MiSTer FPGA Forum

MiSTer has the AO486 core for roughly 1990's DOS and PCXT for roughly 1980's DOS. What are you specifically looking for?

The OpenBSD 2.4 installer floppy boots so a viable kernel exists. I'm too busy with my other geek projects though.

Build 134 will drop in a few minutes. It properly handles the BIOS Parameter Block and media descriptor on PC-DOS 2.00 and allows making 180KB/360KB floppies opening up this much more mainstream format. No support for subdirs yet though. IBM/MS snuck in another byte, outside of the BPB, where it indicates how many sides a floppy has. Naughty!!

Awesomeness! I've been looking at prepping a VHD for OpenBSD for a while. I started using OpenBSD 2.4 back in the day and had a nostalgic urge. Unfortunately it won't recognize a CD-ROM and I can't configure PPP networking from the install floppy so this will take some effort so I dropped it again. How did you go about setting up NetBSD?

Works in Vice as well as MiSTer for me. Do make sure you get an actual + sign and don't mix up your ; and :. Those are tricky from my PC keyboard attached to the MiSTer and fudged up my first attempt.

...so you' re a Tweaker eh?

I know how it works on a PC. I mean: to get this to work on the AO486 core.

Very interested in this. I've been trying, trying, trying and failing to get Lemmings in this mode working.

SDL seems to want a GL surface. If you disabled everything, not even software rendering may be available.

The AO486 doesn't provide a simulated controller. It intercepts BIOS functions and leans on MiSTer's main binary to provide the OS with the requested sectors. At least, that's how I currently understand it.

Not really. Mice are quite generic, even the old serial ones. You should get lucky with an ancient Cutemouse. Unless you're doing something wonky like use an InPort mouse on real hardware, but that's not the case here.

Check my anonymous FTP for stuff:

ftp.area536.com/platforms/PC/TDC/Drivers/Files

There's a bunch of different mouse drivers in there.

It's entirely plausible that this core crashes on 286 instructions. I'll try to dig up my old Genius mouse driver later today.

What if you don't load it high but just start it regularly?

Try putting the files on a tmpfs to cut io performance out of the equation if you have the RAM.

I'd try something like a flea market or online 2nd hand site to get an ancient PC. Many of those have floppy drives. Those machines could probably read your 2M formatted disks. Any local computer museum, if there are an in your area, is probably also able to help.

Here's a bit of info on what goes into creating an empty floppy that is IBM PC compatible:

https://www.area536.com/posts/anatomy-of-a-floppy/

I have a DE10-Nano.

Seems like you're using a kernel module for kernel 5.15.1 on kernel 5.13.12, which is likely to break. You need the kernel to match the module. Did you fudge around with kernel modules/drivers?