User manual TYAN TIGERCUB ATX

[. . . ] What's New? We have added a glossary to our manuals and have expanded our installation guide. Our simple but accurate glossary explanations make it possible for the most novice of end users to understand the technical jargon that pops up in these pages. The numerous pictures in the stepby-step installation guide make it easy for you to put together your system without help from technical support personnel. Visit the TYAN web page and let us know about it at www. tyan. com/html/contacts. html Table of Contents 1. [. . . ] DOS may load terminate-and-stay-resident (TSR) programs, such as device drivers, in this area, to free as much conventional memory as possible for applications. Lines in your config. sys file that start with loadhigh load programs into high memory. http://www. tyan. com BIOS 47 Chapter 4 BIOS Configuration BIOS Features Setup This screen contains industry-standard options additional to the core PC AT BIOS. This section describes all fields offered by Award Software in this screen. Your system board designer may omit or modify some fields. ROM PCI/ISA BIOS (2A69JT50) BIOS FEATURES SETUP AWARD SOFTWARE, INC. Virus Warning CPU Internal Cache External Cache Quick Power On Self Test Boot Sequence Swap Floppy Drive Boot Up Floppy Seek Boot Up NumLock Status Boot Up System Speed Gate A20 Option Typematic Rate Setting Typematic Rate (Chars/Sec) Typematic Delay (Msec) Security Option PCI/VGA Palette Snoop Assign IRQ For VGA OS Select For DRAM > 64MB : Disabled : Enabled : Enabled : Disabled : A, C, SCSI : Disabled : Enabled : On : High : Fast : Disabled :6 : 250 : Setup : Disabled : Enabled : Non-OS2 Video BIOS Shadow : Enabled C8000-CBFFF Shadow : Disabled CC000-CFFFF Shadow : Disabled D0000-D3FFF Shadow : Disabled D4000-D7FFF Shadow : Disabled D8000-DBFFF Shadow : Disabled DC000-DFFFF Shadow : Disabled ESC : Quit -¯ ®¬ : Select Item F1 : Help PU/PD/+/- : Modify F5 : Old Values (Shift)F2 : Color F6 : Load BIOS Defaults F7 : Load Setup Defaults Virus Warning When enabled, you receive a warning message if a program (specifically, a virus) attempts to write to the boot sector or the partition table of the hard disk drive. Keep in mind that this feature protects only the boot sector, not the entire hard drive. Note: Many disk diagnostic programs that access the boot sector table can trigger the virus warning message. If you plan to run such a program, we recommend that you first disable the virus warning. http://www. tyan. com 48 CPU Internal Cache/External Cache Cache memory is additional memory that is much faster than conventional DRAM (system memory). CPUs from 486-type on up contain internal cache memory, and most, but not all, modern PCs have additional (external) cache memory. When the CPU requests data, the system transfers the requested data from the main DRAM into cache memory, for even faster access by the CPU. The External Cache field may not appear if your system does not have external cache memory. Quick Power On Self Test Select Enabled to reduce the amount of time required to run the poweron self-test (POST). Boot Sequence The original IBM PCs loaded the operating system from drive A (floppy disk), so IBM PC-compatible systems are designed to search for an operating system first on drive A, and then on drive C (hard disk). However, modern computers usually load the operating system from the hard drive, and may even load it from a CD-ROM drive. The BIOS now offers a large number of boot devices and boot sequence options. Swap Floppy Drive This field is effective only in systems with two floppy drives. Selecting Enabled assigns physical drive B to logical drive A, and physical drive A to logical drive B. Boot Up Floppy Seek When Enabled, the BIOS tests (seeks) floppy drives to determine whether they have 40 or 80 tracks. Only 360-KB floppy drives have 40 tracks; drives with 720 KB, 1. 2 MB, and 1. 44 MB capacity all have 80 tracks. Because very few modern PCs have 40-track floppy drives, we recommend that you set this field to Disabled to save time. BIOS http://www. tyan. com 49 Chapter 4 BIOS Configuration Boot Up NumLock Status Toggle between On or Off to control the state of the NumLock key when the system boots. When toggled On, the numeric keypad generates numbers instead of controlling cursor operations. Boot Up System Speed Select High to boot at the default CPU speed; select Low to boot at the speed of the AT bus. Some add-in peripherals or old software (such as old games) may require a slow CPU speed. [. . . ] PCI refers to the type of bus used by these modes to communicate with the CPU. PCI-to-PCI bridge allows you to connect multiple PCI devices onto one PCI slot. Pipeline burst SRAM is a fast secondary cache. It is used as a secondary cache because SRAM is slower than SDRAM, but usually larger. Data is cached first to the faster primary cache, and then, when the primary cache is full, to the slower secondary cache. http://www. tyan. com 78 Pipelining improves system performance by allowing the CPU to begin executing a second instruction before the first is completed. A pipeline can be likened to an assembly line, with a given part of the pipeline repeatedly executing a set part of an operation on a series of instructions. PM timers (Power Management timers) are software timers that count down the number of seconds or minutes until the system times out and enters sleep, suspend, or doze mode. PnP is an acronym for Plug and Play, a design standard that has become ascendant in the industry. [. . . ]