XT, AT, 286, 386, 486 with 512K minimum memory, EGA , VGA or better screen capabilities. 9 or 25 pin serial port, and a 3-1/2" or 5-1/4" disk drive.
If using a laptop that has a built in mouse or if you have a mouse driver assigned to COM 1 you must bypass the AUTOEXEC.BAT file. This can be done by pressing F5 key when the screen shows "Starting MS-DOS, or boot directly from a floppy that has the system and the Haltech program.
You must not load anything in the CONFIG.SYS or AUTOEXEC.BAT that will conflict with the COM 1 port that your Haltech must talk to.