CMT 64Kb RAM module for HP-71b question

[rprosperi]

(10-11-2021 02:55 PM)Dave Frederickson Wrote:  

(10-11-2021 12:44 PM)Sylvain Cote Wrote:  mmm, ok, what happen when I remove module now ?

1. four RAM memory modules, all part of main RAM, MEM → 146303
2. power off, remove 32K RAM from port 4, power on, MEM → 113540
3. power off, remove 32K RAM from port 3, power on, Memory Lost , MEM → 82236
4. power off, remove 32K RAM from port 2, power on, MEM → 49523
5. power off, remove 32K RAM from port 1, power on, MEM → 16760
   

I have to go, but more test are needed on this last part.

Sylvain

You MUST FREEPORT a RAM module before removing it.

Not if there is nothing in the file chain stored in that memory block (e.g. memory that is 'higher' address than any used files) which is why removing Ports 4, 2 and 1 don't cause a crash.

This is pretty interesting but no time to experiment until the end of the week....