CMT 64Kb RAM module for HP-71b question

[J-F Garnier]

(10-11-2021 09:26 PM)mfleming Wrote:  However (wait for it) the table is not cleared by a RESETX command.

Yeah, I was suspecting that :-)

Quote:Is there another configuration pass following the FREE or CLAIM command?

Each FREE/CLAIM command is followed by a configuration.

Quote:Looks like a call to the initialize mapping table routine is needed for RESETX. Would it also be necessary to do the same with the UNCONFIG command? I've only seen that in the first configuration pass as some sort address decoding test.

UNCONFIG is used for RAM, after checking the RAM/IRAM status, to move it from 80000 to 40000.
It is normally not used for ROM and can be ignored by ROM emulators. But if one day you do a RAM emulator, you will need to manage the UNCONFIG.
See also these comments.

J-F