Re: Test suite for Win32s?

Posted on 2019-05-31, 19:33

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by superfury

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Do you mean the Freecell program that it installs immediately after win32s? My memory is a bit hazy on the subject, but yes you are correct. If that program runs without any issues, then you may want to look into something else in your configuration. I would recommend making sure you also have the …

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Re: Test suite for Win32s?

Posted on 2019-05-31, 17:49

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by superfury

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Do you mean the Freecell program that it installs immediately after win32s? That seems to work without noticable problems. I do still see Hocus Pocus Pink hanging trying to use the menu bar, though.

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Test suite for Win32s/WinG?

Posted on 2019-05-31, 11:47

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by superfury

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Are there any test programs or test suite for win32s? Since win32s is crashing my emulator in one case(Pink Panther in Hocus Pocus Pink), using the menu bar.

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Re: x86 CPU emulation test suite?

Posted on 2019-05-30, 15:42

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by superfury

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I tried running the attachment by Stiletto on my emulator, UniPCemu. It seems to crash most of the time, due to an IRQ0 firing due to interrupts being available while it's loading the executable? Is that supposed to happen with CWSDPMI? (sorry if I'm necroposting here, but it's related)

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Re: Any good MS-DOS 80386/80486/Pentium(on slow system) games for testing Protected mode emulation and instructions?

Posted on 2019-05-30, 15:38

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by superfury

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Just found out something interesting: CWSDPMI being used by the testsuite seems to crash, depending on the interrupts that are occurring. If a timer interrupt gets in between while it's loading the executable(the DPMI-enabled program, in this case the testsuite), CWSDPMI double faults into oblivion( …

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Re: Any good MS-DOS 80386/80486/Pentium(on slow system) games for testing Protected mode emulation and instructions?

Posted on 2019-05-29, 16:10

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by superfury

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Hmmm... The Pink Panther in Hocus Pocus Pink has changed somewhat. It now doesn't even start, crashing WFW 3.11 to the MS-DOS prompt? Edit: I also tried running the QEMU testsuite again. Both the testsuite and CWSDPMI now crash with a Double fault? Edit: Interestingly enough, after running the QEMU …

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VGA split screen vs multiple monitors?

Posted on 2019-05-29, 09:39

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by superfury

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Is there a difference between VGA's split screen and dual monitors? What about screen splitters? How do they work?

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Re: x86 #GP/#SS fault in modern operating systems?

Posted on 2019-05-29, 07:10

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by superfury

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Also, besides NTVDM, what about 16-bit Windows applications(on 32-bit Windows flavours)? Also, Although Microsoft doesn't support it anymore on 64-bit versions of Windows, the x86-64 CPUs still theoretically support those in 64-bit long mode?

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Re: x86 #GP/#SS fault in modern operating systems?

Posted on 2019-05-29, 04:55

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by superfury

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What about software running inside the NTVDM? That still exists inside 32-bit Windows flavours?

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Re: Any good MS-DOS 80386/80486 games for testing Virtual memory support?

Posted on 2019-05-28, 11:21

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by superfury

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Installing Windows 95a on the 80386 emulation goes fine until just after the reboot. But eventually it still crashes on some unknown user-mode driver. I see exactly one page fault, at DS(30):CB1008? It happens directly after the B drive motor has spinned up(propably the floppy PDR driver), when it's …

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Re: x86 #GP/#SS fault in modern operating systems?

Posted on 2019-05-28, 11:18

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by superfury

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What about Windows software executing reserved system instructions? Like LIDT etc., which throw #GP(0) when not privileged? Or protected-mode software throwing #GP(selector)? Do they always terminate the application/driver, or do they support some special actions with them(like simulating it's …

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Re: Any good MS-DOS 80386/80486 games for testing Virtual memory support?

Posted on 2019-05-27, 19:47

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by superfury

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Just tried reinstalling Windows 95 with the latest bugfixes on my Pentium emulation(without FPU). It resulted in the next button during the User Information setup step giving a: Error SU995029 Error in System Detection services (0x13a5) Inside a Dialog with the titel bar saying "Setup". Edit: Hmmm …

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x86 #GP/#SS fault in modern operating systems?

Posted on 2019-05-27, 15:24

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by superfury

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Is the #GP/#SS fault used in any case with modern operating systems, but for other effects than terminating the offending program/driver/OS? I can imagine handing #NP/#SS for dynamically loading segments into memory(when swapped out), but modern operating systems might not use them anymore? Do …

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Re: Combining plop BIOS ROM with xt-ide universal bios?

Posted on 2019-05-26, 17:48

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by superfury

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Just managed to get it partly working. I created a simple plpbtrom.bin file using the configuration tool(with INT19 enabled). Then I ran the following commands: set filename=OPTROM.AT.2.BIN plpbtrom -INT18 plpbtrom.bin %filename% Then simply copy the generated OPTROM.AT.2.BIN file to the ROM …

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Combining plop BIOS ROM with xt-ide universal bios?

Posted on 2019-05-26, 11:47

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by superfury

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Is it possible to combine those two ROMs in one emulated system? Every time I try to use them together(in either mounting order), only one of them works, or the BIOS flat out refuses to use one of them(due to INT19h hooking issues)?

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x86 #SS vs #GP for all different SS loads?

Posted on 2019-05-26, 02:22

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by superfury

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What happens when a SS segment register faults during any of the following operations: - Task switching - MOV SS instruction - LSS instruction - Privilege level changes(e.g. during interrupts/call gates) I currently have it implemented to always fault as #SS(selector), except for invalid types to …

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Re: Any good MS-DOS 80386/80486 games for testing Virtual memory support?

Posted on 2019-05-25, 21:20

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by superfury

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Anyone knows what might cause the Compaq Deskpro 386 BIOS to become very slow during it's memory check of 99XX through 12000KB? I have 12MB of RAM installed(of which ~380K is made into a ROM(actually write-protected RAM) by the BIOS) in UniPCemu. The RAM between 640K-1M and any between 15M-16M and …

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Re: UniPCemu cycle accurate 8088 implementation

Posted on 2019-05-24, 18:04

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by superfury

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Just noticed something interesting after fixing the REP prefix. Now that the instructions that are used with it actually execute(instead of the second byte/word/dword onwards essentially transferring nothing and have no execution instruction phase while still counting 1 cycle each on the BIU), …

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Re: UniPCemu cycle accurate 8088 implementation

Posted on 2019-05-24, 13:58

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by superfury

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Is the REP prefix used in the 8088 MPH credits? I just found a bug causing REP instructions that went past their first iteration of the instruction(and decreasing CX because the instruction was finished) caused all other instructions to effectively become NOP instructions with 1-cycle timings :S …

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Re: Any good MS-DOS 80386/80486 games for testing Virtual memory support?

Posted on 2019-05-24, 11:37

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by superfury

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Just tried logging the 160 code segment instead of the whole thing. Then I, looking upwards from the invalid (L)IDT base being loaded, I arrive at some "0160:fff8c95b (F3A5)REP MOVSD" instruction, that's seemingly moving a block of memory? That instruction seems to overwrite said memory, writing …

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