![background image](http://html.mh-extra.com/html/nec/versa-note-series/versa-note-series_service-and-reference-manual_249130070.webp)
Software Functional Overview 3-7
Panel Type Initialization
The VGA BIOS will issue an INT 15h function call during POST. This function
call allows the system BIOS to specify the panel type to the VGA BIOS. The
system BIOS gets the panel type from GPI pins before the VGA chip initializes
and passes this information to VGA BIOS through INT 15 Function 5F40h.
Supported LCD panel type
Panel Type
Display Size
Panel Description
Type 2
800*600
12.1” TFT NEC
Type 3
1024*768
13.3” TFT NEC
Enhanced IDE
The system BIOS supports 4 IDE devices on two controllers up to an 8 GB
capacity. The BIOS supports Ultra DMA 33 and automatic configuration of
drives using both the LBA and CHS large drive re-mapping method. In addition,
the system supports standard drives through an auto-configuration process that
does not require user involvement or confirmation. The system does this
automatically at POST time in a way that is transparent to the user. If a drive is
connected to the bus, the drive is automatically recognized, configured and
available for use under MS-DOS 6.2x.
Ultra DMA
Ultra DMA/33 is a new physical protocol used to transfer data between an Ultra
DMA/33 capable IDE controller and one or more Ultra DMA/33 capable IDE
devices. It utilizes the standard Bus Master IDE functionality and interface to
initiate and control the transfer. Ultra DMA/33 utilizes a source-synchronous
signaling protocol to transfer data at rates up to 33 Mbytes/sec. The Ultra
DMA/33 definition also incorporates a Cyclic Redundancy Checking (CRC-16)
error checking protocol.
Audio
The Maestro-2 audio digital accelerator is a highly integrated PCI audio solution
which includes advanced audio features. These features consist of a 64-voice
wavetable synthesizer with Downloadable Sample (DLS) and complete
DirectSound support. The Maestro-2 power management complies with ACPI
1.0 and APM 1.2. It also supports both PC97 logo requirements and DOS game
compatibility.
Super I/O
The Super I/O Controller chip provides the following features:
n
3.3 Volt Operation
n
Intelligent Auto Power Management
n
Two High Speed NS16C550 Compatible UARTs with Send/Receive 16
Byte FIFOs