Search found 49 matches

by teppic
Wed 20 Jan, 2021 3:03 am
Forum: General
Topic: [BUG] Floppy drive formatting issues
Replies: 0
Views: 317

[BUG] Floppy drive formatting issues

I'm having issues formatting floppies on some machines when trying to format a 1.44M image (tried in MS DOS 3.3 and 6.22 with nothing loaded). Configuration is set to a 1.44M drive and the BIOS is set to 1.44M also. EDIT: I tried a couple more machines and it looks like it might affect all AMI BIOS ...
by teppic
Mon 04 Jan, 2021 8:58 pm
Forum: Development
Topic: v17 compatibility & bug list
Replies: 67
Views: 14629

Re: v17 compatibility & bug list

Borland Turbo Pascal 6 and 7 (for DOS) causes a full lock up a few seconds after loading in Windows 3.11 when the dynamic recompiler is enabled. On a 486 machine with it disabled it runs absolutely fine, with it enabled it locks up. On Pentium machines it seems you can't disable it, and it locks up ...
by teppic
Fri 01 Jan, 2021 2:10 pm
Forum: General
Topic: Best option for Windows 3.11 and high res/colours
Replies: 14
Views: 9179

Re: Best option for Windows 3.11 and high res/colours

I'm not sure if there's a regression with this since I last tried. When I installed these drivers on v17 (tried a couple of machine types) on an otherwise totally vanilla set up, opening a DOS session in Windows locks up the emulated system every time. I tried it with and without emm386 loaded. I gu...
by teppic
Thu 31 Dec, 2020 4:20 pm
Forum: General
Topic: Question about lower level hardware emulation
Replies: 2
Views: 603

Re: Question about lower level hardware emulation

Ah, I thought they'd probably be ignored. I guess emulating a lot of the finer details in chipsets would be a huge amount of work for mostly just academic benefit.
by teppic
Thu 31 Dec, 2020 10:46 am
Forum: General
Topic: Question about lower level hardware emulation
Replies: 2
Views: 603

Question about lower level hardware emulation

In the BIOS settings for most 486+ machines you get options to change lots of advanced things like AT bus speed, IO recovery, ISA waitstates, etc. Does changing these have any effect on emulation at all? I tried setting things to options that I imagine would stop any real PC from even POSTing but co...
by teppic
Sun 19 May, 2019 7:33 pm
Forum: General
Topic: Award 430vx pci is missing in v15
Replies: 8
Views: 6852

Re: Award 430vx pci is missing in v15

From the commit log:

Rename Award 430VX PCI to Shuttle HOT-557.
by teppic
Mon 25 Mar, 2019 10:24 am
Forum: Development
Topic: v15 & new recompiler update
Replies: 86
Views: 61562

Re: v15 & new recompiler update

Hey Sarah, I was just wondering if you'd decided to make development private until release, as I noticed the repository hasn't had many updates at all for quite a while. Seems we're just getting towards spring so I'm looking forward to seeing what v15 has.
by teppic
Mon 05 Feb, 2018 4:38 pm
Forum: General
Topic: 430VX and Win98/ME now crashes PCem
Replies: 25
Views: 12605

Re: 430VX and Win98/ME now crashes PCem

Seems the Red Hat problem has led to all sorts of issues. I hope it's exposed proper bugs rather than just been a pain!
by teppic
Sat 27 Jan, 2018 8:24 am
Forum: Merged patches
Topic: [Patch] Floppy emulation on old Linux kernels
Replies: 5
Views: 4105

Re: [Patch] Floppy emulation on old Linux kernels

Yay, great work.
by teppic
Thu 25 Jan, 2018 11:09 am
Forum: Development
Topic: Floppy emulation on old versions of Linux
Replies: 5
Views: 4739

Re: Floppy emulation on old versions of Linux

Thanks for looking into that. Maybe Sarah can see what's going on with the changes in PCem?
by teppic
Wed 24 Jan, 2018 9:06 pm
Forum: Development
Topic: Floppy emulation on old versions of Linux
Replies: 5
Views: 4739

Re: Floppy emulation on old versions of Linux

I investigated this a little more. The same lockup problem occurs in Red Hat 5.2, but this is available as a bootable ISO CD. It wasn't anything to do with booting from the floppy itself. If I disabled the floppy controller in the BIOS the CD would boot normally (but obviously without any floppy dri...
by teppic
Wed 24 Jan, 2018 2:03 pm
Forum: General
Topic: Amstrad 1512 HD Version
Replies: 19
Views: 9371

Re: Amstrad 1512 HD Version

The Readme has a link for the XTIDE ROM (freely distributable). You're not allowed to link to copyright restricted ROMs though. "[IDE] XTIDE 8-bit IDE controller. The BIOS is available at : http://code.google.com/p/xtideuniversalbios/ v2.0.0 beta 1 is the version I've mostly tested. v2.0.0 beta 3 is...
by teppic
Wed 24 Jan, 2018 1:29 pm
Forum: General
Topic: Amstrad 1512 HD Version
Replies: 19
Views: 9371

Re: Amstrad 1512 HD Version

You need to copy the BIOS files into the rom folder.
by teppic
Wed 24 Jan, 2018 9:07 am
Forum: General
Topic: Amstrad 1512 HD Version
Replies: 19
Views: 9371

Re: Amstrad 1512 HD Version

Wrong place, see here: https://i.imgur.com/w0RkhkS.png
by teppic
Wed 24 Jan, 2018 8:51 am
Forum: General
Topic: Amstrad 1512 HD Version
Replies: 19
Views: 9371

Re: Amstrad 1512 HD Version

The XTIDE BIOS is already in PCem I think, you can select the controller under "HDD" in settings. The Xebec BIOS must be called ibm_xebec_62x0822_1985.bin and copied to the roms folder.
by teppic
Wed 24 Jan, 2018 8:31 am
Forum: General
Topic: Amstrad 1512 HD Version
Replies: 19
Views: 9371

Re: Amstrad 1512 HD Version

Ok, you need the BIOS for the Xebec adapter for it to work. You should be able to find it online.

Alternatively you might be able to get XTIDE to work, this is emulating a modern bit of hardware for old 8bit XT PCs and its BIOS is included.
by teppic
Wed 24 Jan, 2018 8:19 am
Forum: General
Topic: Amstrad 1512 HD Version
Replies: 19
Views: 9371

Re: Amstrad 1512 HD Version

You select the MFM fixed disk adapter as the hard drive type in settings, it's the original IBM XT hard drive controller and emulation is provided by PCem.
by teppic
Wed 24 Jan, 2018 4:01 am
Forum: General
Topic: Amstrad 1512 HD Version
Replies: 19
Views: 9371

Re: Amstrad 1512 HD Version

You can add the MFM fixed adapter and use one of the supported disk types (type 13 at 20mb is fine), and it will automatically work under DOS 2 or later. It installs its own BIOS to enable support, and DOS 2 is required for HD support.
by teppic
Sun 07 Jan, 2018 4:25 pm
Forum: Development
Topic: Floppy emulation on old versions of Linux
Replies: 5
Views: 4739

Re: Floppy emulation on old versions of Linux

The image works on VirtualBox and on the unofficial PCem fork - maybe there's some bug with how it sends raw codes to the drive instead of using the BIOS?
by teppic
Fri 05 Jan, 2018 8:33 pm
Forum: Development
Topic: Floppy emulation on old versions of Linux
Replies: 5
Views: 4739

Floppy emulation on old versions of Linux

With older Linux systems that were installed using a floppy there seems to be a bug with floppy drive detection. The boot begins but when the kernel finds the drive(s) it freezes. I've tried a few emulated machines and it's the same result. Here is Red Hat Linux 4.1's boot floppy: https://ufile.io/p...
by teppic
Tue 02 Jan, 2018 5:42 pm
Forum: General
Topic: Linux
Replies: 13
Views: 9516

Re: Linux

Distributions from around 2000 or so should run fine on a 486, I remember it was popular to stick Linux on those back then. The desktop systems were usable for sure if a bit rough around the edges.
by teppic
Mon 01 Jan, 2018 6:04 pm
Forum: General
Topic: v13.1 released!
Replies: 25
Views: 17112

Re: v13.1 released!

I know this was only a minor release for bug fixes but I hope Sarah will make some more so those of us who don't compile between releases can get some of the fixes that'll come before v14. But either way, keep up the good work Sarah! Meh, I can see the appeal on the distant releases. It's a coding ...
by teppic
Sun 31 Dec, 2017 5:33 pm
Forum: General
Topic: v13.1 released!
Replies: 25
Views: 17112

Re: v13.1 released!

I know this was only a minor release for bug fixes but I hope Sarah will make some more so those of us who don't compile between releases can get some of the fixes that'll come before v14. But either way, keep up the good work Sarah!
by teppic
Sat 30 Dec, 2017 4:51 pm
Forum: General
Topic: Problems with some Origin games
Replies: 39
Views: 24598

Re: Problems with some Origin games

You probably have EMM386 running with NOEMS (or not running at all). Use the RAM option to enable EMS and VCPI.
by teppic
Thu 28 Dec, 2017 4:16 pm
Forum: General
Topic: CDROM on older machines
Replies: 10
Views: 6259

Re: CDROM on older machines

Yeah, just one port with master/slave rather than two ports with two sets, as was common for all machines from the pentium onwards until SATA replaced IDE.
by teppic
Wed 27 Dec, 2017 3:34 pm
Forum: General
Topic: CDROM on older machines
Replies: 10
Views: 6259

Re: CDROM on older machines

Ah, I thought PCEM must be injecting something since as you say the BIOS on those machines can't see anything. First, I'm not sure what you call "older machines" all PCem machines are more than 20 years old... By default, PCem assigns D: to the CDROM... but that can be easily configured in the menu ...
by teppic
Tue 26 Dec, 2017 10:13 pm
Forum: General
Topic: CDROM on older machines
Replies: 10
Views: 6259

CDROM on older machines

I see that PCEM by default wants to add a CDROM drive to E: and that on newer machines that will add it to the 2nd native IDE controller (master). But what does it do on older machines with just one controller? Does it add its own BIOS like an expansion card? I've noticed the CD drive is still detec...
by teppic
Sun 17 Dec, 2017 9:44 am
Forum: General
Topic: v13.1 released!
Replies: 25
Views: 17112

Re: v13.1 released!

With this release I get an SDL2.dll not found error at start up, doesn't happen with 13.0.

edit: I know I can fix it by downloading the DLL (which works), just not sure if this extra requirement in 13.1 is intentional.
by teppic
Sun 30 Jul, 2017 9:47 am
Forum: Development
Topic: Patches for wxWidgets/SDL2
Replies: 22
Views: 11872

Re: Patches for wxWidgets/SDL2

The new SDL UI is part of the official release now? That's nice for us Linux people :)
by teppic
Thu 20 Jul, 2017 10:17 pm
Forum: General
Topic: Recommended settings for bog-standard i286
Replies: 15
Views: 7688

Re: Recommended settings for bog-standard i286

The XT (original PC) line had 8 bit expansion slots, the AT (286 lines) had 16bit, which are backwardly compatible with 8bit. 386SX systems also had 16bit because everybody still used 16bit expansion cards when the CPU was released. I wondered about the video speed settings myself - I just select wh...