AMD 4.4.5 Bios Developer’s Quick Start Guide, Loading a Bios Image, Changing Dram Size, 167

	AMD Confidential
User Manual	November 21st, 2008

14 BIOS Developer’s Quick Start Guide

This section provides you with instructions on how to perform common tasks within the simulation environment. The tasks described in this section are likely to be of particular interest to BIOS developers. However, developers of other types of software will benefit as well, especially from tasks like logging CPU cycles and using the debugger.

14.1 Loading a BIOS Image

1.Move the BIOS ROM image into your Images directory.

2.Use “View→Show Devices” to show the Devices Window, shown in Figure 3-2on page 9.

3.Right-click on the system-BIOS memory device icon in the Device Window and select the “Configure Device” option on the Workspace Popup Menu (Figure 3-3on page 11).

4.Choose the “Memory Configuration” tab.

5.Enter the appropriate base address and size for your BIOS ROM.

6.Browse for your BIOS ROM image file. The browser will only show files that have a ROM or BIN filename extension.

7.Select the read-only option, unless the BIOS code will modify its image within the device.

8.For most BIOS ROM select the system BIOS ROM, memory-address masking, and memory is non-cacheable options.

9.Click OK to close the configuration dialog and accept the changes.

14.2 Changing DRAM Size

There are two ways to configure the simulated memory size. For generic memory size configuration in powers of two you can use the Memory Configurator, see Figure 14-1and for specific or non-symmetric DIMM configurations please follow the steps on page 168.

To open the Memory Configurator dialog click on the main menu item View and then choose Show Memory Configurator (View→Show Memory Configurator).

The Memory Configurator populates each DIMM device with two DIMMs of all identical size and type. It accounts for DDR and DDR2 and registered or unregistered memory types as required. The SPD files are loaded using the default path for SPD files “./Images/<spdfile>”.

Please be advised that memory configurations that are too large will slow down the simulation significantly and may also confuse some BIOS's.

Note: The public release of the simulator supports only up to four GB of simulated memory.

Chapter 14: BIOS Developer‟s Quick Start Guide 167