Re: DOSBox-X branch

Posted on 2022-06-05, 18:42

by

by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

Read the recent commit on the BOUND instruction. Searched further and noted a post on its implementation. Seems there is a distinct 80188 cpu type. "Technically, x86 does have hardware bounds-checking: the BOUND instruction was introduced in 1982 in the Intel 80188 (as well as the Intel 286 and …

---

Re: Any interest in a SDL-less "abstract" port?

Posted on 2022-02-28, 16:30

by

by hail-to-the-ryzen

in DOSBox Development

in DOSBox Development

https://github.com/libsdl-org/sdl12-compat From the readme: This code is a compatibility layer; it provides a binary and source compatible API for programs written against SDL 1.2, but it uses SDL 2.0 behind the scenes.

---

Re: DOSBox-X branch

Posted on 2022-02-27, 18:53

by

by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

The s3virge.inf shows this in a S3 Virge Windows driver set, but the other Virge variants are similar (the following may possibly constrain the Windows color depth options): HKR,"MODES\4\640,480",drv,,vga.drv HKR,"MODES\4\640,480",vdd,,*vdd HKR,"MODES\4\800,600",drv,,vga.drv HKR,"MODES\4\800,600", …

---

Re: Calculatory inconsistency between DOSBOX/Win and DOSBOX/x86 Linux/ARM

Posted on 2021-11-11, 11:11

by

by hail-to-the-ryzen

in DOSBox Development

in DOSBox Development

In the transcendental test, a 1993 version of MCPDIAG seems to make comparisons between values of PI under two different rounding modes. It loads a log value first from the fpu and then loads these values of PI for the comparison. The fpu status word is compared to a value in memory. The program has …

---

Re: 32-bit Application redirection to DOSBox

Posted on 2021-11-10, 12:09

by

by hail-to-the-ryzen

in DOSBox General

in DOSBox General

It is not recommended, but it is possible to install Windows 95 as a guest OS. Another option is to test in Windows 3.1 while in 32-bit mode, but that is not likely to work.

---

Re: 32-bit Application redirection to DOSBox

Posted on 2021-11-10, 11:02

by

by hail-to-the-ryzen

in DOSBox General

in DOSBox General

I read your discussion at another web site: https://sourceforge.net/p/dxwnd/discussion/general/thread/98dd46dfc6/?limit=25 Running RUN386.EXE QUEEN.EXE at a command prompt works and outputs text of chessboard positions. Apparently, PCHESS calls these DOS executables, but I am not aware of a simple …

---

Re: Calculatory inconsistency between DOSBOX/Win and DOSBOX/x86 Linux/ARM

Posted on 2021-11-10, 10:20

by

by hail-to-the-ryzen

in DOSBox Development

in DOSBox Development

A later version of MCPDIAG at this (not secure) web site: http://annex.retroarchive.org/cdrom/pier-01/017A/index.html It runs on 32-bit Windows and fails on my host system at the same transcendental test. It is an Intel Core2Duo. It also has another set of tests, but they do not seem useful for the …

---

Re: Calculatory inconsistency between DOSBOX/Win and DOSBOX/x86 Linux/ARM

Posted on 2021-11-09, 17:40

by

by hail-to-the-ryzen

in DOSBox Development

in DOSBox Development

There may be hints on the 387dx test at this site: https://dougx.net/gaming/coproc.html#compatability

---

Re: DOSBox-X branch

Posted on 2021-11-01, 00:40

by

by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

There is an interesting list of differences between the 8086 and 386 cpu: https://pdos.csail.mit.edu/6.828/2008/readings/i386/s14_07.htm Examples: "The 80386 can generate the largest negative number as a quotient for the IDIV instruction. The 8086/8088 causes exception zero instead." "The setting of …

---

Re: DOSBox-X branch

Posted on 2021-10-31, 06:07

by

by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

I think so. Given the commit is reversed and the cpu=8086, then it seems reasonable to return to the following instruction for now. I would verify that the registers in idiv are handled correctly, too. I think any change should be attached to 8086, until more is known of the other cpu types. This …

---

Re: DOSBox-X branch

Posted on 2021-10-31, 02:55

by

by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

There is a recent commit to dosbox-x for "allowing borderline quotient values in IDIV": https://github.com/joncampbell123/dosbox-x/pull/3014 The above commit is a partial reversion to dosbox svn commit r2175, a change to the idiv instruction and related code. It may be worth testing whether any …

---

Re: WinHexen/WinHeretic

Posted on 2021-10-04, 02:44

by

by hail-to-the-ryzen

in Windows

in Windows

Can test compatibility of this port with hexen and heretic: https://github.com/drfrag666/ZDoom-CL/releases I believe that uses directdraw version 3. The PCX1 is probably a dx3-compatible video card.

---

Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2021-09-30, 12:04

by

by hail-to-the-ryzen

in Release Announcements

in Release Announcements

Thanks for the helpful instructions. A custom map set with less detail, like WolfenDoom, may also compress well to the lower resolution mode.

---

Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2021-09-30, 07:31

by

by hail-to-the-ryzen

in Release Announcements

in Release Announcements

I wonder whether a script, perhaps with the help of ImageMagick, could convert the textures to a scheme that conforms to the above CGA mode.

---

Re: Armored Fist 2 ctd in dosbox

Posted on 2021-09-15, 05:03

by

by hail-to-the-ryzen

in DOSBox Games/Apps

in DOSBox Games/Apps

As a test of last resort for the use of the dynamic x86 core, it is possible to change a cache block setting from 32 to another value. I have not tested it, but a value of 16 may work. Here is one of the locations of the setting in core_dyn_x86.cpp: block=CreateCacheBlock(chandler,ip_point,32) If …

---

Re: Unreal vs Unreal Gold (UT engine) Performance

Posted on 2021-08-01, 06:43

by

by hail-to-the-ryzen

in Marvin \ Software

in Marvin \ Software

Unreal itself however has had many, many rendering changes throughout the history of patches, including GlideDrv. I believe it was around 226 that they synced the renderers with UT 420 In Unreal version 226, including 224v, there is the non-mmx software renderer lighting bug as seen in UT 400 and …

---

Re: Clive Barker's Undying is unplayable due to stuttering

Posted on 2021-07-13, 20:40

by

by hail-to-the-ryzen

in Windows

in Windows

Is it just the family of unreal engine games? It is possible to test with alternate sound settings, such as for UT99: [Galaxy.GalaxyAudioSubsystem] UseDirectSound=False UseFilter=False UseSurround=False UseStereo=True UseCDMusic=False UseDigitalMusic=False UseSpatial=False UseReverb=False …

---

Re: System requirements O2EM or MESS for dos?

Posted on 2021-07-13, 04:50

by

by hail-to-the-ryzen

in DOS

in DOS

A Pentium 1 should work for 1.16. It is also possible a fast 486 will run it, too. I believe mess is based on o2em and o2em is recommended.

---

Re: DOSBox ECE (for Windows & Linux)

Posted on 2021-06-10, 07:13

by

by hail-to-the-ryzen

in DOSBox Development

in DOSBox Development

The enthusiasm about the different dosbox forks reminds me of 3dfx voodoo code I have. It may work on the ECE port in addition to all the forks listed above. I think I still have the code, if so I can try to post it.

---

Re: Fastest emulators period

Posted on 2021-06-06, 07:45

by

by hail-to-the-ryzen

in Console & Arcade Emulation

in Console & Arcade Emulation

Gameboy: NO$GB (req 386DX33) Megadrive: KGEN98 (req 486DX4100) NES: LoopyNES (req 486DX266) / NESticle (req 486SX40) SNES: ZSNES (req 486DX4100 for some games, PentiumMMX 150 for most) Further tested the above in a 486 environment, except for the Gameboy. The NES emulator NESticle seems the best by …

---