Hardware Functional Overview 4-11
Cache Memory
The Intel Mobile Module has two 100pins TSOP footprints for 512KB direct-
mapped write-back L2 cache memory.
System Memory
The memory subsystem, implemented on the motherboard, includes System and
Video memory. Primary control for the system memory is provided by the Intel
443BX/430TX System Controller chip.
System Memory
The notebook offers two (2) 64-bit SODIMM (Small Outline Dual Inline
Memory Module) sockets for main memory configuration. The three memory
sockets accept any standard 144-pin SODIMM modules at 8MB, 16MB, 32MB,
64MB sizes. Memory modules are SDRAM type.
Note:
Refer to Chapter 2 on System Upgrade to know
more about upgrading the system memory and the possible
memory configurations.
Video Memory
The video memory of the notebook is embedded inside the VGA controller chip.
128-bit bus (NMG4) interface with 2MB video memory that can support display
resolutions of up to 1024 x 768 at 256K colour (TFT LCD).
System BIOS
The notebook utilizes the Phoenix BIOS 4.0 Release 6.0 (Basic I/O System) that
contains both the main system BIOS and the VGA BIOS with Shadow BIOS
capability. It utilizes Flash EPROM BIOS which allows instant erasing and
programming without replacing the EPROM chip.
The BIOS is stored in a 32-pin PLCC package FLASH ROM 29EE020 120ns
with 4Mbit size and is mounted into the motherboard. While posting the system,
the Shadow RAM will be enabled and the ROM will be disabled.
Video Subsystem
The video subsystem, implemented on the motherboard and the LCD panel,
controls the display output to both the LCD Panel screen and to the external
VGA port.
