UniPCemu build 2023/01/03 14:55 is now live!

The latest build of UniPCemu is now released!

It has various CPU and hardware improvements, various hardware settings changed to become architecture-specific and the System Management Mode CPU mode added to it's emulation on some emulated architectures!

UniPCemu:

• Implemented a configuration option to protect the BIOS boot ROM block.
• Fixed BIOS flash ROM issues.
• Optimized BIU memory read caching.
• Implemented x86 SMM on Pentium, Pentium Pro and Pentium II processors.
• Improved hidden IDTR/GDTR cache emulation to include access rights.
• Improved x86 PAE loading and caching of the PDPT entries.
• Improved PAE and PSE reserved bits faulting.
• Improved CR4 PGE emulation to flush caches when needed.
• Improved debug messages.
• Improved ejected CD-tray to show an icon of an ejected CD-ROM disc tray.
• Implemented i430fx/i440fx/i450gx STPCLK signal and CPU halting.
• Made SMRAM compatible with 4 CPUs instead of just two CPUs.
• Fully implemented i430fx/i440fx/i450gx SMI.
• Improved ATAPI IRQ handling when finishing a command.
• Implemented APIC SMI triggers.
• Implemented serial control lines to immediately send control signals without timing when nothing is queued.
• Improved APIC reads and writes to non-existing addresses to always be zeroed.
• Implemented IO APIC SMI signal mapping.
• Implemented i450gx 512K memory block to be properly unmapped if required to be unmapped.
• Fixed APIC unmapped error status to work correctly again.
• STPCLK blocks interrupts only.
• Improved STPCLK to affect instruction boundaries only outside of SMM.
• Improved NMI masking to be performed at the CPU itself.
• Implemented STPCLK during NMI handling.
• Improved interrupt masking during SMM, NMI and STPCLK assertion.
• Ignore STPCLK for interrupt handling by (A)PIC during SMM and NMI handling.
• Simplified memory address precalcs to not be using reserved memory.
• Fixed maximum memory to be using the proper translated address.
• Fixed Compaq mid memory block lowering.
• Cleaned up MMU mapping code unused variables.
• Improved the information row to allow dynamic content.
• Fixed debugging row to display content correctly.
• Fixed i430fx memory remapping.
• Restored Compaq mid memory remapping.
• Fixed ISA memory hole start address.
• Fixed SMM to force a CPL of 0.
• Implemented CR0 and CR4 register validation and shutdown when executing RSM.
• Fixed SMM RSM shutdown detection when verifying CR0/CR4.
• Improved directory autodetection support.
• Made directory support more cross-platform.
• Made path seperators proper on non-linux paths.
• Made the Sound Blaster IRQ configurable as a architecture setting.
• Split the GPU functionality into the GPU unit from the headers.
• Fixed code to compile again with the new common settings support.
• Fixed input settings  to be properly updated again.
• Cleaned up 386 opcodes.
• Cleaned up MMU variables.
• Made the video card input to the 8042 setting a parameter to the initialization function.
• Moved the CMOS loading and saving support to the BIOS.
• Fixed missing CMOS function in the BIOS module.
• Moved all architecture-specific hardware settings to be automatically loaded into and from the architecture-specific settings instead of global settings.
• Fixed converting from the old settings file format to the new settings file format.
• Fixed the settings version to be compatible with older versions again.
• Fixed CMOS saving to properly leave the new transferred fields alone in the settings file.
• Fixed missing comments needing to be moved to the CMOS fields.
• Cleaned up settings loading code.
• Renamed the video 'synchronization' setting field to become 'videocardsynchronization'.
• Moved not common PS/2 keyboard data to the PS/2 keyboard module.
• Fixed kp* key shift handling.
• Implemented backing storage for all XT RTC registers.
• Implemented the XT RTC status register.
• Implemented the XT RTC counter/RAM reset writes.
• Implemented the XT RTC "GO" command.
• Implemented the XT RTC Alarm function in with limited compatibility.
• Properly trigger OPL2 CSM note-off.
• Fixed OPL2 CSM forcing a key on.
• Made the 320us timer use further division of the 80us clock.
• Implemented different XT RTC Synchronization modes. It can now not synchronize again, fully synchronize or synchronize to 100th or whole seconds.
• Improved the OPL2 timer control register to behave better than it did before with timer status flags, clearing them in some cases.
• Updated the common emulator framework to the latest commit.
• Cleaned up CMOS time updating code.
• Fixed scancode set 0 tilde key break scancode.
• Updated SDL2 on Windows and Android to version 2.26.1

Common emulator framework:

• Made UniPCemu always support a debug text surface for text rendering.
• Fixed rendering of text surfaces when other modules aren't initialized yet.
• Fixed invalid CPU speed display when the speed is undefined.
• Moved the debug surface text layer to the common emulator framework.
• Added a simplified overlapping detection support for precalculated values.
• Improved video updates on static screens to be properly handled.
• Count the SDL_RENDER_TARGETS_RESET fixed on the SDL2 2.24.2 and up and disable the bugfix.
• Added a CD tray to the custom font.
• Fixed the definition of the triangle UTF code point.
• Improved the information row to allow dynamic content.
• Cleaned up screen updates when using static screen resolutions.
• Added a global define for the path seperator of the host.
• Made path seperators proper on non-linux paths.
• Split more functionality into the GPU structures.
• Moved GPU framerate settings to be using a set function.
• Made all input settings local to the input unit.
• Properly initialize input settings.
• Cleaned up GPU framerate to no longer require bios headers.
• Fixed missing main function headers including.
• Fixed storage detection.
• Fixed GPU missing input header for input OSK support.
• Fixed missing setting loading when not compiling UniPCemu.
• Moved common storage and setting support to the emu_misc header.
• Cleaned up unused log headers.
• Don't make releasing last keys take the shift status into account.
• Made the amount of usable input keys a global define.
• Moved common keyboard data to the input module.
• Removed the PS2 keyboard data module, as it isn't common.
• Fixed PSP-style OSK keypad to use the correct kp key names and mapping for the divide, multiply, minus and plus keys.
• Fixed PSP WiFi connection menu input delay code to compile again.