implemented new memory mapping to improve performance of self modifying code. 
New scheme allows code blocks to cross pages.
Reduced code block size down to 2kB.
 2015-01-28 21:58:02 +00:00
TomW
4676daade4 Initial commit of dynamic recompiler. 
Various CPU changes to support dynamic recompiler.
 2014-11-05 21:24:16 +00:00