1.7 Chipset
The Intel 82440LX/EX AGPset consists of one 82443LX/EX (PAC)
System Controller, and one 82371EB (PIIX4E) PCI ISA/IDE Accelerator.
82443LX/EX (PAC):
- CPU interface controller
- AGP Interface controller
- Integrated DRAM controller
- Fully synchronous PCI 2.1 bus interface
- Extensive CPU-to-AGP, CPU-to-DRAM,
CPU-to-PCI, AGP-to-DRAM, AGP-to-
PCI, PCI-to-AGP and PCI-to-DRAM data
buffering
82371EB (PIIX4E):
- Interface between the PCI and ISA buses
- Power Management Logic
- USB controller
- EIDE controller
- Seven DMA channels, one timer/counter,
two eight-channel interrupt controllers,
NMI logic, SMI interrupt logic, and PCI/
ISA bus arbitrator
- SMBus interface
- Real-Time clock
1.8 Main Memory
The P6F94 mainboard provides two 168-pin DIMM sockets. When
P6F94 equipped with Intel 82440LX chipset, it supports 64-bit or 72-bit
(64-bit memory data plus 8-bit ECC) DRAM array. When P6F94
equipped with Intel 82440EX chipset, it only supports 64-bit DRAM
array. The ECC function is not supported by Intel 82440EX chipset.
The total memory size can support from 8MB to 256MB. The sockets
support 1M x 64 (8MB), 2M x 64 (16MB), 4M x 64 (32MB), 8M x 64
(64MB) and 16Mx64 (128MB) DIMM in single or double-sided
modules.
The P6F94 supports two types of DRAMs, Extended Data Out (EDO)
and Synchronous DRAM (SDRAM). Memory Timing requires 60ns or
faster for EDO, and 66.6MHz speed grade for SDRAMs. Each DIMM
12 P6F94 User’s Manual
Chapter 1: Introduction
