HP-71B IL Module Version

[J-F Garnier]

(01-27-2018 05:50 PM)Dave Frederickson Wrote:  If JP3 is used for the 1A 71 IL module then that was not mentioned when beta testing the v2.1 firmware.
How does this affect use with the 41, the Portable's, Series 80, etc?

Some rare (not all) HP-IL module 1A have a timing issue with the PIL-Box, that I mentioned a few times (here and here for instance).

The PIL-Box firmware has support for a optional fix (since version 1.4). The fix is enabled with jumper JP3.
The fix is to be used with these rare HP-71B HP-IL modules version 1A that have problems with the PIL-Box, it has no interest at all with other controllers (HP41/75/110).
Moreover the fix is optional because it can safely fix the problem when only one HP-71B is connected to the PIL-Box but may incorrectly modify HP-IL frames if there are more HP-IL devices in the loop.
So this fix must be considered only as a workaround if you really need to use one of these problematic modules 1A, and only for a simple PIL-Box + HP-71B configuration.

J-F