Re: Best way to make my x86EMU 8086/8088 calculate CPU instruction cycles?
Posted on 2016-01-22, 23:24
This is what I use for my emulator: http://ece425web.groups.et.byu.net/stable/lab … tructionSet.pdf
Re: John Romero releases new Doom .wad
Posted on 2016-01-16, 22:04
I tried in original Doom and it does not work for me. It hangs after saying loading e1m8b.wad. I tried this on 3 machine: 386DX40, Pentium II @ 400 and finally in DosBox on a very powerful Core i7 4790. UPDATE: Zdoom tells me this: "You cannot -file with the shareware version. Register!". Maybe that …
Re: Any software out there who can mount formatted .img files?
Posted on 2016-01-16, 20:32
I use Winimage 9.0 to mount a 40Mb HDD image. It might not work with too large images though.
Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX
Posted on 2016-01-16, 12:59
How come they get same (or very similar rather) results in 3DBench and Wolf3D given that one is at 40Mhz and the other at 25Mhz? Also one has a 32bit bus the other has a 16bit bus? I am a bit confused. Regards, Vlad.
Re: Goldeneye 007 in Unreal Engine 4
Posted on 2016-01-15, 14:52
Haha, I just realized that if what you say is true then Golden Eye might the ONLY game whose IP is owned by the 3 manufacturers of consoles: Microsoft (by owning Rare) Nintendo Sony (by owning MGM)
Re: Any software out there who can mount formatted .img files?
Posted on 2016-01-15, 13:00
Also for new Windows, I use WinImage 9.0 (6.0 works in 9x Windows). it works very well for me.
Re: What machines did you use in High School?
Posted on 2016-01-10, 03:56
We used HC-85 which is an Eastern European (Romanian) clone of ZX Spectrum. Home, I had a 386 SX 20Mhz though 😀
Re: x86 MUL and IMUL flags affected?
Posted on 2016-01-08, 22:54
To complicate matters more I think I've seen PCEm only updating the Zflag based on the lower 16bit register (AX). So for 16bit multiply where the result would be in DX:AX it only checks the AX to set the flag. I think fake8086 does that too. That expands to 32bit multiply where they only look at …
Re: [retro swim] - An episodic video tour of SquallStrife's retro junk
Posted on 2016-01-07, 23:47
I like this series a lot! Thanks for putting the videos up!
Re: x86EMU emulator releases
Posted on 2016-01-06, 21:23
So what's the goal of this project? What does this do that, say, PCem doesn't do? Just because PCem exists and it is a very good product does not mean that all emulator work should stop. Just because it does not do something on top of PCem does not mean it does not have a goal. The point is, it is …
Re: Whay does the VGA BIOS do when it's started by the PC BIOS?
Posted on 2015-12-28, 13:29
superfury wrote: Isn't Plex86 built for 286/386+ processors? So it won't run on my 80(1)86 emulation. Ugh, I am sorry, you are right. I am not 100% sure if it uses any 286/386 stuff though, I will need to look.
Re: 8086 mov cs,ax instruction?
Posted on 2015-12-28, 01:03
Also, this is what PCEM does as well: it actually does load CS. There is a comment in there saying "8088/8086 only" but I do not see that enforced in the code.
Re: 8086 mov cs,ax instruction?
Posted on 2015-12-28, 00:57
Interesting question. My emulator blurts out an assert in assert builds in just goes to next opcode in release builds. But according to http://www.os2museum.com/wp/undocumented-8086-opcodes/ and http://textfiles.com/programming/86bugs.lst we have this: On the 86 and 88, but not on the C-MOS versions …
Re: Whay does the VGA BIOS do when it's started by the PC BIOS?
Posted on 2015-12-28, 00:31
I assume also default palette setup (for VGA and CGA-on-VGA emulation) and maybe set up default font bank? I also use the Plex86 VGA emulation on my emulator and that one comes with (commented sources). See: http://www.nongnu.org/vgabios
Re: x86EMU VGA(interrupt 10h) emulation crashes Turbo XT BIOS v2.5?
Posted on 2015-12-24, 17:53
Is it possible it is reading 3BA/3DA port outside INT10h and therefore it does not detect bit changes so it goes on an infinite loop? Is TURBO XT BIOS only interacting with the card via INT 10h calls? Regards, Vlad.
Re: Commodore 64 + 1541
Posted on 2015-12-22, 20:56
First thing you could do, is chose a disk you don't mind losing the contents from and try to format it. Then read it back. If the disk does not format it is possible there is an issue with the drive. If the disk formats but not read it is even more likely this is an issue with the drive. If both …
Re: Tube amp on a motherboard...
Posted on 2015-12-21, 15:28
I would grab one now if I could. In 10 or so years this will become a collectable item. For multiple reasons 1) AOpen are not going to make too many of them (and some will break) 2) It is unique, it combines 2 pieces of technology from 2 different eras (and it works!) 3) by then tube stuff will be …
Folder sharing with host
Posted on 2015-12-19, 19:08
Hi, I am trying to add host folder sharing to my emulator CAPE . Since I am emulating the machine not DOS, the way I thought I can approach this is to intercept INT 21h calls that DOS makes and if I see say "X:\" I can take over and instead of letting DOS dealing with listing files, opening/closing …
Re: Recapping gear!
Posted on 2015-12-17, 23:56
I use a Hakko FX-888D as my soldering station. It is programable in temperature and can hit the top temperature in 30s. I highly recommend it.
Re: Anyone use an old linux OS on an old PC?
Posted on 2015-12-16, 01:43
Last year I've installed (and used for quite a while) Slackware 4.0 (with my own kernel compile) on my 386DX 40Mhz. No X just console but it ran fine (albeit a bit slow). I used it for example as a server for my MUD and various other programming stuff (like my chess engine) I was doing. Personally …
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