IBM Aptiva Handbook page 67

Select "YES" to release IRQ6 (Interrupt Request) when the
system does not contain a diskette drive. Also select
"Disabled" for the Onboard FDC Control Field in the
"Devices and I/O Ports" menu. See page 6-13 for
information about integrated peripherals.
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Use this setting to determine under what conditions the
power-on self-test (POST) will halt when errors are detected.
ALL errors System halts in case of any errors
No errors System won't halt in case of any errors
ALL , But keyboard System halts except for the keyboard error
ALL, But diskette Syetem halts except for the diskette error
System halts except for the diskette or keyboard
ALL, But disk/key
error
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Use this setting to set the date and time.
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You can use these features to configure advanced hardware
features. Do not attempt to change these settings unless you
have an advanced technical knowledge of computer
hardware. If these settings are configured incorrectly, the
computer might not function correctly.
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Use this setting to enable or disable the internal and external
processor cache. Overall system performance improves
when cache is enabled.
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Video BIOS Shadow
Use this setting to determine whether or not video BIOS will
be copied to RAM. Video performance improves when Video
BIOS Shadow is enabled.
Enabled Video shadow is enabled
Disabled Video shadow is disabled
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Setup parameters 6-9