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UniPCemu is very slow when compiled for Android?

Posted on 2016-09-03, 13:32

When I compile and run UniPCemu for and on Android, it runs, but it's terribly slow(maxes out at 2500 cycles/second(it's CPU emulation is running at 4.77MHz, so it's running at a speed of 2500 out of ~4770000 cycles needed to run at full speed)). On the PC(2.0GHz+ Dual core/Quad Core CPU) this is …

Making UniPCemu's hardware run independently of emulated CPU speed without breaking cycle accuracy with hardware?

Posted on 2016-09-01, 08:59

by superfury

in PC Emulation

I'm currently using the following code with my cycle-accurate CPU/hardware emulation: extern uint_32 CPU_InterruptReturn, CPU_exec_EIP; //Interrupt return address! extern byte allcleared; double currenttiming = 0.0; //Current timing spent to emulate! extern byte Settings_request; //Settings …

Re: Anything my unipcemu emulator still needs?

Posted on 2016-09-01, 07:51

by superfury

in PC Emulation

UniPCemu is now properly able to basically(full touch input and Settings menu support) run on Android devices using either lib-SDL(Pelya's) or SDL2 with the toolchains(SDL2 on Android SDK/NDK). The only problem left is that it seems to be idling after returning from the Settings menu or boot option( …

Re: Pelya's libSDL vs SDL2 Android touch events?

Posted on 2016-08-30, 09:28

by superfury

in PC Emulation

I've looked at https://github.com/pelya/commandergenius/blob/sdl_android/project/jni/application/xserver/gfx.c . Looking at the way it processes x and y coordinates, it seems that the event->jball.xrel and event->jball.yrel contain the actual coordinates on the screen, not relative coordinates (- …

Pelya's libSDL vs SDL2 Android touch events?

Posted on 2016-08-29, 09:05

by superfury

in PC Emulation

I've added a simple compatibility layer from Pelya's libSDL 'Joystick' touch events to provide SDL2 touch events. This doesn't seem to be working correctly on Pelya's libSDL somehow? Anyone knows what's going wrong here? From https://bitbucket.org/superfury/unipcemu/src/ …

Re: IBM PC hardware clock division (XT 14MHz clock)?

Posted on 2016-08-28, 20:40

by superfury

in PC Emulation

Like I said, my video card rendering is has a shared CRT emulation, which handles (S)VGA vs CGA/MDA style rendering. Mostly unchanged, CGA/MDA add a little logic to it, together with scanline buffering. The basic CRT emulation(which runs at 25Mhz, 28Mhz, 14Mhz or MDA speed) is used by all video …

Re: IBM PC hardware clock division (XT 14MHz clock)?

Posted on 2016-08-28, 13:33

by superfury

in PC Emulation

I've modified the Game Blaster and OPL2(Adlib) emulation to use those correct dividers to produce their sampling rates(512 for Game Blaster audio, 288(=4 times 72) for OPL2 audio, which is further divided by 4 to get the 80us counter(which already is divided by 4 to get the 320us timing)). The Sound …

Re: IBM PC hardware clock division (XT 14MHz clock)?

Posted on 2016-08-27, 14:53

by superfury

in PC Emulation

So the DMA controller takes 1 cycle for each byte to transfer, so about 4.77 MegaBytes(MB) per second, not depending on CPU speed? With the YM3812 I need the resulting 80us(and 320us by further division) times used to divide that 3.58MHz signal. Do you know what it uses? I already have a global …

IBM PC hardware clock division (XT 14MHz clock)?

Posted on 2016-08-27, 13:59

by superfury

in PC Emulation

I know that: - The CPU divides by 3 to get 4.77MHz. - The PIT divides by 12 to get 1.19MHz. - DMA by about 9 on average to get it's transfer rate in bytes/second? - Adlib output sampling frequency is divided by 288 to get ~49kHz? I still need the following timings for optimizing my emulation to use …

Re: Using custom bytecode to implement CPU cycle accuracy?

Posted on 2016-08-25, 10:04

by superfury

in PC Emulation

@Jepael: The function pointer table currently already happens for the entire 'execution' phase(reading data from modR/M address or direct address, modifying registers, writing data to memory at the end if required). The problem is that, when those seperate phases have to be emulated seperately(like …

Sdl2 Android storage detection?

Posted on 2016-08-22, 20:50

by superfury

in PC Emulation

Android has an option to move files of an application to the external SD or sdcard0(internal memory). Is there a way for SDL2 software(like UniPCemu I'm working on getting it working) to detect which of the two media the user has selected? So, when the user moves the files to/from external/internal …

Re: Using custom bytecode to implement CPU cycle accuracy?

Posted on 2016-08-22, 12:40

by superfury

in PC Emulation

So what should those 'lowlevel' operations be? I understand parts about "read a parameter from the prefetch"(with block), "read immediate address from memory", "read modrm from memory" etc., but what should be implemented at the core of execution commands? Simple 'add','sub','wait for next cycle on …

Re: Running UniPCemu on Android hangs the application with insane numbers?

Posted on 2016-08-22, 11:48

by superfury

in PC Emulation

I've changed the code to simply execute the time_tick variable assignment during the initialization procedure instead of at compilation, but don't know yet if it works on an Android device(still waiting for a response of anyone having tested it on Android). https://bitbucket.org/superfury/unipcemu. …

Re: Running UniPCemu on Android hangs the application with insane numbers?

Posted on 2016-08-22, 11:41

by superfury

in PC Emulation

The original code already declared it as a constant: const double abc=(1000000000/(1.0/2.0)) Actually, the number that was dividing was a 1.19MHz double floating point division: //Exact 14Mhz clock used on a PC! #define MHZ14 ((15.75/1.1)*1000000.0) //The clock speed of the PIT (14.31818MHz divided …

Using custom bytecode to implement CPU cycle accuracy?

Posted on 2016-08-22, 10:41

by superfury

in PC Emulation

To make my emulation CPU more cycle-accurate, would it be benificial to create a 16-bit kind of bytecode/microcode blocks that's stored inside the emulator for every virtual (8086/8088) CPU instruction, which is actually the basic steps done by a CPU to execute it's instruction? Like load from …

Running UniPCemu on Android hangs the application with insane numbers?

Posted on 2016-08-21, 17:37

by superfury

in PC Emulation

When I compile it for Windows etc., I end up with (1000000000/1190000)(=PIT frequency), ending up with a variable (which is calculated when compiling) containing about 800(the amount of nanoseconds for a PIT tick). But instead, the application ends up with a number about 1.728413e-306, which causes …

Re: UniPCemu emulator releases

Posted on 2016-08-19, 18:55

by superfury

in Release Announcements

A little update containing a big Settings bugfix, as well as a new Turbo mode for 8086 emulation: UniPCemu_20160819_2037.zip Changelog: - Implemented Turbo XT BIOS Turbo functionality, speeding up the CPU to ~10MHz(Default setting) or the specified speed in the Settings. - Fixed Settings checksum …

Is it legal to distribute open-source ROMs with UniPCemu?

Posted on 2016-08-19, 08:42

by superfury

in PC Emulation

My emulator can use two open-source ROMs afaik: Generic Super PC/Turbo XT BIOS v2.6 and the XT-IDE BIOS(No VGA, unfortunately, although (S)VGA defaults to the internal, Dosbox-based BIOS). Can I distribute these with UniPCemu legally, or do users still have to get it from their original websites?

Re: UniPCemu emulator releases

Posted on 2016-08-18, 13:05

by superfury

in Release Announcements

My latest UniPCemu build: UniPCemu_20160818_1406.zip Changelog: - Added Sound Blaster 1.5, as well as Sound Blaster 2.0 emulation, partially based on Dosbox(the ADPCM decompression functions), but with improvements and accuracy. - Sound Blaster emulation now automatically enables Adlib and MPU …

Dosbox's Sound Blaster DSP(older than SB16) DMA ADC bug?

Posted on 2016-08-18, 12:15

by superfury

in DOSBox Development

When the DSP is given the DMA ADC(command 0x24), according to the documentation I found, returns the first sample in Direct Mode instead. Dosbox gives all samples using pure DMA transfers. 024h DMA ADC, 8-bit SB COMMAND->LENGTHLOBYTE->LENGTHHIBYTE DESCRIPTION Initiates 8-bit DMA transfer (record). …

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UniPCemu is very slow when compiled for Android?

Making UniPCemu's hardware run independently of emulated CPU speed without breaking cycle accuracy with hardware?

Re: Anything my unipcemu emulator still needs?

Re: Pelya's libSDL vs SDL2 Android touch events?

Pelya's libSDL vs SDL2 Android touch events?

Re: IBM PC hardware clock division (XT 14MHz clock)?

Re: IBM PC hardware clock division (XT 14MHz clock)?

Re: IBM PC hardware clock division (XT 14MHz clock)?

IBM PC hardware clock division (XT 14MHz clock)?

Re: Using custom bytecode to implement CPU cycle accuracy?

Sdl2 Android storage detection?

Re: Using custom bytecode to implement CPU cycle accuracy?

Re: Running UniPCemu on Android hangs the application with insane numbers?

Re: Running UniPCemu on Android hangs the application with insane numbers?

Using custom bytecode to implement CPU cycle accuracy?

Running UniPCemu on Android hangs the application with insane numbers?

Re: UniPCemu emulator releases

Is it legal to distribute open-source ROMs with UniPCemu?

Re: UniPCemu emulator releases

Dosbox's Sound Blaster DSP(older than SB16) DMA ADC bug?