Decompiler for PALCE20V8H executable

[rjs2010]

All,

I have an executable code we use to program the PAL PALCE20V8H on a board and this project is so old (more than 15 years) that nobody has the source code from where this executable came from. Now we have a problem on the board and everything points to the PAL and we want to modify the PAL program.

I am no expert at these PALs but know FPGA programming. Can anybody please point me to a decompiler if there is one, from which i can get the source code?

Any other suggestions to decode the executable is much appreciated.

Thanks

 

[IanP]

PAL device can be programmed by JEDEC file only .. Dou you actually have one?
Or, what type of fusefile do you have?

If you can read a non-secured PAL device and save the buffer as a jedec file, you are a lucky bustard ..
There is several jedec file compilers that convert your boolean equations to a JEDEC file before programming LOGIC devices such as PAL, GAL ..

The WinCupl is quite popular; here are links:
**broken link removed**
The serial number you should enter is 66999998 ..
**broken link removed**


Rgds,
IanP

 

[FvM]

As far as I remember, the JEDEC file is directly corresponding to fuse map in the PAL/PALCE datasheets. Some PAL programmers
used to display the JEDEC file in structured form according to the fuse map. A more verbose explanation of the JEDEC file can be
most likely found in some documents from Lattice or previous CPLD vendors. Please apologize for this rather general answer,
but it's been quite a long time ...

 

[srizbf]

I have recently built a jedec to verilog code for pals. will it be useful to you ?
srizbf
4thapril2010