Search found 76 matches

by Zup
Sun 26 Jul, 2020 7:29 am
Forum: Development
Topic: documentation rework
Replies: 12
Views: 1246

Re: documentation rework

The is no problem to include the MD5/SHA1, the thing is that there is not just ONE valid file. There are many versions of a same ROM and all should work Should != will. The thing is that PCem programmers check their changes with a set of ROMs. Other ROMs for the same system may be untested and may ...
by Zup
Fri 24 Jul, 2020 2:24 pm
Forum: General
Topic: PCem USB support
Replies: 15
Views: 1848

Re: PCem USB support

Maybe it could be interesting to create "virtual" USB HID or MSD devices. Something like getting keyboard/mouse/joystick input and feed it into that virtual HID device. It would be a way to overcome the axis/buttons limitations of traditional gameport. MSD devices could be emulated using a disk imag...
by Zup
Thu 09 Jul, 2020 2:19 pm
Forum: General
Topic: How to install PCem v16 on Linux
Replies: 24
Views: 2466

Re: How to install PCem v16 on Linux

It's complaining about some opengl development package, so you'll need something like libgl-dev. In Debian, it's a virtual package (provided by libgl1-mesa-dev).
by Zup
Wed 01 Jul, 2020 7:09 am
Forum: General
Topic: Speed timings for emulated hard disks
Replies: 11
Views: 5407

Re: Speed timings for emulated hard disks

Although there were 15000 rpm SCSI disks, I don't think they would be available at Pentium II era. Also, to match speeds settings you'll have to include some of this parameters: - Interleave (very important for MFM and RLL disks). - How many ms takes the head motor to jump from a track to the next. ...
by Zup
Mon 04 May, 2020 5:37 am
Forum: General
Topic: No sound with any OS after buying New PC
Replies: 2
Views: 723

Re: No sound with any OS after buying New PC

Windows 10 lets you choose volume settings on a per-applications basis. That affects to volume and audio output (i.e.: choosing between internal audio, a PCI souncard or an HDMI output).

So... do you have the right audio output selected with enough volume?
by Zup
Sun 26 Apr, 2020 7:37 am
Forum: General
Topic: Question about copy protection in dos games
Replies: 13
Views: 2123

Re: Question about copy protection in dos games

Interesting story: I bought one of the Forgotten Realms releases on cd. There were 12 games which came with a book I still have. The book was apparently the manual for all the games. After playing one level of one game, the copy protection kicked in and asked me for a certain word on a certain page...
by Zup
Sat 25 Apr, 2020 7:09 am
Forum: General
Topic: Question about copy protection in dos games
Replies: 13
Views: 2123

Re: Question about copy protection in dos games

1) It is what it says. Measures to prevent users from copying games instead of buying.

2) https://www.google.com (or https://duckduckgo.com if you're concerned about privacy).
by Zup
Sun 01 Mar, 2020 9:18 am
Forum: General
Topic: Old Mac OSs on PCEM?
Replies: 7
Views: 2737

Re: Old Mac OSs on PCEM?

AFAIK, MacOS 9 runs on Power PC CPUs and earlier releases on 68000 series. Nothing related to 80x86 CPUs/architecture (except some Macintosh that had a PDS card, like Power Macintosh 6100... but still far away from PCs). The only Macintosh that resembles PC architecture are modern ones, and that CPU...
by Zup
Fri 24 Jan, 2020 3:57 pm
Forum: General
Topic: Autodesk 3DS R4 “SentinelPro must be plugged into parallel port”
Replies: 3
Views: 1169

Re: Autodesk 3DS R4 “SentinelPro must be plugged into parallel port”

Some (more than ten) years ago I used an unofficial DOSBox version patched with LPT passthrough to run a DOS program that needed a dongle. Also, I guess there must be some virtual machines that support LPT passthrough. Even in that case, you'll need a REAL (=NOT USB) parallel port in your computer a...
by Zup
Tue 14 Jan, 2020 5:51 pm
Forum: General
Topic: Need for Speed: Special Edition black screen hang when running installer
Replies: 17
Views: 4439

Re: Need for Speed: Special Edition black screen hang when running installer

Abandonware is still copyright-protected.

Wait until copyright expires (see https://www.copyright.gov/help/faq/faq-duration.html ) or the copyright holder puts in into public domain.
by Zup
Sat 28 Dec, 2019 9:27 am
Forum: General
Topic: Is it possible to boot a guest from usb?
Replies: 15
Views: 7913

Re: Is it possible to boot a guest from usb?

This is probably just my misunderstanding of the hardware. I have an atapi drive from an old laptop and am trying to use it with PCem. I use an atapi ide to usb adaptor to connect it to my laptop. I tried a pentium overdrive mmx 200 bios and looked for a boot from usb option but could not find one....
by Zup
Fri 13 Dec, 2019 6:05 am
Forum: General
Topic: Starting PCem - How to save BIOS settings ?
Replies: 3
Views: 1648

Re: Starting PCem - How to save BIOS settings ?

Do you have write permissions on PCem folders and PCem nvr files?
by Zup
Tue 21 May, 2019 5:16 am
Forum: General
Topic: [OT-ish] fitting Linux distros?
Replies: 8
Views: 4886

Re: [OT-ish] fitting Linux distros?

I'd try a Puppy Linux, but that can be tricky. It seems that 4.x versions can run on 128 Mb, and that versions are easy to find/download. The tricky part is that you'll need to install it to hard disk (do NOT use a frugal installation), then add devx packages (to get your GCC, but I don't know which...
by Zup
Tue 21 May, 2019 5:08 am
Forum: General
Topic: Raspbian can't compile v15
Replies: 9
Views: 8028

Re: Raspbian can't compile v15

A Raspberry is a fairly slow device... what about cross-compiling from a PC to a Raspberry?
by Zup
Sun 12 May, 2019 7:29 am
Forum: General
Topic: Speed timings for emulated hard disks
Replies: 11
Views: 5407

Re: Speed timings for emulated hard disks

I rather like the idea that when creating an HD, it could be possible to select from a list of makes and models, much like you can with other hardware. Granted, it'd be little more than a cosmetic thing right now, but it'd make sizing drives easier, and not coming up with wacky geometry some OSes m...
by Zup
Sat 23 Feb, 2019 6:54 am
Forum: General
Topic: Shutdown Or Close Window
Replies: 3
Views: 2703

Re: Shutdown Or Close Window

I guess you're using Windows 95 or 98. In that systems, the proper closing procedure would be goint to Start Menu on the emulated machine, and choose Shutdown. Then wait until a screen announces that you can safely shutdown your computer and then close PCem. Failing to do so means that some files on...
by Zup
Tue 12 Feb, 2019 6:16 am
Forum: General
Topic: Maybe create a set of recommended system profiles?
Replies: 7
Views: 4482

Re: Maybe create a set of recommended system profiles?

I guess the only standard profile would be an XT with MDA/CGA with or without IDE hard disk, because this are the only roms available in PCem web (and everybody should have them), at least if you try to distribute them. For other "standard" computers, I'll mimic existing PCs. For PC/XT/AT computers ...
by Zup
Sat 26 Jan, 2019 7:58 am
Forum: General
Topic: CD Image Format - Blindwrite
Replies: 5
Views: 3900

Re: CD Image Format - Blindwrite

What about using a virtual drive like Alcohol 52% or Daemon Tools?

Mount your CD image on the virtual drive and then use it from PCem.
by Zup
Wed 23 Jan, 2019 6:17 am
Forum: General
Topic: Wordbasic overflow error 6 with DX processor
Replies: 5
Views: 4213

Re: Wordbasic overflow error 6 with DX processor

Virtualbox is virtual machine software, PCem is an emulator - they aren't really the same thing at all. Does this happen with real 486DX hardware? It's odd that it only happens with 486DX CPUs. This sort of thing leads me to believe that it's an actual bug with them or the recompiler (which is slat...
by Zup
Fri 02 Nov, 2018 4:51 pm
Forum: General
Topic: How to add an external ROM like XT-IDE?
Replies: 2
Views: 2358

Re: How to add an external ROM like XT-IDE?

To use XT-IDE ROM, open the configuration and go to the disks tab. In HDD, you must choose [IDE] XT-IDE or [IDE] XT-IDE (AT) and PCem will use that ROM. (If your computer is a IBM PS/1 model 2011, PCem will use a specific XT-IDE ROM automatically) The bad news is that you can only load XT-IDE ROMs, ...
by Zup
Sat 20 Oct, 2018 6:40 am
Forum: General
Topic: [Question] 5.25 1.2mb disks on DOS 2.0?
Replies: 6
Views: 5434

Re: [Question] 5.25 1.2mb disks on DOS 2.0?

On second thought, HD disks needs faster FDCs that maybe weren't supported in plain DOS 2.0, but I wonder it there existed a driver that could read HD floppies. If the limit is imposed by the FDC (I mean, the routines that access the FDC) it have sense that the limit are DD disks, but DOS should be ...
by Zup
Fri 19 Oct, 2018 5:21 am
Forum: General
Topic: [Question] 5.25 1.2mb disks on DOS 2.0?
Replies: 6
Views: 5434

Re: [Question] 5.25 1.2mb disks on DOS 2.0?

Maybe is not related... My ZX Spectrum +3 (a Z80 machine) had a 3 inch floppy drive (single sided, 180k/side) but can be fitted with 3.5 inch drives. +3DOS will format any disk to 180k, but (with the right tools) can use the whole 720k and plain +3DOS (was stored in ROM, so it can't be changed easil...
by Zup
Sun 14 Oct, 2018 3:59 pm
Forum: General
Topic: Host machine survey
Replies: 152
Views: 111434

Re: Host machine survey

It is possible to include the fastest virtual CPU that is possible to emulate with the physical one? Or include a FAQ or pin a post with this information. Mine is i5-3210M (2 cores / 4 threads at 2.5 GHz) and I am able to emulate up to Pentium@75 at almost full speed. I've updated my machine (mainb...
by Zup
Fri 12 Oct, 2018 6:46 am
Forum: General
Topic: External USB Floppy Drive
Replies: 2
Views: 2298

Re: External USB Floppy Drive

USB floppies (usually) are very limited. Usually they only support 1.44Mb disk, with 2 sides, 80 tracks, 18 sectors/track (starting at 0), and 512 bytes/sector (some of them also support 9 sectors/track). Usually there is no way to read odd-numbered or odd-sized sectors (Opera Soft games used to hav...
by Zup
Tue 11 Sep, 2018 6:00 am
Forum: General
Topic: Emulating an Amstrad PC5286
Replies: 9
Views: 6206

Re: Emulating an Amstrad PC5286

I wonder if MAME/MESS guys have some infos/dumps for these computers (and the more interesting Amstrad 2000 series). MESS has a driver (I don't know if it works or is a skeleton driver) for Amstrad PC2386, but there are no drivers for other (unemulated by PCem) Amstrad computers. In the meantime the...
by Zup
Mon 20 Aug, 2018 5:15 am
Forum: Patches
Topic: [patch] Systems from the first Olivetti PCS series
Replies: 37
Views: 23793

Re: [patch] Systems from the first Olivetti PCS series

I've got a set of two spanish disk for Olivetti PCS 86. Disk 1 have MS-DOS 3.30, Disk 2 have some MS-DOS files, a tutorial and a diagnostic utility. I had a friend that had a Olivetti PCS33. It came with DOS 5.0, Windows 3.x (I think it was 3.1, but maybe it was 3.0) and a disk compression utility (...
by Zup
Thu 26 Jul, 2018 9:47 pm
Forum: Development
Topic: [Request] Nvidia Riva 128 , TNT, TNT2 ,Matrox video cards
Replies: 7
Views: 6254

Re: [Request] Nvidia Riva 128 , TNT, TNT2 ,Matrox video cards

I wonder if it would be possible to make a "fake" pass-through video card... I mean, a "fake" video card in the sense that it would appear as a physical one; a pass-through in the sense that any DirectX / OpenGL call would be passed to the OS. It would require to write code inside PCem and drivers f...
by Zup
Wed 25 Jul, 2018 5:37 am
Forum: Development
Topic: My requests for PCem v15
Replies: 7
Views: 5984

Re: My requests for PCem v15

Commit this revision, please. Three methods to get your wishes granted: - Put a zero in that request (i.e.: PCem v150) and maybe in that revision all your request are fullfilled. - Pay programmers to do the work. - Make your own changes to the code so it support those items. Other means may not gua...
by Zup
Wed 13 Jun, 2018 6:44 am
Forum: General
Topic: SYS'ing with DOS 3.30 on XT using T130B
Replies: 2
Views: 2461

Re: SYS'ing with DOS 3.30 on XT using T130B

Is your disk empty? As far as I remember, in MS-DOS 1, 2 and 3 SYS needed an empty disk to work. MS-DOS 4 needed a few sectors free at the beginning of the disk or it wouldn't work (so, in practice, it was the same as needing a completely empty disk). In DOS 5 an 6, SYS could work in any disk (if it...
by Zup
Wed 23 May, 2018 4:30 pm
Forum: General
Topic: Using special machine types
Replies: 5
Views: 3635

Re: Using special machine types

PCem is not entirely cycle accurate, but the performance should be similar. Assuming that your system can emulate your machines at 100% speed, you should note performance differences (i.e.: the IBM AT should be slower than a PC-30 III, because the former had a 6 or 8 Mhz but the latter shipped with ...