Toshiba Satellite A60 Maintenance Manual - Page 24

1 Hardware Overview 1.2 System Unit Block Diagram BIOS ROM (flash E2PROM) • 4Mb x 1 chip (512KB flash parts) − 29kb used for EC BIOS − 46kb used for VGA BIOS − 29kb used for pxe boot − 4kb used for logo − 7kb used for USB − 14kb used for SCU − 2kb used for CF Card − 9kb used for PCI − 3kb used for ACPI − 14kb used for PNP − 35kb used for PM − 51kb used for system BIOS − 10kb used for micro code − 2kb used for DMI − 4kb used for password − 24kb used for boot load − 156kb reserved System controllers • North Bridge: ATI RS250 M − CPU interface and control − DRAM control − AGP master/slave interface (AGP1.0 compliant, AGP V2.0 compliant x 4 modes) − Memory 256MB,Video RAM 64MB − Memory 512MB,Video RAM 64MB • South Bridge: ATI IXP150 − Enhanced DMA controller − Interrupt controller − Counter/timer − PCI master/slave interface (PCI R2.2 compliant) − PCI IDE controller − Support for ATA-100 (30/40/60/80 GB) − USB interface − SMBus interface − LPC interface − Power management control − Suspend/resume control 1-10 Satellite A60/ Pro A60 Maintenance Manual