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Re: VIA AC'97 Sound Blaster drivers for MS-DOS?

Posted on 2019-11-27, 04:28

From a technical perspective, I remember VIA 686B southbridge supports special logics for trapping legacy SoundBlaster compatible I/O, so the driver actually uses that to emulate SBPro compatibility in DOS with AC97 audio. This was something that Intel had never bothered to support, but …

Re: DOS 7.1 Boot and Memory Problems

Posted on 2019-11-21, 07:20

Proving the concept with EMM286, 629KB free conventional memory, 2048KB EMS 4.0 memory and EMS page frame in UMB. Modules using memory below 1 MB: Name Total Conventional Upper Memory -------- ---------------- ---------------- ---------------- SYSTEM 18,704 (18K) 10,688 (10K) 8,016 (8K) HIMEM 1,120 …

Re: DOS 7.1 Boot and Memory Problems

Posted on 2019-11-20, 18:43

No EMS with umbpci. There is an option for software-based EMS (LIMulator, EMS simulator etc.) if you leave enough free UMB block to fit the 64KB EMS page frame. Most of them are meant to be used with 80286 and if loaded in UMB, the EMS page frame stays in UMB, too. Most games requirement of EMS …

Re: DOS/4GW and DOSBox XMS/EMS Settings

Posted on 2019-11-20, 04:58

Red_88 wrote: The game runs with dosbox settings XMS=false, EMS=false. Question is if it is recommend doing it this way or should I change my settings. If you are using DOSBox, then you do not have to tinker with the settings for XMS or EMS for DOS4G/W games. The defaults work very well.

Re: DOS 7.1 Boot and Memory Problems

Posted on 2019-11-20, 02:44

HIRAM has its source code released HIRAM19A.ASM. :D I added the same chipset code for enabling UMB and had HIMEM.SYS loaded in UMB. This freed up additional 1120 bytes and made 629KB of free conventional memory. There is nothing else to free. You've got 631KB and I wonder where else to shrink 2KB of …

Re: DOS 6 22 vs DOS 7.1

Posted on 2019-11-18, 20:34

Lazar81 wrote: What is UMM03? Similar to UMBPCI, but it is open-sourced and public domain. I added chipset codes to enable upper memory regions. It only has 64 bytes base memory footprint and CPU remains in real-mode.

Re: Benchmarking DOSBox on latest machines

Posted on 2019-11-11, 17:59

in PC Emulation
1. Can DOSBox and say the fastest domestic PC currently available, emulate the most demanding DOS game (whatever that is) at full speed? With all of the games options, such as draw distance and screen resolution, set to best/max? And would the same be true for the most demanding DOS non-game, such …

Re: Benchmarking DOSBox on latest machines

Posted on 2019-11-11, 00:06

in PC Emulation
But Dhrystone benchmark run in any virtual machine [QEmu (HAXM) or virtual pc or vmware player or virtualbox] with DOS outperforms Dhrystone benchmark run on the same PC booted to real DOS :) Guest outperforms host :) In theory, this is not possible. It is possible that virtual machines can play …

Re: Benchmarking DOSBox on latest machines

Posted on 2019-11-10, 23:43

in PC Emulation
I would personally consider a true native DOS machine with decent sound hardware support for games ends with Intel 440BX platform and the best supported Intel CPU. Anything beyond that are simply half-hearted hacks and patches for extending the machine's DOS usability by check mark, while some …

Re: Napalm Glide3x WIN64 DLL

Posted on 2019-11-04, 22:52

The Napalm Glide3x seems to have issue with textures. I suspect that this is due to TEXFMT and PIXEXT but I haven't tried out the experiment of filtering out these 2 on Napalm built to see if that works. For the regular Glide3x, I would like to suggest that it should be reporting "Voodoo3" for " …

Re: Glide 2.1.1 games and Voodoo 2

Posted on 2019-11-04, 05:05

in Windows
I think you're right. I seem to recall similar conclusion tracing glide.dll/sst1init.dll that it only search for PCI device on Bus 0 only. Not surprising since the era of 1st Voodoo, all chipsets in consumer's space had Bus 0 for PCI, and PCI bus was the same bus that connected North and South …

Re: Napalm Glide3x WIN64 DLL

Posted on 2019-11-03, 03:15

Using the build from WIP66, the Napalm build has rendering issues even when not opting for Napalm extensions by selecting "voodoo_2" in the configuration. I have prints that confirmed only voodoo_2 supported extensions were reported, but the sky rendering in Quake3 was messed up with 3Dfx OpenGL …

Re: Glide 2.1.1 games and Voodoo 2

Posted on 2019-11-02, 02:27

in Windows
So majority of them eventually got updates to Glide2x. Excluding non-playable demo, only 4 really require Glide 2.1.1. Cybergladiators Mechwarriors 2: 31st Century Combat Pandemonium! Scorched Planet QEMU Glide pass-through supports unique Glide2.1.1 -> Glide2x conversion. Mech2 and Pandy1 were …

Re: Napalm Glide3x WIN64 DLL

Posted on 2019-11-01, 19:15

This is the code snippet from MESA 6.2.1 showing the expected GR_HARDWARE string mapping to the hardware. extension = grGetString(GR_HARDWARE); if (strstr(extension, "Rush")) { config->SSTs[i].type = GR_SSTTYPE_SST96; } else if (strstr(extension, "Voodoo2")) { config->SSTs[i].type = GR_SSTTYPE_ …

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