Follow the same disk switch steps outlined above:Īfter the install completes, Doom Setup will automatically launch. You’ll be asked to switch disk a few times. Then type INSTALL.BAT to begin the Doom install: Navigate to the floppy drive by typing A. Hit Windows Key + F12 for ao486 core options, set Floppy A: to the Doom disk1.img Time to install Doom! From the DOS prompt: ao486 will restart and boot to DOS from your new hard disk: Follow the same disk switch steps as above, but this time hit Backspace to unmount the floppy: At the final stage, you’ll be asked to “Remove disks from all floppy disk drives”.Hit Windows Key + F12 for ao486 core options, set Floppy A: to disk2.img or disk3.img as prompted, then hit Esc: You’ll be be asked to switch disk a few times.Hit Enter and follow the prompts to install DOS: ao486 will reboot into MS-DOS 6.22 Setup. Set Floppy A: to the DOS 6.22 disk1.img and IDE 0-0 to DOS.vhd: Hit Windows Key + F12 for ao486 core options.Browse to Computer -> ao486 to start the ao486 core: Press F12 to bring up the MiSTer main menu.We’ll use this for our primary hard disk:ĭd if=/dev/zero of=DOS.vhd bs=1M count=2048 Invoke the following command to create a 2GB file ( DOS.vhd) filled with zeros. SSH into your MiSTer and navigate to /media/fat/games/AO486 (see “Shell Access” on this page to learn how) disk1.img, disk2.img – Doom install imagesĭownload and copy boot0.rom and boot1.rom to /media/fat/games/AO486 on your MiSTer:.disk1.img, disk2.img, disk3.img – DOS 6.22 install images.Step 1 – Download and Copy Install Mediaĭownload, extract and copy the following floppy disk images to /media/fat/games/AO486 on your MiSTer: “Extras” like CD-ROM support, memory management etc will wait for future posts. These are some quick and lean steps to get up and running with DOS and a copy of Doom. MIDI device support, built-in Roland MT-32 emulation.Sound Blaster Pro and Sound Blaster 16 support.In addition to the CPU, the ao486 core also includes: Performance-wise, the core is in line with a i486DX-33 CPU – only with a missing FPU. Together with the 486 core, the ao486 project also contains a SoC capable of booting DOS, Windows 3.1, Windows 95 and Linux kernel 3.13. What is ao486?Īo486 is a x86 PC-compatible core implementing all features of an 80486SX CPU. You’ve followed the setup guide and know how to copy files to your MiSTer. MiSTer AO486 Core Part 1 – Getting Started

Windows 95 floppy disk set