Apple Macintosh LC 630 DOS - Manual (Page 134)

Memory installed on the DOS-compatibility card in your computer is for the
exclusive use of the PC environment, and provides a marked increase in
performance of PC applications.
If no memory module is installed, you need to assign RAM to the PC.
1 Choose a memory size from the RAM pop-up menu in the PC Setup control panel.
If you’re installing DOS only, choose a minimum of 2 MB. If you intend to
install Windows, choose a minimum of 4 MB.
Note: Windows performance will increase if you allocate more memory to
the PC. However, RAM assigned to the PC is not available in the Mac OS
until you turn off the card in the PC Setup control panel and restart the
computer.
2 Restart the Macintosh.
IMPORTANT If the RAM size is set to 2 MB, modify the CONFIG.SYS file in
DOS as follows:
DEVICE=C:\DOS\HIMEM.SYS /TESTMEM:OFF
Reinstalling PC software
You begin by installing the Microsoft MS-DOS operating system included
with your computer. You can also install Microsoft Windows if you wish.
1 Open the PC Setup control panel and click Switch to PC.
The Macintosh desktop disappears, and you see a message about a missing
operating system or about a disk error. Ignore the message.
2 Insert the CD-ROM disc containing DOS and Windows software into the computer’s
CD-ROM drive.
If you are using floppy disks, insert the Microsoft MS-DOS Setup floppy disk
and press Return.
The DOS disks and manual are in the same shrink-wrapped package.
3 If you are using the CD-ROM disc, find and open Microsoft MS-DOS Setup.
123 Troubleshooting in the PC Environment