3. Read CMOS data into BIOS stack area

 

4.

PnP initializations including (PnP BIOS only)

 

 

-Assign CSN to PnP ISA card

 

 

-Create resource map from ESCD

 

5.

Assign IO & Memory for PCI devices (PCI BIOS only)

0C

Initialization of the BIOS Data Area (40 : 0N 40:FF)

0D

1.

Program some of the Chipset’s value according to Setup.

 

 

(Early Setup Value Program)

 

2.

Measure CPU speed for display & decide the system

 

 

clock speed

 

3.

Video initialization including Monochrome,CGA,EGA / VGA.

 

 

If no display device found, the speaker will beep

0E

1.

Initialize the APIC (Multi-Processor BIOS only)

 

2.

Test video RAM (If Monochrome display device found)

 

3.

Show messages including:

 

 

-Award Logo, Copyright string, BIOS Date code

 

 

& Part No.

 

 

-OEM specific sign on messages

 

 

-Energy Star Logo (Green BIOS ONLY)

 

 

-CPU brand, type & speed

 

 

-Test system BIOS checksum(Non-

 

Compress

 

 

Version only)

0F

DMA channel 0 test

10

DMA channel 1 test

11

DMA page registers test

12-13

Reserved

14

Test 8254 Timer 0 Counter 2.

15

Test 8259 interrupt mask bits for channel 1

16

Test 8259 interrupt mask bits for channel 2

17

Reserved

19

Test 8259 functionality

1A-

Reserved

1D

 

 

25

Page 25
Image 25
Intel 430TX user manual Read Cmos data into Bios stack area

430TX specifications

The Intel 430TX chipset, introduced in the mid-1990s, was a significant advancement in computer technology, primarily designed to support Intel's Pentium processors. This chipset catered to the growing demand for improved multimedia performance, better system stability, and expanded features to accommodate developing applications.

One of the main features of the Intel 430TX was its support for Dual Independent Bus architecture. This allowed for simultaneous data transfers between the CPU and the memory, significantly improving system performance. The chipset supported up to 512 MB of EDO (Extended Data Out) RAM and featured a memory bus that could handle speeds of up to 66 MHz, making it suitable for a variety of applications ranging from home computing to business use.

Another significant characteristic of the 430TX was its integration of a PCI (Peripheral Component Interconnect) bus, which allowed for higher bandwidth compared to the older ISA (Industry Standard Architecture) connections. The chipset provided up to five PCI slots, facilitating the addition of modern peripherals like graphics cards, sound cards, and network interfaces without compromising system performance. This flexibility was vital as multimedia applications became increasingly common during that era.

The Intel 430TX also incorporated support for the newer ATA/33 standard for hard drives, allowing for faster data transfer rates compared to previous standards. This enhancement contributed to improved overall system responsiveness. Moreover, the chipset partially supported USB (Universal Serial Bus) devices, paving the way for the increasingly popular external peripherals that were emerging at the time.

In terms of power management, the 430TX featured advanced management capabilities, allowing the system to achieve better energy efficiency through features such as ACPI (Advanced Configuration and Power Interface) support. This was particularly important as users began to prioritize environmental concerns alongside performance.

Overall, the Intel 430TX chipset represented a balance of performance, compatibility, and innovative feature integration. Its legacy is evident in the foundational technologies it helped propel, influencing the design and features of future chipsets. Today, revisiting the Intel 430TX illustrates the rapid technological evolution that has occurred since its introduction, underscoring its importance in the development of modern computer systems. The 430TX was pivotal in bridging the gap between early PC architectures and the advanced systems we utilize today.