American Megatrends 80486 Baby EISA Motherboard User's Guide
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ADVANCED CHIPSET SETUP Options,
Continued
BCLK Stretch
Enabling this option improves system performance. BCLK (ISA and EISA Bus
Clock) stretching allows the EISA Bus Controller (EBC) to drive the
START# signal active without waiting for the next rising edge for BCLK.
BCLK is then stretched to allow START# to meet the required pulse width.
The settings are Enabled or Disabled. The BIOS Setup and Power-On
defaults are Disabled.
Back-to-Back I/O
Back-to-Back I/O is the number of wait states (BCLK cycles) added by the
hardware when two or more consecutive I/O operations occur. The BIOS
Setup and Power-On default (two wait states) usually assures proper
operation of most adapter cards. If a slower adapter card is installed,
the number of wait states can be increased. If only high speed adapter
cards are used, the number of wait states can be decreased (but always
set at least 2 wait states). The valid settings are 1 through F.
CPU Time-Slice Priority
CPU Time-Slice Priority is the number of BCLKs the Integrated System
Peripheral waits between a HOLD request input (from DMA, a bus master,
or other device) and a HOLD request to the CPU.
A higher number allows the CPU to continue running a little longer
before it is placed in HOLD. The settings are 0 through 1F. The BIOS
Setup and Power-On defaults are 0.
Содержание 64 Series
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Страница 16: ...Chapter 2 Installation 10 ...
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Страница 18: ...Chapter 2 Installation 12 ...
Страница 64: ...Chapter 4 AMIBIOS Setup 58 ...
Страница 98: ...Appendix B EISA Configuration Worksheets 92 ...