HP-41 series Modules and Module holder

The HP-41 series calculators have 4 extension slots. A large number of accessories are developed to extend the memory and functionality of these calculators.

HP 82106A Memory module.

The HP 82106A extend the number of registers with 64. This module can only be used for the HP-41C model. The other models already have the maximum amount of memory.

 

HP 82170A Quad memory module

The HP 82170A extend the number of registers with 256. This is the maximum number of registers that can be added. This module has four times the capacity of the HP 82106A and is also named the Quad memory module. This module can only be used for the HP-41C model. The other models already have the maximum amount of memory.

 

HP 82180A Extended Functions / Memory Module

The HP 82180A adds 47 useful functions to those already available on the HP-41 calculator.and also provides it with extended memory. The number of added registers is 127. An overview of the added functions is listed in the Quick reference Card. A scan of this card can be downloaded here.

 

HP 82151A Module holder

The HP 82151A can hold up to 3 modules

 

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