Re: VIA 686B AC'97 audio works really well in DOS (SB Pro stereo + OPL3 emulation!)

Posted on 2022-04-15, 12:29

by

by javispedro1

in Marvin \ Sound

in Marvin \ Sound

I was wondering, would you be willing to record this track thru 686B? https://www.mediafire.com/file/r2y18devw6668jb/cotex1.mp3/file Sorry... what? I am utterly confused, that is an mp3... This thread is about FM synthesis (or rather the software emulation of FM synthesis in these VIA chipsets). We …

---

Re: VMusic - OPL3, EMU8K and MPU-401 for VirtualBox (Linux hosts only)

Posted on 2022-04-13, 22:32

by

by javispedro1

in Release Announcements

in Release Announcements

Glad to hear! Let me know if it works. I had a chat in the VirtualBox forums regarding opening the door for Extension Packs like this one for Windows hosts, and they'd say they'd look into it , but no promises. In the meanwhile I use it in all my VMs, but I don't really have a lot of games either, …

---

Re: What retro activity did you get up to today?

Posted on 2022-04-06, 02:50

by

by javispedro1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That's great! Can you be tempted to add VMware integration as well? Done https://user-images.githubusercontent.com/123961/161877878-78863d5b-8dc0-4f14-89de-e21b3cca99ea.mp4, may open a new thread for it later this weekend. Compatibility is rather to be abysmal but at least it works with a couple …

---

Re: DOS Build with no external drives (CD, floppy)?

Posted on 2022-04-05, 15:34

by

by javispedro1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You can also partition and install DOS on another machine (or a VM/PCem) then copy the image to the CF. DOS does not really care when moving between different hardware, other than maybe CHS settings. (If the target machine is really old then PCem may be mandatory, to ensure similar CHS when …

---

Re: What retro activity did you get up to today?

Posted on 2022-04-04, 02:10

by

by javispedro1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Spent a sunday afternoon writing Yet Another DOS Int33 Mouse Driver. I wrote it in C because why not and because I guess there's no other open source mouse driver in C. Being in C it is more suited for a modern/virtualized PC so I added VirtualBox integration to it. https://user-images. …

---

Re: Freedos 1.3

Posted on 2022-04-04, 01:51

by

by javispedro1

in Milliways

in Milliways

By the way, here's some video that shows how even that CDU DOS outperforms FreeDOS in terms of modern hardware compatibility.. https://www.youtube.com/watch?v=9si1le2EOGU&t=300 I'll note that later on he reveals his USB pendrive was flaky.... which kinda explains why would FreeDOS (and WinME) hang …

---

Re: BeOS

Posted on 2022-04-04, 01:38

by

by javispedro1

in Milliways

in Milliways

Haiku is more heavyweight that the original BeOS, it does things than the original could only dream (like scalable vector UI: fonts, icons, etc.) . For a "modern" computer that's not really a problem (and Haiku is really lightweight compared to alternatives) but may be too heavy for computers of the …

---

Re: BeOS

Posted on 2022-04-01, 12:11

by

by javispedro1

in Milliways

in Milliways

I also used BeOS (on a PC) a lot during the 2000-2001s , I got tired of 9x crashes and my only license of WinNT was the Win2k Beta something that was a freebie from some computer magazine (which I also had installed as a dualboot, but did not use much). I remember I even bought GobeProductive at …

---

Re: Who cares about ebay prices when you can do this!

Posted on 2022-03-31, 15:28

by

by javispedro1

in Milliways

in Milliways

But will it simulate the software side ? And by that I mean will it blue screen from time to time due to crappy drivers ?

---

Re: PowerVR Fun Thread

Posted on 2022-03-31, 13:32

by

by javispedro1

in Marvin \ Video

in Marvin \ Video

libv wrote on 2022-03-30, 15:10: Seems like you were at nokia before the N900 was being worked on. (For the record I was never at Nokia, just one of these annoying "community" guys. Good times.)

---

Re: PowerVR Fun Thread

Posted on 2022-03-30, 11:35

by

by javispedro1

in Marvin \ Video

in Marvin \ Video

If you hear or heard anyone state, in the last decade, that powervr SGX code is horrible and the hw is not worth reverse engineering, they have been repeating my statements and insights into that topic. You are not the only one ;) In 2008ish , there was some effort at Nokia/TI/IMG to get some …

---

Re: People underestimate hardware they have and it's annoying

Posted on 2022-03-29, 22:11

by

by javispedro1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

SSE and AVX are ridiculous ISA extensions. [....] ARM and Risc-V took a completely different approach with their vector ISAs, SVE and RiscV-V. I think this is a bit harsh. ARM has plenty of ridiculous ISA extensions. I played with the old Jazelle DBX (the one that runs java opcodes natively). I …

---

Re: Win32 games having DOS engine components

Posted on 2022-03-28, 16:33

by

by javispedro1

in Windows

in Windows

Not entirely related, but also a lot of Win32 applications shipped with a win16 setup.exe . There's a specific hack so that those can still be installed in 64-bit Windows : https://devblogs.microsoft.com/oldnewthing/20 … 1031-00/?p=2783

---

Re: Erratic Mouse movement in a DOS shell under WinFWW 3.11

Posted on 2022-03-28, 13:00

by

by javispedro1

in Marvin \ Software

in Marvin \ Software

What a coincidence! I hit this issue a couple weeks ago https://github.com/NattyNarwhal/vmwmouse/issues/2#issuecomment-1065929496 What happens is that the MS Mouse driver 9.x series ship with their own special Windows 3.x protected mode driver (called MOUSEVKD.386 ). You have to use it, otherwise …

---

Re: how to use DOS Int 21h + 4Bh for executing a sub program?

Posted on 2022-03-26, 11:57

by

by javispedro1

in Marvin \ Software

in Marvin \ Software

i though exe program do not allocate the complete free ram like com programs - am im wrong - can find any references But only if the .exe does not request all the memory, and many linkers set it to request all the memory . See the value of the "Maximum allocation" in your .exe ( https://wiki.osdev. …

---

Re: People underestimate hardware they have and it's annoying

Posted on 2022-03-25, 10:50

by

by javispedro1

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I think you're way too biased by old hardware. Go take an Ivy Bridge computer, not upgraded in any way, and put Windows 10 on it, since 7 is muerto for updates and 8.1's demise is right around the corner. It's not pretty without at least an SSD upgrade. That 10 year old hardware won't take you very …

---

Re: PowerVR Fun Thread

Posted on 2022-03-23, 15:33

by

by javispedro1

in Marvin \ Video

in Marvin \ Video

Interesting. Seems to include sources for the D3D/DDraw driver under MIT license. I don't remember if there was a sample driver available for this. Not sure which pieces are missing, though. Can't find the Win9x VXD.

---

Re: Issues running VirtualBox & Win98

Posted on 2022-03-23, 14:16

by

by javispedro1

in PC Emulation

in PC Emulation

No surprise, Windows 98 is a supported guest OS on VirtualBox. Sorry what do you mean "permissions crap " ? On the guest -- Windows 98 ? Or is it a VirtualBox error ? The USB 1.1 controller should be recognized by Win98's builtin OHCI driver, no drivers required.

---

Re: Accessing the parallel port registers - DOSBox-X

Posted on 2022-03-23, 14:01

by

by javispedro1

in DOSBox General

in DOSBox General

I am not sure if you can configure DOSBox-X to forward I/O access to real IO ports. However, it is likely trivial to implement, specially if you already know C. I see they tried to do that already for Adlib passthrough and for LPT passthrough in Windows (but it is all commented out). Under Linux, …

---

Re: Dual-booting DOS 6.22 FAT32 & Win98SE FAT32 On Same HDD?

Posted on 2022-03-22, 23:25

by

by javispedro1

in Marvin \ Software

in Marvin \ Software

If you are already using a boot manager (say grub4dos) you don't have to install Windows on "letter" D: (which is another compatibility nightmare) , and you don't need to have only one visible primary partition. Just boot from the desired partition's boot record. As far as I can see, on win9x the …

---