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Use Of Debug Card Post Error & Code
Introduction of POST Card
JET-1023 ISA POST Card
JET-1048 PCI+POST Card
JET-1054 Mini PCI POST Card (Type III for notebook)
JET-1049 PCI Checker Card
JET-1050 PCI Test Card
What is POST Card function ?
How to select the POST Card?
What is new generation PCI POST card design?
Instruction guide for using the POST card
Where to get BIOS POST Code Lists information?
Introduction
The primary function of POST card is to latch and display the BIOS POST code on card.
During system power on, the M/B perform the POST (Power On Self-Test) routines. The
main purpose of these routines are to perform the diagnostics test upon the system
component, device detection and chipset initialization etc,. The BIOS will put the POST
code in the POST port (for normal M/B is Port 80h, and Compaq is 84h) before each
respective task routine is performing.
When user plug the POST Card into motherboard, we will find the two digitals' 7-
segment LED flash display the different value on it quickly. Each digital value presents
its respective routine of BIOS POST routine. If BIOS can't load the Operating System
(O.S.) from disk drive, you will find the POST card stop and fixed display the specific
code on it. It is mean the BIOS can't pass the program of POST. User can look up the
BIOS POST lists to know which function is defects. And rough to know what kind
problem occurs.
For the current POST card products, we find the ISA (such as JET-1023 ISA POST card)
, PCI (such as JET-1048 PCI POST card) and Mini PCI (such as JET-1054 Mini PCI
POST card type III) version are more public on the market. Since the primary function of
POST card is to display the POST code, we don't need to consider the performance for
different bus slot. To use the ISA or PCI type POST card will get the same result for
POST code indicator. We only need to concern the point is the system support the bus
which can let POST card plug in or not. For PC 98 specification, the ISA is optional
specification. For PC 99, it suggests PC system doesn't support low speed ISA bus slot
(We can find the newer Intel chipset doesn't have supported the ISA specification). For
PC development trend, ISA will disappear soon that may be 1 or 2 years. In the above
conclusion, we know the PCI bus is primary extended bus in current PC architecture. So
use PCI POST card is best choice for using in new PC structure.
