DEBUGGER-3

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

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

CV-30 DEBUGGER-3 

Function Description:

* CV-30 is the development of PC TEST CARD model: CV-04 series.

* Suitable for PC XT/286/386/486/586/PII/PIII... compatible system.

* LED inductor: RST(RESET DRV), RDY(I/O CHECK READY), MEMR, MEMW,

IOR, IOW, VCC, GND, -5V, +12V, -12V.

* ERROR CODE and DATA(D0-D7) read/write in DIGITs(hexadecimal) display, if

power on POST(=Power-On-Self-Test) execute, DIGITs display ERROR CODE;

after POST can use for program check point DATA(D0-D7) read/write code.

* Offer two I/O PORT 80H and 300H decode address.

* Latch Function: when SETUP VALUE = DATA VALUE --> LATCH.

* Offer RUN(RUN POST) or SEL(SELECT LATCH) function for chose;

(1) Debug mother board, can use RUN(RUN POST) function:

.When power on, CV-30 will read CHECK POINT value from BIOS, compare with

.BIOS ERROR CODE MESSAGE, will know defective position.

(2) Debug mother board, can use SEL(LATCH) function:

Use two pieces DEBUGGERs to compare mother board circuit signals for repairing.

* Software Debug:

Use CV-30 I/O PORT 80H, 300H for software program CHECK POINT display,

can WRITE/READ value to it, no need to interrupt program execution.

CV-31 DEBUGGER-3 

Function Description:

* CV-31 is the development of DEBUGGER-2 CARD model: CV-25, 26, 27.

* Most functions same as CV-30, addition step by step trace function.

* With two STEP by STEP trace methods, NORmal(man) and AUTO step.

* Step by step operation:

Use LED display A0-A19(ADDRESS BUS) and D0-D7(DATA BUS) in Binary code.

* Step by step(trace) function:

(1) When ERROR CODE display nonsense code 00 or FF, can use CV-31 to check

ADDRESS BUS and DATA BUS circuit signals correct or not.

(2) Can trace BIOS operation STEP BY STEP.

(3) Can check ADDRESS BUS or DATA BUS circuit open/short or not.

(4) Can check ADDRESS BUS or DATA BUS shortage with other signals or not.

(5) Will know real address when system halted.

* It also can do step by step function after LATCH.

CV-32 DEBUGGER-3 

* All functions, operations, testing same as CV-31.

* Difference:

DIGITs display ADDRESS BUS and DATA BUS codes in hexadecimal for easy view.

CV-33 DEBUGGER-3  

* All functions, operations, testing same as CV-31.

* Difference:

With LED and DIGITs synchronous display ADDRESS BUS and DATA 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: 22/04/1998 Update:09.29.2009