Retro/pcem
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579 commits 3 branches 0 tags 5.5 MiB
Commit graph pcem/src/808x.c
Author SHA1 Message Date
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
TomW
7eacf1408a Implemented NMI mask register for XT machines. 
Fixed PC200 NMI stuff.
 2014-09-27 18:39:06 +01:00
TomW
56b455844e Initial port to Linux (using Allegro). 
64-bit fixes.
Some changes to aid portability.
A few other tweaks.
 2014-09-04 21:07:24 +01:00
TomW
262b188790 Implemented CR4 register for Winchip. Currently only Time Stamp Disable (TSD) has an effect. 
Fixed stupid bug in WRMSR - MSRs can now be written with values other than zero.
 2014-08-23 16:28:16 +01:00
TomW
cd2c3b47ed Implemented selector limits on some instructions - fixes LBA2. 
GPFs in real mode now work.
Selectors correctly zeroed on far return to lower privilege.
 2014-08-13 20:33:56 +01:00
TomW
b0320ae16c Moved PIT to common timer API. 2014-06-19 21:02:59 +01:00
TomW
9ba75bd910 Minor memory optimisations. 2014-06-07 15:57:57 +01:00
TomW
e737d2fa45 Loading a segment register in real mode no longer clears USE32. 
CR3 no longer masks values written to it.
Real mode interrupts now take IDT base into account.
Fixes 'huge unreal' mode (flat assembler).
 2014-03-29 14:28:13 +00:00
TomW
2ca4ead570 Implemented preliminary S3 ViRGE 2D blitter emulation. 
Misc ViRGE fixes.
Changes to memory mapping.
Changes to PCI handling.
Disabled 'AMI WinBIOS 486 PCI' due to incomplete chipset emulation.
Invalid GUS register reads no longer kill the emulator.
 2014-03-20 14:03:55 +00:00
TomW
f18f10574a Preliminary PCjr emulation. 
Improvements to PIT and serial emulation.
 2014-01-12 11:37:09 +00:00
TomW
3116b7078b Disable memory dumps on release builds 2013-12-21 20:22:50 +00:00
TomW
36cdd540b2 PIT timers can now be restarted using GATE input - CPU speed detection on SiS496/497 now works. 
Added missing port 0x61 to Olivetti M24 - PC speaker now works on that machine.
Some code tidying.
 2013-11-08 22:32:34 +00:00
TomW
7735e82085 Altered device memory mapping. 2013-10-19 17:06:55 +01:00
TomW
f431e74917 Video optimisations. Fixed VRAM mask on S3. 2013-07-09 19:30:53 +01:00
TomW
58085bcc87 Re-organisation of video emulation. 2013-06-24 20:42:35 +01:00
TomW
f822488656 Add missing files from last commit. 2013-05-27 19:56:33 +01:00
Renamed from src/x86.c (Browse further)