UniPCemu build 2020/12/16 08:35 is now live!

Since it's a bit of a large update (over 490 commits), I've summarized the main changes and bugfixes for this release:

• Fixed i430fx device ID.
• Improved floppy sense interrupt and perpendicular mode.
• Don't send ACK for enabling the second PS/2 controller.
• Improved Pentium Pro and Pentium II emulation.
• Improved x86 CR register bits.
• Improved CPUID instruction.
• Improved BIOS text input cursor to be a block character instead.
• Added FS breakpoint support.
• Added i440fx motherboard emulation.
• Increased memory limit to 1GB.
• Improved CPU-depending memory limits during detection. 15MB for 80286, 16MB for Compaq, 128MB for i430fx, 1GB for i440fx.
• Improved PIT emulation.
• Implemented a basic Qemu-style logging method for software to use.
• Improved PCI BARs.
• Fixed POST code logging without (valid) translation file.
• Improved ATA and ATAPI device emulation.
• The i440fx uses a default speed of 10MIPS or 66MHz.
• Improved Pentium/Pro/II MSRs.
• Implemented extended CMOS data storage at port 72h/73h.
• Improved PIC interrupt tracking.
• Implemented Local APIC, IO APIC and SMP.
• Implemented Intel 28F001BXT/28F002BXT flash BIOS on i430fx/i440fx.
• Implemented IMCR register.
• Improved CPU INIT vs RESET.
• Made the CPU state per-CPU instead of global.
• Improved Android support for SDL2_net. It's now properly compiled in.
• Hard disk lists in the settings menu can now be viewed, but not un/remounted on a running machine.
• Implemented i430fx/i440fx BIOS flash write protection.
• Fixed first PS/2 port IRQ on the output port.
• Implemented SMP bus locking.
• Multiple processors(up to 2) can now be specified in the settings.
• Improved SMP CPU reset vs INIT.
• The debugger is only attached to the BSP.
• Improved SMRAM emulation.
• Improved CPU reset/init with data locking.
• Updated Android gradle to the latest version.
• Implemented CPUID limit options on the function number.
• Fixed IPS clocking mode bus deadlock.
• Bus locks use a random chance generator.
• Updated the common emulator framework to the latest commit.
• Fixed CMPXCHG affected flags.
• Improved CMPXCHG8B.
• Added missing debugger for the CMPXCHG instructions.
• Improved double fault during page fault.
• Improved 32-bit addressing handling of special register opcodes.
• Implemented all base Pentium Pro/II instructions(no FPU).
• Widened the memory bus to 64-bits.
• Optimized paging.
• Modified the remaining instructions to use the BIU for memory accesses.
• Improved CMOS timer update flag to be reported correctly.
• Flushing the paging TLB also flushes the PIQ.
• Fixed PS/2 keyboard typematic rate/delay command.
• Fixed the paging accessed bit to be always handled.
• Accessing paging structures in RAM now locks the bus.
• Don't fault on pseudo-interrupts checking CPL.
• Log paging pending events during advanced logging.
• Don't check paging for the destination during jumps and call instructions.
• Fixed 16-bit CMPXCHG.
• Fixed VGA scanline data updating during register writes.
• Made VGA byte panning an extension of the horizontal pixel panning register.
• Latch the VGA byte panning during vertical retrace.
• Latch the VGA horizontal pel panning during the end of vertical retrace.
• Improved VGA byte panning to be an extension of horizontal pel panning.

Common emulator framework:

• Implemented a command-line parameter to enable Qemu-style logging support.
• Safeguard log against threads.
• Safeguard file closing.
• Fixed big file close protection.
• Improved sound samplehandlers list.
• Fixed RandomShort not being inlined.
• Fixed random shorts to properly round to generate the full range of possibilities.
• Improved random short with equal chance.
• emu_misc.c: Improved border case of random short chance being out of range.
• Fixed signed/unsigned warning in the 64-bit file read line function.