Neil.

Thanks for the reply.

Obviously this programmer/software is obsolete but these options could have been better worded.

Either way I definitely programmed the device using the default.

Is there any documentation that talks about these "XXX as YYY" device types? What is occurring, any ...

First. Can you answer my question on the meaning of the two check boxes.

Again I see as default for all GAL20* devices:

[X] Device without security fuse
[ ] Security fuse

I can deselect the former and have:

[ ] Device without security fuse
[ ] Security fuse

I have no idea what this second form ...

Well then there seems to be a problem.

I have a PAL20L8 which I read as a PAL20L8.

I wanted to program a replacement using a GAL20V8 which according to the device datasheet it can emulate.

I selected device "GAL20V8 as PAL20L8". I left the checkboxes as default, which based on your explanation ...

Hello PhilArqiva,

After READing a protected device the buffer content will usually be all FFh or 00h.


Sorry to threadjack but I'm trying to program a GAL20V8 using a Dataman 48pro.

There are two checkbox options at programming time.

[X] Device without security fuse
[ ] Security fuse

Can you ...