Debugger-2 for PCI-bus

* PCI card plugged into connector figure

* Could modify BIOS port 80h(POST code decode address) to other port address, 

example 80h+84h, each piece plus U$5.-

Single step function must execute immediately after Power-On, 

execute on the other status, system will be halted.

CV-25PD DEBUGGER-2 

Function Description:

* Suitable for PC 486/586/PII/PIII... PCI-BUS compatible system.

* LED inductor: CBE0, CBE1, CBE2, CBE3, RST(RESET), FRAME, IRDY, TRDY,

VCC, GND, +12V, -12V.

* Chose "POST"(POST=Power-On-Self-Test), ERROR CODE DISPLAY:

(1) DIGITs display for hexadecimal.

(2) Offer two I/O PORT 80H and 300H check point.

A. Hardware Debug:

Read BIOS check point value, compare with BIOS ERROR CODE MESSAGE, will know

defective position.

B. Software Debug:

Use CV-25PD for CHECK POINT display, can WRITE value to it, no need to interrupt

program execution.

* Chose "STEP" for Step by step(trace) function:

Use 32pcs LED display PCI- bus AD0-AD31 in binary system.

(1) When ERROR CODE display nonsense code 00 or FF, can use CV-25PD to check

PCI-BUS circuit correct or not.

(2) Can trace BIOS operation.

(3) Can check PCI-BUS circuit open/short or not.

(4) Can check PCI-BUS shortage with other signals or not.

(5) Will know real address when system halted.

Combine CBE0, CBE1, CBE2, CBE3, FRAME signals, select different BUS

COMMAND, trace different status AD-BUS signal.

Use RESET, IDSEL, FRAME, TRDY, DEVSEL, STOP, VCC signals, select one of

signal, to trace different status AD-BUS signal.

* R/W AD-BUS display and REAL AD-BUS display, use 32pcs LED for AD0-AD31

binary code display, easier to judge BUS circuit open/short or not, or whether shortage

with other signals or not.

CV-26PD DEBUGGER-2  

* All functions, operations, testing same as CV-25PD.

* Difference: DIGITs display PCI AD-BUS codes in hexadecimal for easy view.

CV-27PD DEBUGGER-2 

* All functions, operations, testing same as CV-25PD.

* Difference: With LED and DIGITs synchronous display PCI AD-BUS easier to know

all the status.

* Could modify BIOS port 80h(POST code decode address) to other port address, 

example 80h+84h, each piece plus U$5.-

Start: 21/04/1998 Update: 09.29.2009