Apple Macintosh LC 630 DOS - Manual (Page 128)

The PC Setup icon has a red slash through it at startup.
If PC Setup doesn’t have enough memory to allocate to the PC at startup time,
it will turn itself off. Check the Memory control panel for disk cache and
RAM disk sizes; the disk cache should be set no higher than 128K, and the
RAM disk should be off (or have a small amount of memory allocated to it).
Restart the Macintosh if you change either of these settings.
If these steps don’t correct the problem, throw away the PC Setup Prefs file in
the Preferences folder within the System Folder and restart the Macintosh.
Then use the PC Setup control panel to recreate your settings.
When I switch to the Mac OS from the PC environment, the following message appears:
“PC Clipboard requires additional system services in order to function. Please ensure
that the DOS-compatibility card is successfully installed.”
Macintosh Easy Open software is either not installed or has been turned off.
Turn on the Macintosh Easy Open control panel, or reinstall it from the DOS
Compatibility Installer (for the Mac OS) disk. If your computer has a built-in
CD-ROM drive and you don’t have the floppy disk, use the DOS Compatibility
Installer program on the CD-ROM disc that contains system software.
I set the DOS-compatibility card to use 4 MB (or more) of RAM, but I get an error
message from my PC application program saying that there’s not enough memory
to run it.
If you are sharing memory between the Macintosh and PC, the Mac OS may
be using some of the RAM you requested for the PC. Turn off the RAM disk,
if you’re using one, in the Memory control panel; then restart the Macintosh.
A PC program displays a message that it needs 540K to run, but I have 4MB of memory
allocated to the PC environment.
The program is referring to conventional memory. Most of the balance of the
4 MB of memory you assigned to the PC is used by the EMM386 memory
management software. Configure your application program to use more
extended memory and less conventional memory. You may also need to
disable some device drivers or other software in your CONFIG.SYS and
AUTOEXEC.BAT files to free up more conventional RAM. See the section
on managing memory in your DOS manual for more information.
117 Troubleshooting in the PC Environment