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[SOLVED] Help me about ISA bus I/O port address??????????????

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shell.albert

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Hi friends,
I meet a serious problem.My company got a ISA bus data acquisition card.My task is to develop a PC based control and analysis software.But the seller only can supply the communication protocol.No I/O address.No Test Program.

From the schematics,I know the card only use A9~A1 9bit address,so the address range is 0x000~0x3FE, the address range is so wide.

What should I do ? How can I know the register address, I/O address?
Come on ,help me!
Help me!!!:oops:


---------- Post added at 02:39 ---------- Previous post was at 02:30 ----------

No good sleep last night,I got three method,as following:

1.Write a test program under dos using inport() outport() function,scan and read all the port in address range 0x000~0x3FE.
According the read result to adjust the port address.If zero returned,this port must not be.If non-zero returned,this port is maybe a valid I/O address.

2.Thanks to the ISA logical is implemented by FPGA from Altera.From the schematics,no decoder logic can be found.So why not reverse the FPGA souce code,convert the program file(binary,hex) to VHDL/Verilog HDL code to see the detail of decode logical.

3.So far, no idea.
 

srizbf

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you can have good sleep.
how many modules are there in your isa card ?
like , one adc(with 8 channels), one dac(with 2channels) and one ppi ...like that.

give the ic name and other details.
 

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