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Re: Hayes compatible modem emulation issues?

Posted on 2020-10-04, 20:01

OK. I notice something after cancelling the script that's running. It will hang up. So far so good. Then it sends "AT", without any carriage return following it, causing the next dial's AT command to append AT to the dial string, followed by carriage return? So it will execute the command "ATAT", …

Re: Hayes compatible modem emulation issues?

Posted on 2020-10-04, 16:36

by superfury

in PC Emulation

Just adjusted the UART emulation a bit. When it receives a Interrupt Enable Register with bit 1 set(value 02h), when both the transmitter holding and transmitter shift registers are empty and not sending anything to the peripheral, it will trigger a transmitter holding register empty interrupt. This …

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium (/Pro/II)(no FPU) games for testing IA-32 emulation?

Posted on 2020-10-04, 11:50

by superfury

in PC Emulation

Anyone knows more complete-ish CPU testing software like CheckIt? All the tools on Jiren's BootCD 7.8 pass diagnostics, as does CheckIt 3 for DOS and CheckIt 4 on Windows(the DOS bootdisk version gives a divide by zero error).

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium (/Pro/II)(no FPU) games for testing IA-32 emulation?

Posted on 2020-10-02, 20:45

by superfury

in PC Emulation

Hmmm... What's causing Sandra 95 to crash on MFC42.dll at 0137:5F404FFC is reported as a Page fault("caused an invalid page fault in" in the error message), but is actually caused by a general protection fault instead? The dll is trying to access address 0xB6 incorrectly for a CALL(GRP5 /2) …

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium (/Pro/II)(no FPU) games for testing IA-32 emulation?

Posted on 2020-10-02, 08:08

by superfury

in PC Emulation

OK. With the latest bugfixes and a repair install of Windows 95 C(OSR 2.5), WinEject no longer crashes! 😁

Re: PS/2 mouse on IBM PS/2 models 25-8086 and 30-8086

Posted on 2020-10-01, 11:12

by superfury

in PC Emulation

Apparently it's sharing IRQ1? http://www.vcfed.org/forum/archive/index.php/t-34880.html

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Posted on 2020-09-28, 06:37

by superfury

in PC Emulation

Having fixed the bugs up until now, it looks like WinEject is running better now. The settings can now finally be opened. But, when trying to open the CD's individual drive open/close submenu in the taskbar icon, it will crash the program? Also, one of the SCSI_502.pdr (hard disk/CD-ROM driver) …

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Posted on 2020-09-27, 19:03

by superfury

in PC Emulation

After adding and implementing the Pentium Pro's PAE extensions, I noticed that the paging TLB caching algorithm in UniPCemu had a bug. It was giving the most recent result instead of the valid flag(to indicate if the TLB lookup succeeded) and not filling the resulting address at all. So the TLB …

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Posted on 2020-09-24, 09:22

by superfury

in PC Emulation

Just implemented the Pentium-specific MSRs and their write-only(newly supported) and read-only bit definitions.

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Posted on 2020-09-23, 14:52

by superfury

in PC Emulation

Just added missing stereo sample support to the Soundfont synth. It should now be able to render the stereo samples, if they're present in the soundfont. Although that means that some things get double as heavy to process now, mainly everything in the sample retrieval/looping of the samples and the …

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Posted on 2020-09-22, 19:13

by superfury

in PC Emulation

OK. I've noticed something interesting: - Windows 95 boots without issues until Pentium II (so on all emulated CPUs). - Windows 95 reports Pentium Pro as Pentium Pro, but reports Pentium II as Pentium Pro? - Windows 98 crashes on VPICD.VXD for Pentium Pro and Pentium II, but not crashing at all on …

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Posted on 2020-09-22, 14:23

by superfury

in PC Emulation

Just upgraded the CPU emulation a bit again. Now it supports the i786 instruction set(in other words, the SYSENTER and SYSEXIT instructions) on a newly implemented Pentium II (although it, like the Pentium and Pentium Pro, doesn't have a FPU). So those other two new instructions(FXSAVE and FXRSTOR) …

Re: ATAPI start/stop unit command with LoEj=0 purpose?

Posted on 2020-09-20, 18:44

by superfury

in PC Emulation

So, as I've now implemented it: - The start/stop unit command only is blocked by the prevent/allow medium removal bit. - The button on the CD-ROM drive does one of the following things: -- When unlocked and tray inserted, ejects the tray. -- When locked and tray inserted, set the MCR bit read when …

Re: ATAPI start/stop unit command with LoEj=0 purpose?

Posted on 2020-09-20, 12:52

by superfury

in PC Emulation

I've just been thinking... Is the MCR bit also set and no action taken when the user wants to insert a disc into the opened tray? So when the tray is open and a disc is present or not, what does the eject button do? Will the drive retract the caddy itself without notifying the OS and letting it …

Re: ATAPI start/stop unit command with LoEj=0 purpose?

Posted on 2020-09-20, 10:59

by superfury

in PC Emulation

Hmmm... What happens if the software requests a loEj=1,start=1 command while the prevent/allow is disabled and the removable media status notification is enabled? Does the removable media status notification count as a prevent, preventing the loEj=1,start=x from loading/ejecting the tray? Or does it …

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Posted on 2020-09-20, 05:57

by superfury

in PC Emulation

Just fired up Windows 95 OSR 2.5 "C". It seems to properly enable the Removable Media Status Notification protocol now! :D I've also improved the CPU emulation to now support a Pentium Pro(i686) as well. It's the same as the Pentium without FPU, but with the non-FPU Pentium Pro opcodes implemented …

Re: Sound high-pass filter vs peaks?

Posted on 2020-09-20, 04:00

by superfury

in PC Emulation

OK. I had to implement channel-specific high-pass filters instead. The MIDI renderer can't use it due to sound becoming too soft. But the other sound channel actually can generate DC voltage, which causes the rendering system to try and output that to SDL. And if the rendering system isn't running …

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Posted on 2020-09-19, 13:46

by superfury

in PC Emulation

Managed to implement the two LFO signals into the MIDI synth. Now all that's theoretically missing is just the initialFilterQ setting (on the generator/modulator part), which isn't emulated(and probably can't, since it's a basic RC filter)? And of couse stereo samples are still ignored(it just plays …

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Posted on 2020-09-18, 13:50

by superfury

in PC Emulation

Managed to fix the volume as well (unrequired high-pass filter of 18.2Hz(RC filter)). Now the invalid volume overflows shouldn't occur anymore. It's still very loud, though?

Re: Sound high-pass filter vs peaks?

Posted on 2020-09-17, 14:40

by superfury

in PC Emulation

After disabling the high-pass filter and only leaving the required low-pass nyquist filter(required for resampling) in place, the sound no longer seems to clip? I've also changed the volume reduction to no longer happen(multiplying by 1.0, thus not changing volume). Although the sound (at least as …

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Re: Hayes compatible modem emulation issues?

Re: Hayes compatible modem emulation issues?

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium (/Pro/II)(no FPU) games for testing IA-32 emulation?

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium (/Pro/II)(no FPU) games for testing IA-32 emulation?

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium (/Pro/II)(no FPU) games for testing IA-32 emulation?

Re: PS/2 mouse on IBM PS/2 models 25-8086 and 30-8086

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Re: ATAPI start/stop unit command with LoEj=0 purpose?

Re: ATAPI start/stop unit command with LoEj=0 purpose?

Re: ATAPI start/stop unit command with LoEj=0 purpose?

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Re: Sound high-pass filter vs peaks?

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium(no FPU) games for testing IA-32 emulation?

Re: Sound high-pass filter vs peaks?