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Assigning RAM to the PC environment
The PC environment needs memory to operate. You can provide memory
with a SIMM (Single Inline Memory Module) installed on the DOS-
compatibility card in your computer, or by assigning RAM to the PC
environment from your Macintosh. If a memory module is installed on the
DOS-compatibility card, the RAM pop-up menu items in the PC Setup
control panel will be dimmed (unavailable). The amount of memory available
to the PC environment will depend on the amount of RAM on the installed
memory module. See the Technical Information booklet to find out whether
your DOS-compatibility card includes a memory module and what RAM
capacity the memory module has. If a memory module is installed, skip to
“Reinstalling PC Software,” next.
Memory installed on the DOS-compatibility card in your computer is for the
exclusive use of the PC environment, and provides a marked improvement in
performance of PC application programs.
If no memory module is installed, you need to assign RAM to the PC.
1Choose 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 improve if you allocate more memory to
the PC environment. However, RAM assigned to the PC environment is not
available in the Mac OS until you turn off the PC environment 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
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Troubleshooting in the PC Environment