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| Debug Card with POST
code indicator Series |
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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.
The POST card used for PC system
assembly, motherboard test and BIOS debug.
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JET-1023 ISA POST Card specification
- Full compatible with any kind motherboard which has the ISA
Bus slot.
- Dual port decoder(80H and 84H) without jumper setting, it
can use in general and Compaq motherboard.
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JET-1048 PCI+ POST Card specification
- Full compatible with any kind motherboard (such as 80486,
Pentium, Pentium II, Pentium III, AMD K5, AMD K6, AMD Athlon, AMD Duron ) which has the
PCI Bus slot.
- Support the power source working indicator --- +5V, +12V,
+3.3V, and -12V. (When indicator's LED is on to indicate its respective power is ok,
otherwise to indicate its respective power is failure)
- PCI Clock and RESET signal working indicator. (When
indicator LED is on to indicate its respective signal is OK)
- Auto port 80H/84H switch without jumper setting. It auto
switch to PORT 80H for general motherboard and to switch PORT 84H for COMPAQ motherboard
after system power for POST function execution.
- Dual POST code display --- User can readout POST at PCB
component and solder side. It is very easy to view the POST code indicator when user plug
the POST card in computer system case.
- POST code latch mode selection (JP1)
- JP1 short -- The function is setup as AUTO mode. (Its
function is same as JET-1024/V4.)
- JP1 open -- The function is setup as pure POST card mode,
it is used for user didn't read extra PCI device information when user plug the POST card.
(Its function is same as JET-1024/V3.)
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JET-1054 mini PCI POST Card specification (support
type III)
- Full compatible with any kind notebook
motherboard (such as Celeron, Pentium II, Pentium III, AMD K6 and AMD K7) which has the type III mini PCI Bus extension slot.
- Support the power source working indicator --- +5V and
+3.3V. (When indicator's LED is on to indicate its respective power is ok, otherwise to
indicate its respective power is failure)
- PCI Clock and RESET signal working indicator. (When
indicator LED is on to indicate its respective signal is OK)
- PCI signal active indicator --- FRAME#, IRDY#, TRDY#. (When
indicator LED is on to indicate its respective signal is active now)
- Auto port 80H/84H switch without jumper setting. It auto
switch to PORT 80H for general notebook motherboard and to switch PORT 84H for COMPAQ
notebook motherboard after system power for POST function execution.
- POST code display --- 2 digitals 7-segment LED display for
POST code indicator..
- Supports 4 kind POST code latch mode selection to meet
different notebook designed.
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JET-1049 PCI Checker Card specification
- POST code display --- 2 digitals 7-segment LED display for
POST code indicator..
- Full compatible with any kind motherboard (such as 486,
Celeron, Pentium II, Pentium III, Pentium 4, AMD K5, K6 and K7) which has the PCI Bus
extension slot.
- MFI (Multi-Function Indicator) --- Display the real
measurement value of PCI Clock, Temperature, +5V , +3.3V,+12V, -12V and VIO on
the MFI (3-digitals7-segment LED) without any probe operation.
- PCI Clock and RESET signal working indicator. (When
indicator LED is on to indicate its respective signal is OK)
- Auto port 80H/84H switch without jumper setting. It auto
switch to PORT 80H for general motherboard and to switch PORT 84H for COMPAQ motherboard
after system power for POST function execution.
- Supports 4 kind POST code latch mode selection to meet
different motherboard designed.
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JET-1050 PCI TEST Card specification
- Include all JET-1048 function.
- Real time and without probing
to show 10 PCI signals --- Real time monitor the 10 PCI Bus signals (such
as CLK, RESET#, FRAME#, TRDY#, DRDY#, DEVSEL# and C/BE[3:0] signals) by indicator LEDs.
The each indicator LED showed as following status for each respective signal.
- Indicator LED on (light)
to indicate its respective signal in low voltage
state.
- Indicator LED off (dark) to
indicate its respective signal in high voltage
state.
- POST code reset function
--- JET-1050 will output a pulse signal when the current POST code output value
equal to the DIP switch setup of card. (User can setup the POST code event from 00 to FF).
This function is useful to apply for
- System reliability testing --- The system will only
restart when a specific POST code output (setup by DIP switch) . In another word, the
system will stop when it doesn't reach the specific POST function. For example, the A BIOS
process the POST routine from 01(Power on 1st routine), 03 06, ... 4E, .. 00(boot-strap)
before booting the Operating System. User can setup DIP switch to "00" for this
mode, and check the POST code indicator of JET-1050 for
- POST code keep running from power on to boot --- User can
find the POST code indicator output different value on it. And it will re-start the system
when POST code output = "00".
- POST code stop a fixed value -- It indicates the system can
not pass this POST function during the reliability testing.
- Fixed time reset function
--- JET-1050 will output a pulse signal upon CN1 after system power on about N
seconds. ( N value is setup by DIP switch from 1 to 255). This function is useful to apply
for
- Burn-in testing --- The system will continues restart every
N seconds is running even the system is dead during burn-in test. (It can keep the system
is running to burn-out some defect component during QC/QA burn-in testing).
- Trouble-shooting assistant ---
- Watch Dog reset by POST port
function --- JET-1050 will output a pulse upon CN1 when the
system doesn't generate any POST code write operation over N seconds (N value is setup by
DIP switch from 1 to 255).
- Watch Dog reset by hardware
interrupt function --- JET-1050 will output a reset pulse upon CN1
when the system doesn't generate any Hardware interrupt operation over N seconds (N value
is setup by DIP switch from 1 to 255).
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The primary function of POST card is display the POST code
during system BIOS perform the Power On Self Test (POST) function.
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The primary function of POST card is display the POST
code. It is no performance consideration for using the POST card. Using the different bus
type POST card will get same result for POST code indication. The only reason will be
considered is the tested motherboard must have the empty same type bus slot to plug in the
POST card.
- If you plan to used the POST card in older motherboard (such
as 286, 386, 486), we suggest to chose the ISA type POST card. (Since some older
motherboard didn't offer the PCI bus)
- If you plan to used the POST card in current market
motherboard, we great suggestion to used the PCI bus type. (since the PC 98 specification
: ISA bus is option, PC 99 specification suggests no ISA bus slot, we think ISA bus will
be disappear for new motherboard. In fact the Intel new chipset is no ISA bus function
now)
- If you are a engineer to maintain a wide range generation
PC, you must select to use both ISA and PCI bus type POST card.
- For notebook user, we suggest you to buy the JET-1054 Mini
PCI POST card (for Mini PCI bus type III, most of new generation notebook has this kind
extension bus)
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New generation PCI POST card is
designed with the PCI bus core logic and ASIC technology. It can work in any kind
motherboard designs with PCI bus. (For the past simple GALs designed version, it just pure
designed the PORT 80/84 address decoder, it can't work in new motherboard designed that
will disable some PCI signal's function when no PCI card plug in to solve the EMI problem
and reduce system power dissipation . For this kind motherboard, if you used simple decode
POST card, it will lose the POST code readout function during POST testing. )
We create the another new auto
port 80/84 switch function in new generation PCI POST card. It can auto switch to port 80
for general motherboard , switch to port 84 for Compaq motherboard after system power on.
In new generation designed, it will not display abnormal post code and real perform the
auto-switch between port 80 and 84.
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- Turn off the system power firstly.
- Plug the POST card into empty slot that same as POST card
type for tested motherboard.
- Refer signal and power LED (if your POST card had this
function) of POST card to solve the fault function if any firstly.
- Readout the POST code when system boot up failure. Record
the POST code and check the BIOS POST lists to get POST code message to know what kind
problem occurred.
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User can get BIOS POST code lists in your motherboard
user's guide or web (Some motherboard makers offer this service). You can get the
information from BIOS vendor directly. The primary BIOS providers in current market are
list as follows:
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